[Libav-user] Which video codecs support alpha?

[Carl Eugen Hoyos]

killkenny64 <kennethjjgibson at ...> writes:

> What format and container would be best to create a video with alpha?

I cannot answer this question, but the question in the subject:
ffv1, qtrle, png, libopenjpeg and nearly all image formats.

> Would this format cause any problems when overlaying it?

> Is h264 the only one?

I don't think h264 supports alpha (at least x264, the only 
encoder FFmpeg can use, does not support it).

Carl Eugen