Easy partial download of mp4 with python and youtube-dl!

$python3 --version
Python 3.7.3

$brew install ffmpeg

$mkdir mp4-download

$cd mp4-download
$python3 -m venv venv
$source venv/bin/activate

$pip install youtube-dl

$ ffmpeg $(youtube-dl -g 'https://www.youtube.com/watch?v=Nyg2qysqgpg' | sed "s/.*/-ss 03:55:00 -i &/") -t 00:01:00 -c copy out.mkv

$ for f in *.mkv;do ffmpeg -i "$f" -c:v copy -c:a aac -b:a 256k -strict -2 "${f%mkv}mp4";done

$ open out.mp4

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