FFmpeg
echo 'apt-get update;echo;apt list -a --upgradable;apt-get upgrade -y'|sudo bash
echo 'apt-get install -y ffmpeg'|sudo bash
Playground
mkdir -p ~/Documents/ffmpeg-playground
cd ~/Documents/ffmpeg-playground
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for webm in *.webm;do echo ${webm%.*}; done
for webm in *.webm;do echo ${webm##*.};done
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ffmpeg -hide_banner -loglevel error -h
ffmpeg -v error -h
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for webm in *.webm;do ffmpeg -v error -i "${webm}" -qscale 0 "${webm%.*}.mp4"; done
for webm in *.webm;do ffmpeg -v error -i "${webm}" "${webm%.*}.mp4"; done
for mp4 in *.mp4; do ffmpeg -v error -i "${mp4}" "${mp4%.*}.mp3"; done
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References
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