Video.

Players for linux?

$ sudo apt-get install vlc
$ sudo apt-get install mplayer

Determine video format

$ file $VIDEO
$ mplayer -frames 0 -vo null -ao null -identify $VIDEO
$ ffprobe $VIDEO
$ mediainfo $VIDEO

See:

http://en.gentoo-wiki.com/wiki/Show_Video_Codecs

Show Video Codecs

Make screenshot from video

Seek to desired position with -ss option:

$ ffmpeg -ss 600 -i $IN.avi -vframes 1 $OUT.png

You can apply filters, like resize:

$ ffmpeg -ss 600 -i $IN.avi -vframes 1 -s 320x240 $OUT.png

Extract frames from video

Extract one frame per second:

$ ffmpeg -i $IN.avi -vf fps=1 image-%03d.png

Extract subtitles from video

Find stream id with ffprobe $VIDEO and pass to:

$ ffmpeg -y -i in.mkv -map 0:$ID -f webvtt out.vtt

List of supported by ffmpeg subtitle formats:

$ ffmpeg -formats | grep subt

Integrating subtitles into video

$ ffmpeg -i in.avi -vf subtitles=subtitle.srt out.avi

• https://trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo

Playing 3d film

$ mplayer -vf stereo3d=side_by_side_left_first:anaglyph_red_cyan_color -vo gl $VIDEO
$ mplayer -vf stereo3d=above_below_left_first:anaglyph_red_cyan_color -vo gl $VIDEO

See man 1 mplayer.

Web camera.

View picture from web camera on display screen:

$ mplayer tv://
$ mplayer tv:// -tv driver=v4l2:width=640:height=480:fps=15:device=/dev/video0
$ guvcview
$ cheese
$ camorama

Make screenshot from web camera:

$ ffmpeg -f video4linux2 -i /dev/v4l/by-id/CAMERA -vframes 1 test.jpeg
$ ffmpeg -f video4linux2 -i /dev/v4l/by-id/CAMERA -vframes 4 test%3d.jpeg

Record web camera to a file:

$ mencoder -fps 15 tv:// -ovc lavc -o my.avi
$ guvcview

See:

http://wiki.debian.org/Webcam

Debian wiki.

Extract audio from video file.

$NO - autio strean number:

$ ffmpeg -i $IN -c:a:$NO $OUT.mp3

$ mplayer -ao pcm:fast:file=audio.wav -vc null -vo null  input.avi

Integrate audio to video file.

$ mencoder \
  -ffourcc divx \
  -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=400 \
  -audiofile audio.wav \
  -oac mp3lame -lameopts vbr=3 \
  -o output.avi input.mkv

Synchronise video and audio streams.

$ mencoder -delay 0.7 -oac copy -ovc copy in.avi -o out.avi
$ mencoder -mc 0 -of lavf -lavfopts format=mp4 -oac lavc -ovc lavc \
  -lavcopts aglobal=1:vglobal=1:acodec=libmp3lame:abitrate=128:vcodec=mpeg4:vbitrate=500:keyint=200
  -vf scale=-3:240,crop=320:240,harddup -af lavcresample=44100 -o out.mp4 in.mp4

Convert video for Nokia 5320.

$ mencoder -mc 0 -of lavf -lavfopts format=mp4 \
  -oac lavc -ovc lavc \
  -lavcopts aglobal=1:vglobal=1:acodec=libmp3lame:abitrate=96:vcodec=mpeg4:vbitrate=400:keyint=100 \
  -vf scale=-3:240,crop=320:240,harddup -af lavcresample=44100 -ofps 15 \
  -o out.mp4 in.avi

How convert .3gp to .avi(mpeg)?

$ sudo apt-get install ffmpeg
$ ffmpeg -i test.3gp -f mpegvideo -ar 44100 -ac 1 -acodec mp3 test.mpg
$ for i in `ls -1 *.3gp | cut -d. -f1`; do ffmpeg -y -i $i.3gp -sameq -f mpegvideo -s cif -r 25 -ar 32000 -ac 1 mpegs/$i.mpg; done
$ ffmpeg -i video-in.3gp -b 250 -s 160×120 -r 15 -f avi -an video-out.avi
$ mencoder -oac mp3lame -ovc lavc -o video-out.avi -vf pp,2xsai,scale video-in.3gp
$ mencoder -o video-in.avi -vf pp,2xsai,scale -ovc lavc video-out.3gp
$ mencoder -o video-in.avi -vf rotate=2 -oac pcm -ovc divx4 video-out.3gp

You need to compile FFmpeg with AMR support (--enable-amr_nb --enable-amr_wb).

AMR WB FLOAT NOTICE ! Make sure you have downloaded TS26.204 V5.1.0 from http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-510.zip and extracted the source to libavcodec/amrwb_float

AMR NB FLOAT NOTICE ! Make sure you have downloaded TS26.104 REL-5 V5.1.0 from http://www.3gpp.org/ftp/Specs/latest/Rel-5/26_series/26104-5??.zip and extracted the source to libavcodec/amr_float and if u try this on an alpha, u may need to change Word32 to int in amr/typedef.h

Video editors.

$ sudo apt-get install pitivi kino

See:

http://www.pitivi.org/

pitivi home page.

http://www.kinodv.org/

Kino home page.