Ffmpeg Cheatsheet

This is a list of commands for editing video using ffmpeg.

Cut and Fade

Start the video at minute 1, make it last 20 seconds and fade the first and last 4 seconds of audio and video:

ffmpeg \
  # start at minute 1 \
  -ss 00:01:00 \
  # duration 20 seconds \
  -t 20 \
  # input video \
  -i myinvideo.webm \
  # audio fade \
  -af "afade=in:d=4,afade=t=out:st=16:d=4" \
  # video fade \
  -vf "fade=in:d=4,fade=out:st=16:d=4" \
  # output video \
  myoutvideo.webm

Normalize audio

ffmpeg \
  -i myinvideo.webm \
  # integrated loudness (I) -16 \
  # loudness range (LRA) 11 \
  # max true peak (TP) -1.5 \
  -af loudnorm=I=-16:LRA=11:TP=-1.5 \
  myoutvideo.webm

Shift audio

Take the video of file 0 and the audio of file 1, leave the video of file 0 alone and apply the offset to the audio of file 1 and merge them into a new output file

ffmpeg \
  -i myinvideo.webm \
  # delay audio by 1.0 second \
  # negatives are also valid \
  -itsoffset 1.0 \
  -i myinvideo.webm \
  -vcodec copy -acodec copy \
  -map 0:0 -map 1:1 \
  myoutvideo.webm

Trim first n seconds from audio

ffmpeg \
  -i myinaudio.ogg \
  # trim first 10 seconds \
  -ss 10 \
  # copy audio stream \
  -acodec copy \
  myoutaudio.ogg