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A comment on Chromium: Add support for Animated PNG. Parent comment

Re:Chromium: Add support for Animated PNG by jjuuolkkju on Tuesday March 14, 2017 @08:31PM (#13872878)
lossless compression and transparency.
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Re:Chromium: Add support for Animated PNG by discreditable on Wednesday March 15, 2017 @08:36AM (#13875639)
vp9 supports both of those.

Alpha channel demo: https://simpl.info/videoalpha/

In ffmpeg, the -lossless 1 parameter gives you a lossless encode. I don't use it much because mp4 lossless (-qp 0) has better compression and is faster.

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