[enchantment] MJPEG encoding

[lestofante]

Is it possible to encode a MJPEG stream (like from webcam) to h264 using this library? If yes can you point out how? if not, do you plan to implement it?

[dickontoo]

Not yet. I believe it is now possible to decode MJPEG in hardware, so actually doing it shouldn't be difficult. ATM I have no MJPEG sources to test with, though. If you could drop one somewhere, I'd appreciate it.

[lestofante]

thank you very much.
this is a link of a raw output from the webcam with "ffmpeg -y -f
video4linux2 -input_format mjpeg -s 1280x720 -i /dev/video0 -vcodec copy
/tmp/web.avi"
https://docs.google.com/file/d/0B2pk_9TX_tqDdUY2RjVjbXRFY0U/edit?usp=sharing

2013/6/1 Dickon Hood [email protected]

Not yet. I believe it is now possible to decode MJPEG in hardware, so
actually doing it shouldn't be difficult. ATM I have no MJPEG sources to
test with, though. If you could drop one somewhere, I'd appreciate it.

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[dickontoo]

I've added what I believe is needed to support it, and I can transcode the samples referred to by http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=19334&start=275#p269992 quite happily, but it won't touch yours, and neither will omxplayer. I expect that once you've managed to get omxplayer to play a stream, omxtx will transcode it. Unfortunately, I have no idea what that may entail.