- Any way extract usm video with alpha channel? by mizuka at 7:40 AM EDT on May 12, 2021
- The source usm file use vp9 encode, and the result of m2v file drop the alpha channel, is there any way to change the m2v's background or make it transparent?
- by bnnm at 10:37 AM EDT on May 14, 2021
- Alpha channel in .usm is stored separate from video, but I'm not sure how it could be used.
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