原因
ffmpeg: Unknown decoder 'copy' #13にあるように、-iオプションの前にエンコードオプションをつけると発生する
解決策
誤
/usr/bin/ffmpeg -vcodec copy -acodec copy -i "input.mp4" "output.mp4"
正
/usr/bin/ffmpeg -i "input.mp4" -vcodec copy -acodec copy "output.mp4"
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FFMPEGで「Unknown decoder 'copy'」と出る場合はoptionの指定順序がおかしい
Last updated at Posted at 2019-09-28
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