obs-websocket 5.0.1 Protocol

Main Table of Contents

General Intro
- Design Goals
Connecting to obs-websocket
- Connection steps
  - Connection Notes
- Creating an authentication string
Message Types (OpCodes)

General Intro

obs-websocket provides a feature-rich RPC communication protocol, giving access to much of OBS's feature set. This document contains everything you should know in order to make a connection and use obs-websocket's functionality to the fullest.

Design Goals

Abstraction of identification, events, requests, and batch requests into dedicated message types
Conformity of request naming using similar terms like Get, Set, Get[x]List, Start[x], Toggle[x]
Conformity of OBS data field names like sourceName, sourceKind, sourceType, sceneName, sceneItemName
Error code response system - integer corrosponds to type of error, with optional comment
Possible support for multiple message encoding options: JSON and MessagePack
PubSub system - Allow clients to specify which events they do or don't want to receive from OBS
RPC versioning - Client and server negotiate the latest version of the obs-websocket protocol to communicate with.

Connecting to obs-websocket

Here's info on how to connect to obs-websocket

Connection steps

These steps should be followed precisely. Failure to connect to the server as instructed will likely result in your client being treated in an undefined way.

Initial HTTP request made to the obs-websocket server.
- The Sec-WebSocket-Protocol header can be used to tell obs-websocket which kind of message encoding to use. By default, obs-websocket uses JSON over text. Available subprotocols:
  - obswebsocket.json - JSON over text frames
  - obswebsocket.msgpack - MsgPack over binary frames
Once the connection is upgraded, the websocket server will immediately send an OpCode 0 Hello message to the client.
The client listens for the Hello and responds with an OpCode 1 Identify containing all appropriate session parameters.
- If there is an authentication field in the messageData object, the server requires authentication, and the steps in Creating an authentication string should be followed.
- If there is no authentication field, the resulting Identify object sent to the server does not require an authentication string.
- The client determines if the server's rpcVersion is supported, and if not it provides its closest supported version in Identify.
The server receives and processes the Identify sent by the client.
- If authentication is required and the Identify message data does not contain an authentication string, or the string is not correct, the connection is closed with WebSocketCloseCode::AuthenticationFailed
- If the client has requested an rpcVersion which the server cannot use, the connection is closed with WebSocketCloseCode::UnsupportedRpcVersion. This system allows both the server and client to have seamless backwards compatability.
- If any other parameters are malformed (invalid type, etc), the connection is closed with an appropriate close code.
Once identification is processed on the server, the server responds to the client with an OpCode 2 Identified.
The client will begin receiving events from obs-websocket and may now make requests to obs-websocket.
At any time after a client has been identified, it may send an OpCode 3 Reidentify message to update certain allowed session parameters. The server will respond in the same way it does during initial identification.

Connection Notes

If a binary frame is received when using the obswebsocket.json (default) subprotocol, or a text frame is received while using the obswebsocket.msgpack subprotocol, the connection is closed with WebSocketCloseCode::MessageDecodeError.
The obs-websocket server listens for any messages containing a request-type field in the first level JSON from unidentified clients. If a message matches, the connection is closed with WebSocketCloseCode::UnsupportedRpcVersion and a warning is logged.
If a message with a messageType is not recognized to the obs-websocket server, the connection is closed with WebSocketCloseCode::UnknownOpCode.
At no point may the client send any message other than a single Identify before it has received an Identified. Doing so will result in the connection being closed with WebSocketCloseCode::NotIdentified.

Creating an authentication string

obs-websocket uses SHA256 to transmit authentication credentials. The server starts by sending an object in the authentication field of its Hello message data. The client processes the authentication challenge and responds via the authentication string in the Identify message data.

For this guide, we'll be using supersecretpassword as the password.

The authentication object in Hello looks like this (example):

{
    "challenge": "+IxH4CnCiqpX1rM9scsNynZzbOe4KhDeYcTNS3PDaeY=",
    "salt": "lM1GncleQOaCu9lT1yeUZhFYnqhsLLP1G5lAGo3ixaI="
}

To generate the authentication string, follow these steps:

Concatenate the websocket password with the salt provided by the server (password + salt)
Generate an SHA256 binary hash of the result and base64 encode it, known as a base64 secret.
Concatenate the base64 secret with the challenge sent by the server (base64_secret + challenge)
Generate a binary SHA256 hash of that result and base64 encode it. You now have your authentication string.

For real-world examples of the authentication string creation, refer to the obs-websocket client libraries listed on the README.

Message Types (OpCodes)

The following message types are the low-level message types which may be sent to and from obs-websocket.

Messages sent from the obs-websocket server or client may contain these first-level fields, known as the base object:

{
  "op": number,
  "d": object
}

op is a WebSocketOpCode OpCode.
d is an object of the data fields associated with the operation.

Hello (OpCode 0)

Sent from: obs-websocket
Sent to: Freshly connected websocket client
Description: First message sent from the server immediately on client connection. Contains authentication information if auth is required. Also contains RPC version for version negotiation.

Data Keys:

{
  "obsWebSocketVersion": string,
  "rpcVersion": number,
  "authentication": object(optional)
}

rpcVersion is a version number which gets incremented on each breaking change to the obs-websocket protocol. Its usage in this context is to provide the current rpc version that the server would like to use.

Example Messages: Authentication is required

{
  "op": 0,
  "d": {
    "obsWebSocketVersion": "5.0.1",
    "rpcVersion": 1,
    "authentication": {
      "challenge": "+IxH4CnCiqpX1rM9scsNynZzbOe4KhDeYcTNS3PDaeY=",
      "salt": "lM1GncleQOaCu9lT1yeUZhFYnqhsLLP1G5lAGo3ixaI="
    }
  }
}

Authentication is not required

{
  "op": 0,
  "d": {
    "obsWebSocketVersion": "5.0.1",
    "rpcVersion": 1
  }
}

Identify (OpCode 1)

Sent from: Freshly connected websocket client
Sent to: obs-websocket
Description: Response to Hello message, should contain authentication string if authentication is required, along with PubSub subscriptions and other session parameters.

Data Keys:

{
  "rpcVersion": number,
  "authentication": string(optional),
  "eventSubscriptions": number(optional) = (EventSubscription::All)
}

rpcVersion is the version number that the client would like the obs-websocket server to use.
eventSubscriptions is a bitmask of EventSubscriptions items to subscribe to events and event categories at will. By default, all event categories are subscribed, except for events marked as high volume. High volume events must be explicitly subscribed to.

Example Message:

{
  "op": 1,
  "d": {
    "rpcVersion": 1,
    "authentication": "Dj6cLS+jrNA0HpCArRg0Z/Fc+YHdt2FQfAvgD1mip6Y=",
    "eventSubscriptions": 33
  }
}

Identified (OpCode 2)

Sent from: obs-websocket
Sent to: Freshly identified client
Description: The identify request was received and validated, and the connection is now ready for normal operation.

Data Keys:

{
  "negotiatedRpcVersion": number
}

If rpc version negotiation succeeds, the server determines the RPC version to be used and gives it to the client as negotiatedRpcVersion

Example Message:

{
  "op": 2,
  "d": {
    "negotiatedRpcVersion": 1
  }
}

Reidentify (OpCode 3)

Sent from: Identified client
Sent to: obs-websocket
Description: Sent at any time after initial identification to update the provided session parameters.

Data Keys:

{
  "eventSubscriptions": number(optional) = (EventSubscription::All)
}

Only the listed parameters may be changed after initial identification. To change a parameter not listed, you must reconnect to the obs-websocket server.

Event (OpCode 5)

Sent from: obs-websocket
Sent to: All subscribed and identified clients
Description: An event coming from OBS has occured. Eg scene switched, source muted.

Data Keys:

{
  "eventType": string,
  "eventIntent": number,
  "eventData": object(optional)
}

eventIntent is the original intent required to be subscribed to in order to receive the event.

Example Message:

{
  "op": 5,
  "d": {
    "eventType": "StudioModeStateChanged",
    "eventIntent": 1,
    "eventData": {
      "studioModeEnabled": true
    }
  }
}

Request (OpCode 6)

Sent from: Identified client
Sent to: obs-websocket
Description: Client is making a request to obs-websocket. Eg get current scene, create source.

