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Is transparency still supported for webms? I made some that rendered fine in Chrome and Firefox but when posted to 4chan the transparency vanished (the colorkey/chromakey color was still in the background, as if the alpha channel was stripped upon posting).
If it's still supported, what ffmpeg command you usually use? Thanks.
If not, it is a consequence of the /g/ yab where they were embedding CP links into webm title metadata?
