User:Prospectprospekt
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Projects[edit]
- Chinese films from 1922 to 1945
- classical music recordings
vp9 ffmpeg command[edit]
A synthesis of video2commons, Help:Converting video, and the VP9 Encoding Guide. video2commons uses crf 20 and b:a 128k, which is described by the Opus recommended settings page as "pretty much transparent".
Linux and macOS[edit]
ffmpeg -i -c:v libvpx-vp9 -b:v 0 -crf 20 -pass 1 -row-mt 1 -an -f null -y /dev/null && \ffmpeg -i -c:v libvpx-vp9 -b:v 0 -crf 20 -pass 2 -row-mt 1 -c:a libopus -b:a 128k output.webm
Windows[edit]
ffmpeg -i -c:v libvpx-vp9 -b:v 0 -crf 20 -pass 1 -row-mt 1 -an -f null -y NUL && ^ffmpeg -i -c:v libvpx-vp9 -b:v 0 -crf 20 -pass 2 -row-mt 1 -c:a libopus -b:a 128k output.webm
av1 ffmpeg command[edit]
WIP