Data Keys:

{
  "requestType": string,
  "requestId": string,
  "requestData": object(optional),

}

Example Message:

{
  "op": 6,
  "d": {
    "requestType": "SetCurrentProgramScene",
    "requestId": "f819dcf0-89cc-11eb-8f0e-382c4ac93b9c",
    "requestData": {
      "sceneName": "Scene 12"
    }
  }
}

RequestResponse (OpCode 7)

Sent from: obs-websocket
Sent to: Identified client which made the request
Description: obs-websocket is responding to a request coming from a client.

Data Keys:

{
  "requestType": string,
  "requestId": string,
  "requestStatus": object,
  "responseData": object(optional)
}

The requestType and requestId are simply mirrors of what was sent by the client.

requestStatus object:

{
  "result": bool,
  "code": number,
  "comment": string(optional)
}

result is true if the request resulted in RequestStatus::Success. False if otherwise.
code is a RequestStatus code.
comment may be provided by the server on errors to offer further details on why a request failed.

Example Messages: Successful Response

{
  "op": 7,
  "d": {
    "requestType": "SetCurrentProgramScene",
    "requestId": "f819dcf0-89cc-11eb-8f0e-382c4ac93b9c",
    "requestStatus": {
      "result": true,
      "code": 100
    }
  }
}

Failure Response

{
  "op": 7,
  "d": {
    "requestType": "SetCurrentProgramScene",
    "requestId": "f819dcf0-89cc-11eb-8f0e-382c4ac93b9c",
    "requestStatus": {
      "result": false,
      "code": 608,
      "comment": "Parameter: sceneName"
    }
  }
}

RequestBatch (OpCode 8)

Sent from: Identified client
Sent to: obs-websocket
Description: Client is making a batch of requests for obs-websocket. Requests are processed serially (in order) by the server.

Data Keys:

{
  "requestId": string,
  "haltOnFailure": bool(optional) = false,
  "executionType": number(optional) = RequestBatchExecutionType::SerialRealtime
  "requests": array<object>
}

When haltOnFailure is true, the processing of requests will be halted on first failure. Returns only the processed requests in RequestBatchResponse.
Requests in the requests array follow the same structure as the Request payload data format, however requestId is an optional field.

RequestBatchResponse (OpCode 9)

Sent from: obs-websocket
Sent to: Identified client which made the request
Description: obs-websocket is responding to a request batch coming from the client.

Data Keys:

{
  "requestId": string,
  "results": array<object>
}

Enums

These are enumeration declarations, which are referenced throughout obs-websocket's protocol.

Enumerations Table of Contents

WebSocketOpCode
WebSocketCloseCode
RequestBatchExecutionType
RequestStatus
EventSubscription

WebSocketOpCode

WebSocketOpCode::Hello

The initial message sent by obs-websocket to newly connected clients.

Identifier Value: 0
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketOpCode::Identify

The message sent by a newly connected client to obs-websocket in response to a Hello.

Identifier Value: 1
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketOpCode::Identified

The response sent by obs-websocket to a client after it has successfully identified with obs-websocket.

Identifier Value: 2
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketOpCode::Reidentify

The message sent by an already-identified client to update identification parameters.

Identifier Value: 3
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketOpCode::Event

The message sent by obs-websocket containing an event payload.

Identifier Value: 5
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketOpCode::Request

The message sent by a client to obs-websocket to perform a request.

Identifier Value: 6
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketOpCode::RequestResponse

The message sent by obs-websocket in response to a particular request from a client.

Identifier Value: 7
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketOpCode::RequestBatch

The message sent by a client to obs-websocket to perform a batch of requests.

Identifier Value: 8
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketOpCode::RequestBatchResponse

The message sent by obs-websocket in response to a particular batch of requests from a client.

Identifier Value: 9
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode

WebSocketCloseCode::DontClose

For internal use only to tell the request handler not to perform any close action.

Identifier Value: 0
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::UnknownReason

Unknown reason, should never be used.

Identifier Value: 4000
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::MessageDecodeError

The server was unable to decode the incoming websocket message.

Identifier Value: 4002
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::MissingDataField

A data field is required but missing from the payload.

Identifier Value: 4003
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::InvalidDataFieldType

A data field's value type is invalid.

Identifier Value: 4004
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::InvalidDataFieldValue

A data field's value is invalid.

Identifier Value: 4005
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::UnknownOpCode

The specified op was invalid or missing.

Identifier Value: 4006
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::NotIdentified

The client sent a websocket message without first sending Identify message.

Identifier Value: 4007
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::AlreadyIdentified

The client sent an Identify message while already identified.

Note: Once a client has identified, only Reidentify may be used to change session parameters.

Identifier Value: 4008
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::AuthenticationFailed

The authentication attempt (via Identify) failed.

Identifier Value: 4009
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::UnsupportedRpcVersion

The server detected the usage of an old version of the obs-websocket RPC protocol.

Identifier Value: 4010
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::SessionInvalidated

The websocket session has been invalidated by the obs-websocket server.

Note: This is the code used by the Kick button in the UI Session List. If you receive this code, you must not automatically reconnect.

Identifier Value: 4011
Latest Supported RPC Version: 1
Added in v5.0.0

WebSocketCloseCode::UnsupportedFeature

A requested feature is not supported due to hardware/software limitations.

Identifier Value: 4012
Latest Supported RPC Version: 1
Added in v5.0.0

RequestBatchExecutionType

RequestBatchExecutionType::None

Not a request batch.

Identifier Value: -1
Latest Supported RPC Version: 1
Added in v5.0.0

RequestBatchExecutionType::SerialRealtime

A request batch which processes all requests serially, as fast as possible.

Note: To introduce artificial delay, use the Sleep request and the sleepMillis request field.

Identifier Value: 0
Latest Supported RPC Version: 1
Added in v5.0.0

RequestBatchExecutionType::SerialFrame

A request batch type which processes all requests serially, in sync with the graphics thread. Designed to provide high accuracy for animations.

Note: To introduce artificial delay, use the Sleep request and the sleepFrames request field.

Identifier Value: 1
Latest Supported RPC Version: 1
Added in v5.0.0

RequestBatchExecutionType::Parallel

A request batch type which processes all requests using all available threads in the thread pool.

Note: This is mainly experimental, and only really shows its colors during requests which require lots of active processing, like GetSourceScreenshot.

Identifier Value: 2
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus

RequestStatus::Unknown

Unknown status, should never be used.

Identifier Value: 0
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::NoError

For internal use to signify a successful field check.

Identifier Value: 10
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::Success

The request has succeeded.

Identifier Value: 100
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::MissingRequestType

The requestType field is missing from the request data.

Identifier Value: 203
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::UnknownRequestType

The request type is invalid or does not exist.

Identifier Value: 204
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::GenericError

Generic error code.

Note: A comment is required to be provided by obs-websocket.

Identifier Value: 205
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::UnsupportedRequestBatchExecutionType

The request batch execution type is not supported.

Identifier Value: 206
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::MissingRequestField

A required request field is missing.

Identifier Value: 300
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::MissingRequestData

The request does not have a valid requestData object.

Identifier Value: 301
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::InvalidRequestField

Generic invalid request field message.

Note: A comment is required to be provided by obs-websocket.

Identifier Value: 400
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::InvalidRequestFieldType

A request field has the wrong data type.

Identifier Value: 401
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::RequestFieldOutOfRange

A request field (number) is outside of the allowed range.

Identifier Value: 402
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::RequestFieldEmpty

A request field (string or array) is empty and cannot be.

Identifier Value: 403
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::TooManyRequestFields

There are too many request fields (eg. a request takes two optionals, where only one is allowed at a time).

Identifier Value: 404
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::OutputRunning

An output is running and cannot be in order to perform the request.

Identifier Value: 500
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::OutputNotRunning

An output is not running and should be.

Identifier Value: 501
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::OutputPaused

An output is paused and should not be.

Identifier Value: 502
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::OutputNotPaused

An output is not paused and should be.

