Sunday, February 13, 2011

ffmpeg and image video conversion

Hi there today I had the need to do several conversions to fit something into something else and finally prepare a DVD ;) so here are some tips to use ffmpeg: 
Turn X images to a video sequence
  ffmpeg -f image2 -i image%d.jpg video.mpg

This command will transform all the images from the current directory (named image1.jpg, image2.jpg, etc…) to a video file named video.mpg.

Turn a video to X images
  ffmpeg -i video.mpg image%d.jpg

This command will generate the files named image1.jpg, image2.jpg, …

The following image formats are also availables : PGM, PPM, PAM, PGMYUV, JPEG, GIF, PNG, TIFF, SGI.

Encode a video sequence for the iPpod/iPhone
  ffmpeg -i source_video.avi input -acodec aac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X final_video.mp4

Explanations :

  • Source : source_video.avi
  • Audio codec : aac
  • Audio bitrate : 128kb/s
  • Video codec : mpeg4
  • Video bitrate : 1200kb/s
  • Video size : 320px par 180px
  • Generated video : final_video.mp4
Extracting sound from a video, and save it as Mp3
  ffmpeg -i source_video.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 sound.mp3

Explanations :

  • Source video : source_video.avi
  • Audio bitrate : 192kb/s
  • output format : mp3
  • Generated sound : sound.mp3
Convert a wav file to Mp3
  ffmpeg -i son_origine.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 son_final.mp3
Convert .avi video to .mpg
  ffmpeg -i video_origine.avi video_finale.mpg
Convert .mpg to .avi
  ffmpeg -i video_origine.mpg video_finale.avi
Convert .avi to animated gif(uncompressed)
  ffmpeg -i video_origine.avi gif_anime.gif
Mix a video with a sound file
  ffmpeg -i son.wav -i video_origine.avi video_finale.mpg
Convert .avi to .flv
  ffmpeg -i video_origine.avi -ab 56 -ar 44100 -b 200 -r 15 -s 320x240 -f flv video_finale.flv
Convert .avi to dv
  ffmpeg -i video_origine.avi -s pal -r pal -aspect 4:3 -ar 48000 -ac 2 video_finale.dv


  ffmpeg -i video_origine.avi -target pal-dv video_finale.dv
Convert .avi to mpeg for dvd players
  ffmpeg -i source_video.avi -target pal-dvd -ps 2000000000 -aspect 16:9 finale_video.mpeg

Explanations :

  1. target pal-dvd : Output format
  2. ps 2000000000 maximum size for the output file, in bits (here, 2 Gb)
  3. aspect 16:9 : Widescreen
Compress .avi to divx
  ffmpeg -i video_origine.avi -s 320x240 -vcodec msmpeg4v2 video_finale.avi
Compress Ogg Theora to Mpeg dvd
  ffmpeg -i film_sortie_cinelerra.ogm -s 720x576 -vcodec mpeg2video -acodec mp3 film_terminée.mpg
Compress .avi to SVCD mpeg2

NTSC format:

  ffmpeg -i video_origine.avi -target ntsc-svcd video_finale.mpg

PAL format:

  ffmpeg -i video_origine.avi -target pal-svcd video_finale.mpg
Compress .avi to VCD mpeg2

NTSC format:

  ffmpeg -i video_origine.avi -target ntsc-vcd video_finale.mpg

PAL format:

  ffmpeg -i video_origine.avi -target pal-vcd video_finale.mpg
Multi-pass encoding with ffmpeg
  ffmpeg -i fichierentry -pass 2 -passlogfile ffmpeg2pass fichierexit-2

ciao Alex

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