extract_audio.md

Download only audio track

youtube-dl -f 141/140/139 --playlist-end 20 'https://www.youtube.com/user/videoscpflcultura/videos'

Convert m4a to mp3

for i in *.m4a; do avconv -i "${i}" -acodec libmp3lame "${i%.m4a}.mp3"; done

Extract audio from mp4 video

for i in *.mp4; do avconv -i "${i}" -map 0:1 -c:a copy "${i%.mp4}.aac"; done

Convert aac to mp3

for i in *.aac; do avconv -i "${i}" -acodec libmp3lame "${i%.aac}.mp3"; done