Identifier Value: 503
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::OutputDisabled

An output is disabled and should not be.

Identifier Value: 504
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::StudioModeActive

Studio mode is active and cannot be.

Identifier Value: 505
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::StudioModeNotActive

Studio mode is not active and should be.

Identifier Value: 506
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::ResourceNotFound

The resource was not found.

Note: Resources are any kind of object in obs-websocket, like inputs, profiles, outputs, etc.

Identifier Value: 600
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::ResourceAlreadyExists

The resource already exists.

Identifier Value: 601
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::InvalidResourceType

The type of resource found is invalid.

Identifier Value: 602
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::NotEnoughResources

There are not enough instances of the resource in order to perform the request.

Identifier Value: 603
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::InvalidResourceState

The state of the resource is invalid. For example, if the resource is blocked from being accessed.

Identifier Value: 604
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::InvalidInputKind

The specified input (obs_source_t-OBS_SOURCE_TYPE_INPUT) had the wrong kind.

Identifier Value: 605
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::ResourceNotConfigurable

The resource does not support being configured.

This is particularly relevant to transitions, where they do not always have changeable settings.

Identifier Value: 606
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::InvalidFilterKind

The specified filter (obs_source_t-OBS_SOURCE_TYPE_FILTER) had the wrong kind.

Identifier Value: 607
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::ResourceCreationFailed

Creating the resource failed.

Identifier Value: 700
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::ResourceActionFailed

Performing an action on the resource failed.

Identifier Value: 701
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::RequestProcessingFailed

Processing the request failed unexpectedly.

Note: A comment is required to be provided by obs-websocket.

Identifier Value: 702
Latest Supported RPC Version: 1
Added in v5.0.0

RequestStatus::CannotAct

The combination of request fields cannot be used to perform an action.

Identifier Value: 703
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription

EventSubscription::None

Subcription value used to disable all events.

Identifier Value: 0
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::General

Subscription value to receive events in the General category.

Identifier Value: (1 << 0)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::Config

Subscription value to receive events in the Config category.

Identifier Value: (1 << 1)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::Scenes

Subscription value to receive events in the Scenes category.

Identifier Value: (1 << 2)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::Inputs

Subscription value to receive events in the Inputs category.

Identifier Value: (1 << 3)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::Transitions

Subscription value to receive events in the Transitions category.

Identifier Value: (1 << 4)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::Filters

Subscription value to receive events in the Filters category.

Identifier Value: (1 << 5)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::Outputs

Subscription value to receive events in the Outputs category.

Identifier Value: (1 << 6)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::SceneItems

Subscription value to receive events in the SceneItems category.

Identifier Value: (1 << 7)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::MediaInputs

Subscription value to receive events in the MediaInputs category.

Identifier Value: (1 << 8)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::Vendors

Subscription value to receive the VendorEvent event.

Identifier Value: (1 << 9)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::Ui

Subscription value to receive events in the Ui category.

Identifier Value: (1 << 10)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::All

Helper to receive all non-high-volume events.

Identifier Value: (General | Config | Scenes | Inputs | Transitions | Filters | Outputs | SceneItems | MediaInputs | Vendors | Ui)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::InputVolumeMeters

Subscription value to receive the InputVolumeMeters high-volume event.

Identifier Value: (1 << 16)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::InputActiveStateChanged

Subscription value to receive the InputActiveStateChanged high-volume event.

Identifier Value: (1 << 17)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::InputShowStateChanged

Subscription value to receive the InputShowStateChanged high-volume event.

Identifier Value: (1 << 18)
Latest Supported RPC Version: 1
Added in v5.0.0

EventSubscription::SceneItemTransformChanged

Subscription value to receive the SceneItemTransformChanged high-volume event.

Identifier Value: (1 << 19)
Latest Supported RPC Version: 1
Added in v5.0.0

Events

Events Table of Contents

General Events
- ExitStarted
- VendorEvent
Config Events
Scenes Events
Inputs Events
Transitions Events
Filters Events
Scene Items Events
Outputs Events
Media Inputs Events
Ui Events
- StudioModeStateChanged

General Events

ExitStarted

OBS has begun the shutdown process.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

VendorEvent

An event has been emitted from a vendor.

A vendor is a unique name registered by a third-party plugin or script, which allows for custom requests and events to be added to obs-websocket. If a plugin or script implements vendor requests or events, documentation is expected to be provided with them.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
vendorName	String	Name of the vendor emitting the event
eventType	String	Vendor-provided event typedef
eventData	Object	Vendor-provided event data. {} if event does not provide any data

Config Events

CurrentSceneCollectionChanging

The current scene collection has begun changing.

Note: We recommend using this event to trigger a pause of all polling requests, as performing any requests during a scene collection change is considered undefined behavior and can cause crashes!

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneCollectionName	String	Name of the current scene collection

CurrentSceneCollectionChanged

The current scene collection has changed.

Note: If polling has been paused during CurrentSceneCollectionChanging, this is the que to restart polling.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneCollectionName	String	Name of the new scene collection

SceneCollectionListChanged

The scene collection list has changed.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneCollections	Array<String>	Updated list of scene collections

CurrentProfileChanging

The current profile has begun changing.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
profileName	String	Name of the current profile

CurrentProfileChanged

The current profile has changed.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
profileName	String	Name of the new profile

ProfileListChanged

The profile list has changed.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
profiles	Array<String>	Updated list of profiles

Scenes Events

SceneCreated

A new scene has been created.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the new scene
isGroup	Boolean	Whether the new scene is a group

SceneRemoved

A scene has been removed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the removed scene
isGroup	Boolean	Whether the scene was a group

SceneNameChanged

The name of a scene has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
oldSceneName	String	Old name of the scene
sceneName	String	New name of the scene

CurrentProgramSceneChanged

The current program scene has changed.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the scene that was switched to

CurrentPreviewSceneChanged

The current preview scene has changed.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the scene that was switched to

SceneListChanged

The list of scenes has changed.

TODO: Make OBS fire this event when scenes are reordered.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
scenes	Array<Object>	Updated array of scenes

Inputs Events

InputCreated

An input has been created.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
inputKind	String	The kind of the input
unversionedInputKind	String	The unversioned kind of input (aka no `_v2` stuff)
inputSettings	Object	The settings configured to the input when it was created
defaultInputSettings	Object	The default settings for the input

InputRemoved

An input has been removed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input

InputNameChanged

The name of an input has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
oldInputName	String	Old name of the input
inputName	String	New name of the input

InputActiveStateChanged

An input's active state has changed.

When an input is active, it means it's being shown by the program feed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
videoActive	Boolean	Whether the input is active

InputShowStateChanged

An input's show state has changed.

When an input is showing, it means it's being shown by the preview or a dialog.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
videoShowing	Boolean	Whether the input is showing

InputMuteStateChanged

An input's mute state has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
inputMuted	Boolean	Whether the input is muted

InputVolumeChanged

An input's volume level has changed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
inputVolumeMul	Number	New volume level in multimap
inputVolumeDb	Number	New volume level in dB

InputAudioBalanceChanged

The audio balance value of an input has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the affected input
inputAudioBalance	Number	New audio balance value of the input

InputAudioSyncOffsetChanged

The sync offset of an input has changed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
inputAudioSyncOffset	Number	New sync offset in milliseconds

InputAudioTracksChanged

The audio tracks of an input have changed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
inputAudioTracks	Object	Object of audio tracks along with their associated enable states

InputAudioMonitorTypeChanged

The monitor type of an input has changed.

Available types are:

OBS_MONITORING_TYPE_NONE
OBS_MONITORING_TYPE_MONITOR_ONLY
OBS_MONITORING_TYPE_MONITOR_AND_OUTPUT
Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
monitorType	String	New monitor type of the input

InputVolumeMeters

A high-volume event providing volume levels of all active inputs every 50 milliseconds.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputs	Array<Object>	Array of active inputs with their associated volume levels

Transitions Events

CurrentSceneTransitionChanged

The current scene transition has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
transitionName	String	Name of the new transition

CurrentSceneTransitionDurationChanged

The current scene transition duration has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
transitionDuration	Number	Transition duration in milliseconds

SceneTransitionStarted

A scene transition has started.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
transitionName	String	Scene transition name

SceneTransitionEnded

A scene transition has completed fully.

