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ffmpeg is a tool for editing movie files.


Convert container format

for X in *.mov ; do ffmpeg -i "${X}" -c copy -map 0 "${}.mp4" ; done ;

Time Lapse

Generate a movie from an image sequence like 001.jpg-999.jpg

ffmpeg -r 10 -b 1800 -i %03d.jpg test1800.mp4

Rename files as a sequence:

i=0 ;
find . -type f |
  while read -r F ; do
    let i=${i}+1 ;
    fn=$(printf %06d ${i}) ;
    mv "${F}" "${fn}.jpg" ;
  done ;

Sample some of the middle of the time-lapse

ffmpeg -pattern_type sequence -start_number 3000 -r 30 -i %06d.jpg -s 1440x1080 -frames 120 "$(date +%F_%T).mp4"

Turn these images into a video

ffmpeg -pattern_type sequence -r 30 -i %06d.jpg -s 1440x1080 "$(date +%F_%T).mp4"

Audio Replace

Replace the audio of DSC_4436.AVI with 01 Gymnopedie 1.mp3 and limit the duration of the output so the music doesn't play beyond the end of the video.

ffmpeg -t 00:00:47.99 -i DSC_4436.AVI -i "01 Gymnopedie 1.mp3" -map 0:0 -map 1:0 -vcodec copy -acodec copy output.AVI

Slow down video to half speed, drop audio

ffmpeg -i DHO_8751.MOV -an -vf "setpts=(2/1)*PTS" output.mp4

Extract two seconds worth of frames at 24fps starting at 15m

ffmpeg -i movie.mkv -r 24 -t 00:00:02.00 -ss 00:15:00 temp/movie-%4d.jpg

Detect errors in files

ffmpeg -v error -i 20091024-08-46-00.mpg -f null - 2>> error.log