Difference between revisions of "Video conversion"
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mencoder dvd://1 -oac mp3lame -lameopts br=192 -ovc lavc -lavcopts vcodec=mpeg4:vhq -o output.avi | mencoder dvd://1 -oac mp3lame -lameopts br=192 -ovc lavc -lavcopts vcodec=mpeg4:vhq -o output.avi | ||
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= TroubleShooting = | = TroubleShooting = | ||
Revision as of 04:44, 22 March 2012
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. To list all available audio codes, call mencoder -oac help.">-oac pcm</acronym> <acronym title="Output video codec comes from libavcodec. To list all available codecs, call mencoder -ovc help.">-ovc x264</acronym></html>
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
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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.