Note: Does not appear to trigger when the transition is interrupted by the user.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
transitionName	String	Scene transition name

SceneTransitionVideoEnded

A scene transition's video has completed fully.

Useful for stinger transitions to tell when the video actually ends. SceneTransitionEnded only signifies the cut point, not the completion of transition playback.

Note: Appears to be called by every transition, regardless of relevance.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
transitionName	String	Scene transition name

Filters Events

SourceFilterListReindexed

A source's filter list has been reindexed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sourceName	String	Name of the source
filters	Array<Object>	Array of filter objects

SourceFilterCreated

A filter has been added to a source.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sourceName	String	Name of the source the filter was added to
filterName	String	Name of the filter
filterKind	String	The kind of the filter
filterIndex	Number	Index position of the filter
filterSettings	Object	The settings configured to the filter when it was created
defaultFilterSettings	Object	The default settings for the filter

SourceFilterRemoved

A filter has been removed from a source.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sourceName	String	Name of the source the filter was on
filterName	String	Name of the filter

SourceFilterNameChanged

The name of a source filter has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sourceName	String	The source the filter is on
oldFilterName	String	Old name of the filter
filterName	String	New name of the filter

SourceFilterEnableStateChanged

A source filter's enable state has changed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sourceName	String	Name of the source the filter is on
filterName	String	Name of the filter
filterEnabled	Boolean	Whether the filter is enabled

Scene Items Events

SceneItemCreated

A scene item has been created.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the scene the item was added to
sourceName	String	Name of the underlying source (input/scene)
sceneItemId	Number	Numeric ID of the scene item
sceneItemIndex	Number	Index position of the item

SceneItemRemoved

A scene item has been removed.

This event is not emitted when the scene the item is in is removed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the scene the item was removed from
sourceName	String	Name of the underlying source (input/scene)
sceneItemId	Number	Numeric ID of the scene item

SceneItemListReindexed

A scene's item list has been reindexed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the scene
sceneItems	Array<Object>	Array of scene item objects

SceneItemEnableStateChanged

A scene item's enable state has changed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the scene the item is in
sceneItemId	Number	Numeric ID of the scene item
sceneItemEnabled	Boolean	Whether the scene item is enabled (visible)

SceneItemLockStateChanged

A scene item's lock state has changed.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the scene the item is in
sceneItemId	Number	Numeric ID of the scene item
sceneItemLocked	Boolean	Whether the scene item is locked

SceneItemSelected

A scene item has been selected in the Ui.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	Name of the scene the item is in
sceneItemId	Number	Numeric ID of the scene item

SceneItemTransformChanged

The transform/crop of a scene item has changed.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
sceneName	String	The name of the scene the item is in
sceneItemId	Number	Numeric ID of the scene item
sceneItemTransform	Object	New transform/crop info of the scene item

Outputs Events

StreamStateChanged

The state of the stream output has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active
outputState	String	The specific state of the output

RecordStateChanged

The state of the record output has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active
outputState	String	The specific state of the output
outputPath	String	File name for the saved recording, if record stopped. `null` otherwise

ReplayBufferStateChanged

The state of the replay buffer output has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active
outputState	String	The specific state of the output

VirtualcamStateChanged

The state of the virtualcam output has changed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active
outputState	String	The specific state of the output

ReplayBufferSaved

The replay buffer has been saved.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
savedReplayPath	String	Path of the saved replay file

Media Inputs Events

MediaInputPlaybackStarted

A media input has started playing.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input

MediaInputPlaybackEnded

A media input has finished playing.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input

MediaInputActionTriggered

An action has been performed on an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
inputName	String	Name of the input
mediaAction	String	Action performed on the input. See `ObsMediaInputAction` enum

Ui Events

StudioModeStateChanged

Studio mode has been enabled or disabled.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Data Fields:

Name	Type	Description
studioModeEnabled	Boolean	True == Enabled, False == Disabled

Requests

Requests Table of Contents

General Requests
Config Requests
Sources Requests
Scenes Requests
Inputs Requests
Transitions Requests
Filters Requests
Scene Items Requests
Outputs Requests
Stream Requests
Record Requests
Media Inputs Requests
Ui Requests

General Requests

GetVersion

Gets data about the current plugin and RPC version.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
obsVersion	String	Current OBS Studio version
obsWebSocketVersion	String	Current obs-websocket version
rpcVersion	Number	Current latest obs-websocket RPC version
availableRequests	Array<String>	Array of available RPC requests for the currently negotiated RPC version
supportedImageFormats	Array<String>	Image formats available in `GetSourceScreenshot` and `SaveSourceScreenshot` requests.
platform	String	Name of the platform. Usually `windows`, `macos`, or `ubuntu` (linux flavor). Not guaranteed to be any of those
platformDescription	String	Description of the platform, like `Windows 10 (10.0)`

GetStats

Gets statistics about OBS, obs-websocket, and the current session.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
cpuUsage	Number	Current CPU usage in percent
memoryUsage	Number	Amount of memory in MB currently being used by OBS
availableDiskSpace	Number	Available disk space on the device being used for recording storage
activeFps	Number	Current FPS being rendered
averageFrameRenderTime	Number	Average time in milliseconds that OBS is taking to render a frame
renderSkippedFrames	Number	Number of frames skipped by OBS in the render thread
renderTotalFrames	Number	Total number of frames outputted by the render thread
outputSkippedFrames	Number	Number of frames skipped by OBS in the output thread
outputTotalFrames	Number	Total number of frames outputted by the output thread
webSocketSessionIncomingMessages	Number	Total number of messages received by obs-websocket from the client
webSocketSessionOutgoingMessages	Number	Total number of messages sent by obs-websocket to the client

BroadcastCustomEvent

Broadcasts a CustomEvent to all WebSocket clients. Receivers are clients which are identified and subscribed.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
eventData	Object	Data payload to emit to all receivers	None	N/A

CallVendorRequest

Call a request registered to a vendor.

A vendor is a unique name registered by a third-party plugin or script, which allows for custom requests and events to be added to obs-websocket. If a plugin or script implements vendor requests or events, documentation is expected to be provided with them.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
vendorName	String	Name of the vendor to use	None	N/A
requestType	String	The request type to call	None	N/A
?requestData	Object	Object containing appropriate request data	None	{}

Response Fields:

Name	Type	Description
vendorName	String	Echoed of `vendorName`
requestType	String	Echoed of `requestType`
responseData	Object	Object containing appropriate response data. {} if request does not provide any response data

GetHotkeyList

Gets an array of all hotkey names in OBS

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
hotkeys	Array<String>	Array of hotkey names

TriggerHotkeyByName

Triggers a hotkey using its name. See GetHotkeyList

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
hotkeyName	String	Name of the hotkey to trigger	None	N/A

TriggerHotkeyByKeySequence

Triggers a hotkey using a sequence of keys.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
?keyId	String	The OBS key ID to use. See https://github.com/obsproject/obs-studio/blob/master/libobs/obs-hotkeys.h	None	Not pressed
?keyModifiers	Object	Object containing key modifiers to apply	None	Ignored
?keyModifiers.shift	Boolean	Press Shift	None	Not pressed
?keyModifiers.control	Boolean	Press CTRL	None	Not pressed
?keyModifiers.alt	Boolean	Press ALT	None	Not pressed
?keyModifiers.command	Boolean	Press CMD (Mac)	None	Not pressed

Sleep

Sleeps for a time duration or number of frames. Only available in request batches with types SERIAL_REALTIME or SERIAL_FRAME.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sleepMillis	Number	Number of milliseconds to sleep for (if `SERIAL_REALTIME` mode)	>= 0, <= 50000	N/A
sleepFrames	Number	Number of frames to sleep for (if `SERIAL_FRAME` mode)	>= 0, <= 10000	N/A

Config Requests

GetPersistentData

Gets the value of a "slot" from the selected persistent data realm.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
realm	String	The data realm to select. `OBS_WEBSOCKET_DATA_REALM_GLOBAL` or `OBS_WEBSOCKET_DATA_REALM_PROFILE`	None	N/A
slotName	String	The name of the slot to retrieve data from	None	N/A

Response Fields:

Name	Type	Description
slotValue	Any	Value associated with the slot. `null` if not set

SetPersistentData

Sets the value of a "slot" from the selected persistent data realm.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
realm	String	The data realm to select. `OBS_WEBSOCKET_DATA_REALM_GLOBAL` or `OBS_WEBSOCKET_DATA_REALM_PROFILE`	None	N/A
slotName	String	The name of the slot to retrieve data from	None	N/A
slotValue	Any	The value to apply to the slot	None	N/A

GetSceneCollectionList

Gets an array of all scene collections

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
currentSceneCollectionName	String	The name of the current scene collection
sceneCollections	Array<String>	Array of all available scene collections

SetCurrentSceneCollection

Switches to a scene collection.

