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Written by Oleksandr Gavenko (AKA gavenkoa), compiled at 2015-10-05
from rev 764bb173578d
.
Video.¶
Contents
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
$ mediainfo $VIDEO
See:
- http://en.gentoo-wiki.com/wiki/Show_Video_Codecs
- Show Video Codecs
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
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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 screenshort 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.