Whenever I'm trying to decode file encoded with alpha channel according to FFMPEG documentation (https://trac.ffmpeg.org/wiki/Encode/VP8#AlphaChannel) using humble-video - the frame pixel format defaults to yuv420p, and alpha channel is lost. Video plays correctly in chromium browser, so it is not an encoding mistake.
Also MediaPictureConverterFactory only supports RGB and BGR target frame format, so I needed to implement my own converter.
Whenever I'm trying to decode file encoded with alpha channel according to FFMPEG documentation (https://trac.ffmpeg.org/wiki/Encode/VP8#AlphaChannel) using humble-video - the frame pixel format defaults to yuv420p, and alpha channel is lost. Video plays correctly in chromium browser, so it is not an encoding mistake.
Also MediaPictureConverterFactory only supports RGB and BGR target frame format, so I needed to implement my own converter.
How to correctly deal with alpha channeled video?