Note: This will block until the collection has finished changing.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneCollectionName	String	Name of the scene collection to switch to	None	N/A

CreateSceneCollection

Creates a new scene collection, switching to it in the process.

Note: This will block until the collection has finished changing.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneCollectionName	String	Name for the new scene collection	None	N/A

GetProfileList

Gets an array of all profiles

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
currentProfileName	String	The name of the current profile
profiles	Array<String>	Array of all available profiles

SetCurrentProfile

Switches to a profile.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
profileName	String	Name of the profile to switch to	None	N/A

CreateProfile

Creates a new profile, switching to it in the process

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
profileName	String	Name for the new profile	None	N/A

RemoveProfile

Removes a profile. If the current profile is chosen, it will change to a different profile first.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
profileName	String	Name of the profile to remove	None	N/A

GetProfileParameter

Gets a parameter from the current profile's configuration.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
parameterCategory	String	Category of the parameter to get	None	N/A
parameterName	String	Name of the parameter to get	None	N/A

Response Fields:

Name	Type	Description
parameterValue	String	Value associated with the parameter. `null` if not set and no default
defaultParameterValue	String	Default value associated with the parameter. `null` if no default

SetProfileParameter

Sets the value of a parameter in the current profile's configuration.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
parameterCategory	String	Category of the parameter to set	None	N/A
parameterName	String	Name of the parameter to set	None	N/A
parameterValue	String	Value of the parameter to set. Use `null` to delete	None	N/A

GetVideoSettings

Gets the current video settings.

Note: To get the true FPS value, divide the FPS numerator by the FPS denominator. Example: 60000/1001

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
fpsNumerator	Number	Numerator of the fractional FPS value
fpsDenominator	Number	Denominator of the fractional FPS value
baseWidth	Number	Width of the base (canvas) resolution in pixels
baseHeight	Number	Height of the base (canvas) resolution in pixels
outputWidth	Number	Width of the output resolution in pixels
outputHeight	Number	Height of the output resolution in pixels

SetVideoSettings

Sets the current video settings.

Note: Fields must be specified in pairs. For example, you cannot set only baseWidth without needing to specify baseHeight.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
?fpsNumerator	Number	Numerator of the fractional FPS value	>= 1	Not changed
?fpsDenominator	Number	Denominator of the fractional FPS value	>= 1	Not changed
?baseWidth	Number	Width of the base (canvas) resolution in pixels	>= 1, <= 4096	Not changed
?baseHeight	Number	Height of the base (canvas) resolution in pixels	>= 1, <= 4096	Not changed
?outputWidth	Number	Width of the output resolution in pixels	>= 1, <= 4096	Not changed
?outputHeight	Number	Height of the output resolution in pixels	>= 1, <= 4096	Not changed

GetStreamServiceSettings

Gets the current stream service settings (stream destination).

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
streamServiceType	String	Stream service type, like `rtmp_custom` or `rtmp_common`
streamServiceSettings	Object	Stream service settings

SetStreamServiceSettings

Sets the current stream service settings (stream destination).

Note: Simple RTMP settings can be set with type rtmp_custom and the settings fields server and key.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
streamServiceType	String	Type of stream service to apply. Example: `rtmp_common` or `rtmp_custom`	None	N/A
streamServiceSettings	Object	Settings to apply to the service	None	N/A

Sources Requests

GetSourceActive

Gets the active and show state of a source.

Compatible with inputs and scenes.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source to get the active state of	None	N/A

Response Fields:

Name	Type	Description
videoActive	Boolean	Whether the source is showing in Program
videoShowing	Boolean	Whether the source is showing in the UI (Preview, Projector, Properties)

GetSourceScreenshot

Gets a Base64-encoded screenshot of a source.

The imageWidth and imageHeight parameters are treated as "scale to inner", meaning the smallest ratio will be used and the aspect ratio of the original resolution is kept. If imageWidth and imageHeight are not specified, the compressed image will use the full resolution of the source.

Compatible with inputs and scenes.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source to take a screenshot of	None	N/A
imageFormat	String	Image compression format to use. Use `GetVersion` to get compatible image formats	None	N/A
?imageWidth	Number	Width to scale the screenshot to	>= 8, <= 4096	Source value is used
?imageHeight	Number	Height to scale the screenshot to	>= 8, <= 4096	Source value is used
?imageCompressionQuality	Number	Compression quality to use. 0 for high compression, 100 for uncompressed. -1 to use "default" (whatever that means, idk)	>= -1, <= 100	-1

Response Fields:

Name	Type	Description
imageData	String	Base64-encoded screenshot

SaveSourceScreenshot

Saves a screenshot of a source to the filesystem.

The imageWidth and imageHeight parameters are treated as "scale to inner", meaning the smallest ratio will be used and the aspect ratio of the original resolution is kept. If imageWidth and imageHeight are not specified, the compressed image will use the full resolution of the source.

Compatible with inputs and scenes.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source to take a screenshot of	None	N/A
imageFormat	String	Image compression format to use. Use `GetVersion` to get compatible image formats	None	N/A
imageFilePath	String	Path to save the screenshot file to. Eg. `C:\Users\user\Desktop\screenshot.png`	None	N/A
?imageWidth	Number	Width to scale the screenshot to	>= 8, <= 4096	Source value is used
?imageHeight	Number	Height to scale the screenshot to	>= 8, <= 4096	Source value is used
?imageCompressionQuality	Number	Compression quality to use. 0 for high compression, 100 for uncompressed. -1 to use "default" (whatever that means, idk)	>= -1, <= 100	-1

Response Fields:

Name	Type	Description
imageData	String	Base64-encoded screenshot

Scenes Requests

GetSceneList

Gets an array of all scenes in OBS.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
currentProgramSceneName	String	Current program scene
currentPreviewSceneName	String	Current preview scene. `null` if not in studio mode
scenes	Array<Object>	Array of scenes

GetGroupList

Gets an array of all groups in OBS.

Groups in OBS are actually scenes, but renamed and modified. In obs-websocket, we treat them as scenes where we can.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
groups	Array<String>	Array of group names

GetCurrentProgramScene

Gets the current program scene.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
currentProgramSceneName	String	Current program scene

SetCurrentProgramScene

Sets the current program scene.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Scene to set as the current program scene	None	N/A

GetCurrentPreviewScene

Gets the current preview scene.

Only available when studio mode is enabled.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
currentPreviewSceneName	String	Current preview scene

SetCurrentPreviewScene

Sets the current preview scene.

Only available when studio mode is enabled.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Scene to set as the current preview scene	None	N/A

CreateScene

Creates a new scene in OBS.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name for the new scene	None	N/A

RemoveScene

Removes a scene from OBS.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene to remove	None	N/A

SetSceneName

Sets the name of a scene (rename).

