garageCube

I am trying to use webm VP9 files with alpha in MadMapper, the alpha channel works fine in the browser and other apps supporting VP9, but ends up as black in MadMapper. I am converting my files with ffmpeg and tried both standard and yuva420p pixel format.
Is VP9 transparency supported at all in MadMapper?

Can you share a sample file ? (you can share it in PM)
That must be easy to fix.
at the moment you can convert your file to HapQ Alpha with ffmpeg or Adobe, or ProRes 4444.