FFmpeg supports most of the popular formats, we don’t need to worry a lot about that. Formats supported by FFmpeg include MPEG, MPEG-4 (Divx), ASF, AVI, Real Audio/Video and Quicktime. To see a list of all the codecs/formats supported by FFmpeg, run the following command:
ffmpeg -formats
1. X11 grabbing
FFmpeg can grab the X11 display.ffmpeg -f x11grab -s cif -i :0.0 /tmp/out.mpg
ffmpeg -f x11grab -s cif -i :0.0+10,20 /tmp/out.mpg
ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/outputFile.mpg
2. Convert Pictures To Movie
First, rename your pictures to follow a numerical sequence. For example, img1.jpg, img2.jpg, img3.jpg,… Then you may run:ffmpeg -f image2 -i img%d.jpg /tmp/a.mpg
`img%03d.jpg' means the sequence `img001.jpg', `img002.jpg', etc…
If you have large number of pictures to rename, you can use the following command to ease the burden. The command, using the bourne shell syntax, symbolically links all files in the current directory that match
*jpg
to the `/tmp' directory in the sequence of `img001.jpg', `img002.jpg' and so on.x=1; for i in *jpg; do counter=$(printf %03d $x); ln "$i" /tmp/img"$counter".jpg; x=$(($x+1)); done
$(ls -r -t *jpg)
in place of *jpg
.Then run:
ffmpeg -f image2 -i /tmp/img%03d.jpg /tmp/a.mpg
3. Video Conversions
Quick and dirty convert to flvffmpeg -i inputfile.mp4 outputfile.flv
Convert .flv to .3gp
ffmpeg -i file.flv -r 15 -b 128k -s qcif -acodec amr_nb -ar 8000 -ac 1 -ab 13 -f 3gp -y out.3gp
Convert AVI to iPhone MP4
ffmpeg -i [source].avi -f mp4 -vcodec mpeg4 -b 250000 -s 480?320 -acodec aac -ar 24000 -ab 64 -ac 2 [destination].mp4
ffmpeg -i source-xvid.avi -s 480x320 -aspect 4:3 -b 768k -ab 64k -ar 22050 -r 30000/1001 OUT.mp4
ffmpeg -i source-xvid.avi -s 480x320 -aspect 16:9 -b 768k -ab 64k -ar 22050 -r 30000/1001 OUT.mp4
ffmpeg -i mymovie.mpg -ar 22050 -acodec libmp3lame -ab 32K -r 25 -s 320x240 -vcodec flv mytarget.flv
The -r 25 sets the frame rate for PAL, for NTSC use 29.97
4. Audio Conversion
Convert RM file to mp3ffmpeg -i input.rm -acodec libmp3lame -ab 96k output.mp3
Converting WMV to MP3 using FFMPEG
ffmpeg -i audio1.wmv audio1.mp3
Converting WMV to FLV using FFMPEG
ffmpeg -i audio1.wmv audio1.flv
Converting AMR to MP3 using FFMPEG
ffmpeg -i audio1.amr -ar 22050 audio1.mp3
Converting aac to mp3 using FFMPEG
ffmpeg -i audio1.aac -ar 22050 -ab 32 audio1.mp3
Converting aac to mp3 using FFMPEG with MetaData
ffmpeg -i audio1.aac -ar 22050 -ab 32 -map_meta_data audio1.mp3:audio1.aac audio1.mp3
5. Audio Extraction
ffmpeg -i video.avi -f mp3 audio.mp3
ffmpeg -i input.flv -f mp3 -vn -acodec copy ouput.mp3
6. Record Audio and Video from webcam
To record video run ffmpeg with arguments such as these:ffmpeg -f video4linux2 -s 320x240 -i /dev/video0 out.mpg
ffmpeg -f oss -i /dev/dsp -f video4linux2 -s 320x240 -i /dev/video0 out.mpg
7. Copy Only A Part Of Video
Cut out a piece of film from a file. Choose an arbitrary length and starting time.ffmpeg -vcodec copy -acodec copy -i orginalfile -ss 00:01:30 -t 0:0:20 newfile
copy, you choose the video encoder that just copies the file.
-acodec, you choose what audio codec the new file should be encoded with.
copy, you choose the audio encoder that just copies the file.
-i originalfile, you provide the filename of the original file to ffmpeg
-ss 00:01:30, you choose the starting time on the original file in this case 1 min and 30 seconds into the film
-t 0:0:20, you choose the length of the new film
newfile, you choose the name of the file created.
8. Join Multiple Video Files
A few multimedia containers (MPEG-1, MPEG-2 PS, DV) allow to join video files by merely concatenating them.Hence you may concatenate your multimedia files by first transcoding them to these privileged formats, then using the humble
cat
command (or the equally humble copy
under Windows), and finally transcoding back to your format of choice.mkfifo orig1.mpg mkfifo orig2.mpg ffmpeg -i input1.avi -sameq -y orig1.mpg ffmpeg -i input2.avi -sameq -y orig2.mpg
cat orig1.mpg orig2.mpg | ffmpeg -f mpeg -i - -vcodec copy -acodec copy merged.mpg
cat orig1.mpg orig2.mpg | ffmpeg -f mpeg -i - -sameq -vcodec mpeg4 -acodec libmp3lame merged.avi
Also notice that you may avoid the huge intermediate files by taking advantage of named pipes, should your platform support it:
9. Removing Synchronization Problems Between Audio and Video
ffmpeg -i source_audio.mp3 -itsoffset 00:00:10.2 -i source_video.m2v target_video.flv
To extract the original video into a audio and video composites look at the command on extracting audio and video from a movie
Here is more information of how to use ffmpeg:
http://www.ffmpeg.org/ffmpeg-doc.html
ffmpeg is a multiplatform, open-source library for video and audio files. Useful and amazing commands covering almost all needs: video conversion, sound extraction, encoding file for iPod or PSP, and more.
Getting infos from a video file
ffmpeg -i video.avi
Turn X images to a video sequence
ffmpeg -f image2 -i image%d.jpg video.mpgThis 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.jpgThis 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.mp4Explanations :
- 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
Encode video for the PSP
ffmpeg -i source_video.avi -b 300 -s 320x240 -vcodec xvid -ab 32 -ar 24000 -acodec aac final_video.mp4Explanations :
- Source : source_video.avi
- Audio codec : aac
- Audio bitrate : 32kb/s
- Video codec : xvid
- 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.mp3Explanations :
- 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.dvOr:
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.mpegExplanations :
- target pal-dvd : Output format
- ps 2000000000 maximum size for the output file, in bits (here, 2 Gb)
- 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.mpgPAL 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.mpgPAL format:
ffmpeg -i video_origine.avi -target pal-vcd video_finale.mpg
Multi-pass encoding with ffmpeg
ffmpeg -i fichierentree -pass 2 -passlogfile ffmpeg2pass fichiersortie-2
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