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene to be renamed	None	N/A
newSceneName	String	New name for the scene	None	N/A

GetSceneSceneTransitionOverride

Gets the scene transition overridden for a scene.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene	None	N/A

Response Fields:

Name	Type	Description
transitionName	String	Name of the overridden scene transition, else `null`
transitionDuration	Number	Duration of the overridden scene transition, else `null`

SetSceneSceneTransitionOverride

Gets the scene transition overridden for a scene.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene	None	N/A
?transitionName	String	Name of the scene transition to use as override. Specify `null` to remove	None	Unchanged
?transitionDuration	Number	Duration to use for any overridden transition. Specify `null` to remove	>= 50, <= 20000	Unchanged

Inputs Requests

GetInputList

Gets an array of all inputs in OBS.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
?inputKind	String	Restrict the array to only inputs of the specified kind	None	All kinds included

Response Fields:

Name	Type	Description
inputs	Array<Object>	Array of inputs

GetInputKindList

Gets an array of all available input kinds in OBS.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
?unversioned	Boolean	True == Return all kinds as unversioned, False == Return with version suffixes (if available)	None	false

Response Fields:

Name	Type	Description
inputKinds	Array<String>	Array of input kinds

GetSpecialInputs

Gets the names of all special inputs.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
desktop1	String	Name of the Desktop Audio input
desktop2	String	Name of the Desktop Audio 2 input
mic1	String	Name of the Mic/Auxiliary Audio input
mic2	String	Name of the Mic/Auxiliary Audio 2 input
mic3	String	Name of the Mic/Auxiliary Audio 3 input
mic4	String	Name of the Mic/Auxiliary Audio 4 input

CreateInput

Creates a new input, adding it as a scene item to the specified scene.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene to add the input to as a scene item	None	N/A
inputName	String	Name of the new input to created	None	N/A
inputKind	String	The kind of input to be created	None	N/A
?inputSettings	Object	Settings object to initialize the input with	None	Default settings used
?sceneItemEnabled	Boolean	Whether to set the created scene item to enabled or disabled	None	True

Response Fields:

Name	Type	Description
sceneItemId	Number	ID of the newly created scene item

RemoveInput

Removes an existing input.

Note: Will immediately remove all associated scene items.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to remove	None	N/A

SetInputName

Sets the name of an input (rename).

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Current input name	None	N/A
newInputName	String	New name for the input	None	N/A

GetInputDefaultSettings

Gets the default settings for an input kind.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputKind	String	Input kind to get the default settings for	None	N/A

Response Fields:

Name	Type	Description
defaultInputSettings	Object	Object of default settings for the input kind

GetInputSettings

Gets the settings of an input.

Note: Does not include defaults. To create the entire settings object, overlay inputSettings over the defaultInputSettings provided by GetInputDefaultSettings.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to get the settings of	None	N/A

Response Fields:

Name	Type	Description
inputSettings	Object	Object of settings for the input
inputKind	String	The kind of the input

SetInputSettings

Sets the settings of an input.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to set the settings of	None	N/A
inputSettings	Object	Object of settings to apply	None	N/A
?overlay	Boolean	True == apply the settings on top of existing ones, False == reset the input to its defaults, then apply settings.	None	true

GetInputMute

Gets the audio mute state of an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of input to get the mute state of	None	N/A

Response Fields:

Name	Type	Description
inputMuted	Boolean	Whether the input is muted

SetInputMute

Sets the audio mute state of an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to set the mute state of	None	N/A
inputMuted	Boolean	Whether to mute the input or not	None	N/A

ToggleInputMute

Toggles the audio mute state of an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to toggle the mute state of	None	N/A

Response Fields:

Name	Type	Description
inputMuted	Boolean	Whether the input has been muted or unmuted

GetInputVolume

Gets the current volume setting of an input.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to get the volume of	None	N/A

Response Fields:

Name	Type	Description
inputVolumeMul	Number	Volume setting in mul
inputVolumeDb	Number	Volume setting in dB

SetInputVolume

Sets the volume setting of an input.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to set the volume of	None	N/A
?inputVolumeMul	Number	Volume setting in mul	>= 0, <= 20	`inputVolumeDb` should be specified
?inputVolumeDb	Number	Volume setting in dB	>= -100, <= 26	`inputVolumeMul` should be specified

GetInputAudioBalance

Gets the audio balance of an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to get the audio balance of	None	N/A

Response Fields:

Name	Type	Description
inputAudioBalance	Number	Audio balance value from 0.0-1.0

SetInputAudioBalance

Sets the audio balance of an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to set the audio balance of	None	N/A
inputAudioBalance	Number	New audio balance value	>= 0.0, <= 1.0	N/A

GetInputAudioSyncOffset

Gets the audio sync offset of an input.

Note: The audio sync offset can be negative too!

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to get the audio sync offset of	None	N/A

Response Fields:

Name	Type	Description
inputAudioSyncOffset	Number	Audio sync offset in milliseconds

SetInputAudioSyncOffset

Sets the audio sync offset of an input.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to set the audio sync offset of	None	N/A
inputAudioSyncOffset	Number	New audio sync offset in milliseconds	>= -950, <= 20000	N/A

GetInputAudioMonitorType

Gets the audio monitor type of an input.

The available audio monitor types are:

OBS_MONITORING_TYPE_NONE
OBS_MONITORING_TYPE_MONITOR_ONLY
OBS_MONITORING_TYPE_MONITOR_AND_OUTPUT
Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to get the audio monitor type of	None	N/A

Response Fields:

Name	Type	Description
monitorType	String	Audio monitor type

SetInputAudioMonitorType

Sets the audio monitor type of an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to set the audio monitor type of	None	N/A
monitorType	String	Audio monitor type	None	N/A

GetInputAudioTracks

Gets the enable state of all audio tracks of an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input	None	N/A

Response Fields:

Name	Type	Description
inputAudioTracks	Object	Object of audio tracks and associated enable states

SetInputAudioTracks

Sets the enable state of audio tracks of an input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input	None	N/A
inputAudioTracks	Object	Track settings to apply	None	N/A

GetInputPropertiesListPropertyItems

Gets the items of a list property from an input's properties.

Note: Use this in cases where an input provides a dynamic, selectable list of items. For example, display capture, where it provides a list of available displays.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input	None	N/A
propertyName	String	Name of the list property to get the items of	None	N/A

Response Fields:

Name	Type	Description
propertyItems	Array<Object>	Array of items in the list property

PressInputPropertiesButton

Presses a button in the properties of an input.

Note: Use this in cases where there is a button in the properties of an input that cannot be accessed in any other way. For example, browser sources, where there is a refresh button.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input	None	N/A
propertyName	String	Name of the button property to press	None	N/A

Transitions Requests

GetTransitionKindList

Gets an array of all available transition kinds.

Similar to GetInputKindList

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
transitionKinds	Array<String>	Array of transition kinds

GetSceneTransitionList

Gets an array of all scene transitions in OBS.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
currentSceneTransitionName	String	Name of the current scene transition. Can be null
currentSceneTransitionKind	String	Kind of the current scene transition. Can be null
transitions	Array<Object>	Array of transitions

GetCurrentSceneTransition

Gets information about the current scene transition.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
transitionName	String	Name of the transition
transitionKind	String	Kind of the transition
transitionFixed	Boolean	Whether the transition uses a fixed (unconfigurable) duration
transitionDuration	Number	Configured transition duration in milliseconds. `null` if transition is fixed
transitionConfigurable	Boolean	Whether the transition supports being configured
transitionSettings	Object	Object of settings for the transition. `null` if transition is not configurable

SetCurrentSceneTransition

Sets the current scene transition.

Small note: While the namespace of scene transitions is generally unique, that uniqueness is not a guarantee as it is with other resources like inputs.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
transitionName	String	Name of the transition to make active	None	N/A

SetCurrentSceneTransitionDuration

Sets the duration of the current scene transition, if it is not fixed.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
transitionDuration	Number	Duration in milliseconds	>= 50, <= 20000	N/A

SetCurrentSceneTransitionSettings

Sets the settings of the current scene transition.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
transitionSettings	Object	Settings object to apply to the transition. Can be `{}`	None	N/A
?overlay	Boolean	Whether to overlay over the current settings or replace them	None	true

GetCurrentSceneTransitionCursor

Gets the cursor position of the current scene transition.

Note: transitionCursor will return 1.0 when the transition is inactive.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
transitionCursor	Number	Cursor position, between 0.0 and 1.0

TriggerStudioModeTransition

Triggers the current scene transition. Same functionality as the Transition button in studio mode.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

SetTBarPosition

Sets the position of the TBar.

