diff --git a/sdkdemo/src/main/java/com/tencent/iot/explorer/link/demo/video/preview/VideoPreviewActivity.kt b/sdkdemo/src/main/java/com/tencent/iot/explorer/link/demo/video/preview/VideoPreviewActivity.kt
index 1baaa7c64..7eced5a74 100644
--- a/sdkdemo/src/main/java/com/tencent/iot/explorer/link/demo/video/preview/VideoPreviewActivity.kt
+++ b/sdkdemo/src/main/java/com/tencent/iot/explorer/link/demo/video/preview/VideoPreviewActivity.kt
@@ -431,7 +431,8 @@ class VideoPreviewActivity : VideoBaseActivity(), EventView, TextureView.Surface
 
             it.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "analyzemaxduration", 100)
             it.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "probesize", 25 * 1024)
-//            it.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "packet-buffering", 0)
+            it.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "packet-buffering", 0)
+            it.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "max-buffer-size",1024); //最大缓冲大小,单位kb
             it.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "start-on-prepared", 1)
             it.setOption(IjkMediaPlayer.OPT_CATEGORY_CODEC, "threads", 1)
             it.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "sync-av-start", 0)