Tag: ffmpeg

Convert MP4 video to MP3 audio with FFmpeg

ffmpeg -i filename.mp4 filename.mp3

fixed bit rate :

ffmpeg -i video.mp4 -b:a 192K -vn music.mp3

variable bit rate :

ffmpeg -i in.mp4 -q:a 0 -map a out.mp3

variable bit rate of 165 with libmp3lame encoder :

ffmpeg -vn -sn -dn -i input.mp4 -codec:a libmp3lame -qscale:a 4 output.mp3
  • -vn disables all video-streams from the input
  • -sn disables all subtitle-streams from the input
  • -dn disables all data-streams from the input
  • -i specifies the input file
  • -codec:a libmp3lame specifies the encoder
  • -qscale:a 4 specifies the quality target for libmp3lame
  • The last argument is the output-file. Note that the file-extension might be used to infer additional information.

References
https://superuser.com/questions/332347/how-can-i-convert-mp4-video-to-mp3-audio-with-ffmpeg
https://superuser.com/questions/1463710/convert-mp4-to-mp3-with-ffmpeg

Convert m2ts to mp4, mp4 to webm, mp4 to ogv using ffmpeg

MP4 TO MP4 (MEDIUM)
ffmpeg -i input.mp4 -b 1000000 output.mp4

M2TS TO MP4
ffmpeg -i input.m2ts -vcodec libx264 -crf 20 -acodec ac3 -vf "yadif" output.mp4

MP4 TO WEBM (HIGH)
ffmpeg -i input.mp4 -aq 5 -ac 2 -qmax 25 -threads 2 output.webm

MP4 TO WEBM (MEDIUM)
ffmpeg -i input.mp4 -aq 5 -ac 2 -qmax 35 -threads 2 output.webm

MP4 TO OGV (HIGH)
ffmpeg -i input.mp4 -vcodec libtheora -acodec libvorbis -q:v 6 -q:a 5 output.ogv

MP4 TO OGV (MEDIUM)
ffmpeg -i input.mp4 -vcodec libtheora -acodec libvorbis -q:v 2 -q:a 4 output.ogv

References
https://gist.github.com/vielhuber/cf918eed2b5cc9eaa63f