Very important note: This will be deprecated and replaced in a future version of obs-websocket.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
position	Number	New position	>= 0.0, <= 1.0	N/A
?release	Boolean	Whether to release the TBar. Only set `false` if you know that you will be sending another position update	None	`true`

Filters Requests

GetSourceFilterList

Gets an array of all of a source's filters.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source	None	N/A

Response Fields:

Name	Type	Description
filters	Array<Object>	Array of filters

GetSourceFilterDefaultSettings

Gets the default settings for a filter kind.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
filterKind	String	Filter kind to get the default settings for	None	N/A

Response Fields:

Name	Type	Description
defaultFilterSettings	Object	Object of default settings for the filter kind

CreateSourceFilter

Creates a new filter, adding it to the specified source.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source to add the filter to	None	N/A
filterName	String	Name of the new filter to be created	None	N/A
filterKind	String	The kind of filter to be created	None	N/A
?filterSettings	Object	Settings object to initialize the filter with	None	Default settings used

RemoveSourceFilter

Removes a filter from a source.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source the filter is on	None	N/A
filterName	String	Name of the filter to remove	None	N/A

SetSourceFilterName

Sets the name of a source filter (rename).

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source the filter is on	None	N/A
filterName	String	Current name of the filter	None	N/A
newFilterName	String	New name for the filter	None	N/A

GetSourceFilter

Gets the info for a specific source filter.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source	None	N/A
filterName	String	Name of the filter	None	N/A

Response Fields:

Name	Type	Description
filterEnabled	Boolean	Whether the filter is enabled
filterIndex	Number	Index of the filter in the list, beginning at 0
filterKind	String	The kind of filter
filterSettings	Object	Settings object associated with the filter

SetSourceFilterIndex

Sets the index position of a filter on a source.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source the filter is on	None	N/A
filterName	String	Name of the filter	None	N/A
filterIndex	Number	New index position of the filter	>= 0	N/A

SetSourceFilterSettings

Sets the settings of a source filter.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source the filter is on	None	N/A
filterName	String	Name of the filter to set the settings of	None	N/A
filterSettings	Object	Object of settings to apply	None	N/A
?overlay	Boolean	True == apply the settings on top of existing ones, False == reset the input to its defaults, then apply settings.	None	true

SetSourceFilterEnabled

Sets the enable state of a source filter.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source the filter is on	None	N/A
filterName	String	Name of the filter	None	N/A
filterEnabled	Boolean	New enable state of the filter	None	N/A

Scene Items Requests

GetSceneItemList

Gets a list of all scene items in a scene.

Scenes only

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene to get the items of	None	N/A

Response Fields:

Name	Type	Description
sceneItems	Array<Object>	Array of scene items in the scene

GetGroupSceneItemList

Basically GetSceneItemList, but for groups.

Using groups at all in OBS is discouraged, as they are very broken under the hood.

Groups only

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the group to get the items of	None	N/A

Response Fields:

Name	Type	Description
sceneItems	Array<Object>	Array of scene items in the group

GetSceneItemId

Searches a scene for a source, and returns its id.

Scenes and Groups

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene or group to search in	None	N/A
sourceName	String	Name of the source to find	None	N/A
?searchOffset	Number	Number of matches to skip during search. >= 0 means first forward. -1 means last (top) item	>= -1	0

Response Fields:

Name	Type	Description
sceneItemId	Number	Numeric ID of the scene item

CreateSceneItem

Creates a new scene item using a source.

Scenes only

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene to create the new item in	None	N/A
sourceName	String	Name of the source to add to the scene	None	N/A
?sceneItemEnabled	Boolean	Enable state to apply to the scene item on creation	None	True

Response Fields:

Name	Type	Description
sceneItemId	Number	Numeric ID of the scene item

RemoveSceneItem

Removes a scene item from a scene.

Scenes only

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A

DuplicateSceneItem

Duplicates a scene item, copying all transform and crop info.

Scenes only

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A
?destinationSceneName	String	Name of the scene to create the duplicated item in	None	`sceneName` is assumed

Response Fields:

Name	Type	Description
sceneItemId	Number	Numeric ID of the duplicated scene item

GetSceneItemTransform

Gets the transform and crop info of a scene item.

Scenes and Groups

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A

Response Fields:

Name	Type	Description
sceneItemTransform	Object	Object containing scene item transform info

SetSceneItemTransform

Sets the transform and crop info of a scene item.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A
sceneItemTransform	Object	Object containing scene item transform info to update	None	N/A

GetSceneItemEnabled

Gets the enable state of a scene item.

Scenes and Groups

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A

Response Fields:

Name	Type	Description
sceneItemEnabled	Boolean	Whether the scene item is enabled. `true` for enabled, `false` for disabled

SetSceneItemEnabled

Sets the enable state of a scene item.

Scenes and Groups

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A
sceneItemEnabled	Boolean	New enable state of the scene item	None	N/A

GetSceneItemLocked

Gets the lock state of a scene item.

Scenes and Groups

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A

Response Fields:

Name	Type	Description
sceneItemLocked	Boolean	Whether the scene item is locked. `true` for locked, `false` for unlocked

SetSceneItemLocked

Sets the lock state of a scene item.

Scenes and Group

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A
sceneItemLocked	Boolean	New lock state of the scene item	None	N/A

GetSceneItemIndex

Gets the index position of a scene item in a scene.

An index of 0 is at the bottom of the source list in the UI.

Scenes and Groups

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A

Response Fields:

Name	Type	Description
sceneItemIndex	Number	Index position of the scene item

SetSceneItemIndex

Sets the index position of a scene item in a scene.

Scenes and Groups

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A
sceneItemIndex	Number	New index position of the scene item	>= 0	N/A

GetSceneItemBlendMode

Gets the blend mode of a scene item.

Blend modes:

OBS_BLEND_NORMAL
OBS_BLEND_ADDITIVE
OBS_BLEND_SUBTRACT
OBS_BLEND_SCREEN
OBS_BLEND_MULTIPLY
OBS_BLEND_LIGHTEN
OBS_BLEND_DARKEN

Scenes and Groups

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A

Response Fields:

Name	Type	Description
sceneItemBlendMode	String	Current blend mode

SetSceneItemBlendMode

Sets the blend mode of a scene item.

Scenes and Groups

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sceneName	String	Name of the scene the item is in	None	N/A
sceneItemId	Number	Numeric ID of the scene item	>= 0	N/A
sceneItemBlendMode	String	New blend mode	None	N/A

Outputs Requests

GetVirtualCamStatus

Gets the status of the virtualcam output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active

ToggleVirtualCam

Toggles the state of the virtualcam output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active

StartVirtualCam

Starts the virtualcam output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

StopVirtualCam

Stops the virtualcam output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

GetReplayBufferStatus

Gets the status of the replay buffer output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active

ToggleReplayBuffer

Toggles the state of the replay buffer output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active

StartReplayBuffer

Starts the replay buffer output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

StopReplayBuffer

Stops the replay buffer output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

SaveReplayBuffer

Saves the contents of the replay buffer output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

GetLastReplayBufferReplay

Gets the filename of the last replay buffer save file.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
savedReplayPath	String	File path

GetOutputList

Gets the list of available outputs.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

GetOutputStatus

Gets the status of an output.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
outputName	String	Output name	None	N/A

Response Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active
outputReconnecting	Boolean	Whether the output is reconnecting
outputTimecode	String	Current formatted timecode string for the output
outputDuration	Number	Current duration in milliseconds for the output
outputCongestion	Number	Congestion of the output
outputBytes	Number	Number of bytes sent by the output
outputSkippedFrames	Number	Number of frames skipped by the output's process
outputTotalFrames	Number	Total number of frames delivered by the output's process

ToggleOutput

Toggles the status of an output.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
outputName	String	Output name	None	N/A

Response Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active

StartOutput

Starts an output.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
outputName	String	Output name	None	N/A

StopOutput

Stops an output.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
outputName	String	Output name	None	N/A

GetOutputSettings

Gets the settings of an output.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
outputName	String	Output name	None	N/A

Response Fields:

Name	Type	Description
outputSettings	Object	Output settings

SetOutputSettings

Sets the settings of an output.

