Video conversion
From Linuxintro
Revision as of 05:36, 5 November 2011 by imported>ThorstenStaerk (→See also)
Contents
convert dv video to avi
dv videos come e.g. from a camcorder.
mencoder test.dv -o test.avi -vf pp=ci <html><acronym title="output audio codec comes from libavcodec">-oac pcm</acronym> <acronym title="output video codec comes from libavcodec">-ovc x264</acronym></html>
| key | possible values |
|---|---|
| -vf | yadif,harddup (deinterlace using yadiff, eliminate duplicate frames); pp=ci (cubic interpolation) |
| -oac (output audio codec) | lavc (libavcodec); libmp3lame; x264 |
| -ovc (output video codec) | list with mencoder -ovc help |
convert video to 3gp
3gp videos come e.g. from a mobile phone.
mencoder INPUTFILE -nosound -ovc lavc -lavcopts vcodec=mpeg4 -vop expand=176:144,scale=176:-2 -o movie.avi -ofps 12
mplayer -vo null -ao pcm -af resample=8000,volume=+4db:sc INPUTFILE
ffmpeg -i movie.avi -i audiodump.wav -b 48 -ac 1 -ab 12 -map 0.0 -map 1.0 OUTPUTFILE
convert 3gp-Video to DivX
mencoder -ovc divx4 vid.3gp -o vid.avi
convert video for Palm
mencoder source.mpg -ofps 15 -srate 24000 -oac mp3lame -lameopts cbr:br=32:vol=5:mode=3 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=96:vhq: \ keyint=300 -vop scale=480:320 -o target.avi
or
mencoder source.mpg -srate 24000 -oac mp3lame -lameopts cbr:br=32:vol5:mode=3\ -fps 30 -ofps 30 -ovc lavc -vop scale=320:240 -o target.avi
Convert a DVD to a file
mencoder dvd://1 -oac mp3lame -lameopts br=192 -ovc lavc -lavcopts vcodec=mpeg4:vhq -o output.avi
Software
Software for converting videos is
TroubleShooting
Sound is out of sync
If you convert a video and sound is out of sync after the conversion, you need to look at
- the video player
- the converter
For example using mencoder made a video with sound out of sync. Using -oac pcm resolved this problem.
