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Encode alpha video to WebM ? #9

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juntaosun opened this issue Feb 26, 2023 · 1 comment

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juntaosun commented Feb 26, 2023

Chrome 31 now supports video alpha transparency in WebM.
"webm-muxer" How to Encoder alpha videos ?

VideoEncoderConfig：
alpha: 'keep', // keep alpha channel

It doesn't work

Owner

Vanilagy commented Mar 1, 2023

Added a config option to enable flagging the video as containing alpha data. However, as it seems, Chromium itself does not support encoding alpha video as of today: https://chromium.googlesource.com/chromium/src/+/00d126142a32c598a0874ef80ba27a3591cd2b2c/third_party/blink/renderer/modules/webcodecs/video_encoder.cc#187

Nothing I can do about that. Bummer!

Vanilagy closed this as completed

Vanilagy added the help wanted label

akre54 mentioned this issue

Support transparency / alpha by encoding stream #19

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