Complexity Rating: 4/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
outputName	String	Output name	None	N/A
outputSettings	Object	Output settings	None	N/A

Stream Requests

GetStreamStatus

Gets the status of the stream output.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active
outputReconnecting	Boolean	Whether the output is currently reconnecting
outputTimecode	String	Current formatted timecode string for the output
outputDuration	Number	Current duration in milliseconds for the output
outputCongestion	Number	Congestion of the output
outputBytes	Number	Number of bytes sent by the output
outputSkippedFrames	Number	Number of frames skipped by the output's process
outputTotalFrames	Number	Total number of frames delivered by the output's process

ToggleStream

Toggles the status of the stream output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
outputActive	Boolean	New state of the stream output

StartStream

Starts the stream output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

StopStream

Stops the stream output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

SendStreamCaption

Sends CEA-608 caption text over the stream output.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
captionText	String	Caption text	None	N/A

Record Requests

GetRecordStatus

Gets the status of the record output.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
outputActive	Boolean	Whether the output is active
ouputPaused	Boolean	Whether the output is paused
outputTimecode	String	Current formatted timecode string for the output
outputDuration	Number	Current duration in milliseconds for the output
outputBytes	Number	Number of bytes sent by the output

ToggleRecord

Toggles the status of the record output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

StartRecord

Starts the record output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

StopRecord

Stops the record output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
outputPath	String	File name for the saved recording

ToggleRecordPause

Toggles pause on the record output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

PauseRecord

Pauses the record output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

ResumeRecord

Resumes the record output.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Media Inputs Requests

GetMediaInputStatus

Gets the status of a media input.

Media States:

OBS_MEDIA_STATE_NONE
OBS_MEDIA_STATE_PLAYING
OBS_MEDIA_STATE_OPENING
OBS_MEDIA_STATE_BUFFERING
OBS_MEDIA_STATE_PAUSED
OBS_MEDIA_STATE_STOPPED
OBS_MEDIA_STATE_ENDED
OBS_MEDIA_STATE_ERROR
Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the media input	None	N/A

Response Fields:

Name	Type	Description
mediaState	String	State of the media input
mediaDuration	Number	Total duration of the playing media in milliseconds. `null` if not playing
mediaCursor	Number	Position of the cursor in milliseconds. `null` if not playing

SetMediaInputCursor

Sets the cursor position of a media input.

This request does not perform bounds checking of the cursor position.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the media input	None	N/A
mediaCursor	Number	New cursor position to set	>= 0	N/A

OffsetMediaInputCursor

Offsets the current cursor position of a media input by the specified value.

This request does not perform bounds checking of the cursor position.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the media input	None	N/A
mediaCursorOffset	Number	Value to offset the current cursor position by	None	N/A

TriggerMediaInputAction

Triggers an action on a media input.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the media input	None	N/A
mediaAction	String	Identifier of the `ObsMediaInputAction` enum	None	N/A

Ui Requests

GetStudioModeEnabled

Gets whether studio is enabled.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
studioModeEnabled	Boolean	Whether studio mode is enabled

SetStudioModeEnabled

Enables or disables studio mode

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
studioModeEnabled	Boolean	True == Enabled, False == Disabled	None	N/A

OpenInputPropertiesDialog

Opens the properties dialog of an input.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to open the dialog of	None	N/A

OpenInputFiltersDialog

Opens the filters dialog of an input.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to open the dialog of	None	N/A

OpenInputInteractDialog

Opens the interact dialog of an input.

Complexity Rating: 1/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
inputName	String	Name of the input to open the dialog of	None	N/A

GetMonitorList

Gets a list of connected monitors and information about them.

Complexity Rating: 2/5
Latest Supported RPC Version: 1
Added in v5.0.0

Response Fields:

Name	Type	Description
monitors	Array<Object>	a list of detected monitors with some information

OpenVideoMixProjector

Opens a projector for a specific output video mix.

Mix types:

OBS_WEBSOCKET_VIDEO_MIX_TYPE_PREVIEW
OBS_WEBSOCKET_VIDEO_MIX_TYPE_PROGRAM
OBS_WEBSOCKET_VIDEO_MIX_TYPE_MULTIVIEW

Note: This request serves to provide feature parity with 4.x. It is very likely to be changed/deprecated in a future release.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
videoMixType	String	Type of mix to open	None	N/A
?monitorIndex	Number	Monitor index, use `GetMonitorList` to obtain index	None	-1: Opens projector in windowed mode
?projectorGeometry	String	Size/Position data for a windowed projector, in Qt Base64 encoded format. Mutually exclusive with `monitorIndex`	None	N/A

OpenSourceProjector

Opens a projector for a source.

Note: This request serves to provide feature parity with 4.x. It is very likely to be changed/deprecated in a future release.

Complexity Rating: 3/5
Latest Supported RPC Version: 1
Added in v5.0.0

Request Fields:

Name	Type	Description	Value Restrictions	?Default Behavior
sourceName	String	Name of the source to open a projector for	None	N/A
?monitorIndex	Number	Monitor index, use `GetMonitorList` to obtain index	None	-1: Opens projector in windowed mode
?projectorGeometry	String	Size/Position data for a windowed projector, in Qt Base64 encoded format. Mutually exclusive with `monitorIndex`	None	N/A

Files

protocol.md

Latest commit

History

protocol.md

File metadata and controls

obs-websocket 5.0.1 Protocol

Main Table of Contents

General Intro

Design Goals

Connecting to obs-websocket

Connection steps

Connection Notes

Creating an authentication string

Message Types (OpCodes)

Hello (OpCode 0)

Identify (OpCode 1)

Identified (OpCode 2)

Reidentify (OpCode 3)

Event (OpCode 5)

Request (OpCode 6)

RequestResponse (OpCode 7)

RequestBatch (OpCode 8)

RequestBatchResponse (OpCode 9)

Enums

Enumerations Table of Contents

WebSocketOpCode

WebSocketOpCode::Hello

WebSocketOpCode::Identify

WebSocketOpCode::Identified

WebSocketOpCode::Reidentify

WebSocketOpCode::Event

WebSocketOpCode::Request

WebSocketOpCode::RequestResponse

WebSocketOpCode::RequestBatch

WebSocketOpCode::RequestBatchResponse

WebSocketCloseCode

WebSocketCloseCode::DontClose

WebSocketCloseCode::UnknownReason

WebSocketCloseCode::MessageDecodeError

WebSocketCloseCode::MissingDataField

WebSocketCloseCode::InvalidDataFieldType

WebSocketCloseCode::InvalidDataFieldValue

WebSocketCloseCode::UnknownOpCode

WebSocketCloseCode::NotIdentified

WebSocketCloseCode::AlreadyIdentified

WebSocketCloseCode::AuthenticationFailed

WebSocketCloseCode::UnsupportedRpcVersion

WebSocketCloseCode::SessionInvalidated

WebSocketCloseCode::UnsupportedFeature

RequestBatchExecutionType

RequestBatchExecutionType::None

RequestBatchExecutionType::SerialRealtime

RequestBatchExecutionType::SerialFrame

RequestBatchExecutionType::Parallel

RequestStatus

RequestStatus::Unknown

RequestStatus::NoError

RequestStatus::Success

RequestStatus::MissingRequestType

RequestStatus::UnknownRequestType

RequestStatus::GenericError

RequestStatus::UnsupportedRequestBatchExecutionType

RequestStatus::MissingRequestField

RequestStatus::MissingRequestData

RequestStatus::InvalidRequestField

RequestStatus::InvalidRequestFieldType

RequestStatus::RequestFieldOutOfRange

RequestStatus::RequestFieldEmpty

RequestStatus::TooManyRequestFields

RequestStatus::OutputRunning

RequestStatus::OutputNotRunning

RequestStatus::OutputPaused

RequestStatus::OutputNotPaused

RequestStatus::OutputDisabled

RequestStatus::StudioModeActive

RequestStatus::StudioModeNotActive

RequestStatus::ResourceNotFound

RequestStatus::ResourceAlreadyExists

RequestStatus::InvalidResourceType