[MPlayer-users] Aspect-ration oddity
Meino Christian Cramer
Meino.Cramer at gmx.de
Sun Apr 2 14:38:14 CEST 2006
Hi,
I have a video, which was recorded by a Siemens m740 dvbt-receiver (TV).
This video has been cut and freed of the commercials and mplayer is
able to play it without any problems.
The video itsself has an aspect ratio of 4:3 and has no "black bars"
on top and bottom.
Now.... :)
I encoded this video from the mpeg2 into the mpeg4 codec to save
space. Before that I let mplayer guess the crop values. The scenes of
the video were bright enough to for a correct detection and finally
it comes out with 704:576.
While playing the resulting video, I recognized that the aspect
ratio was wrong (egg-head syndrom).
I added -aspect 4:3 but this does not help neither while playing nor
while encoding.
Now I get stuck...
The commandline I used for encoding was (I alos tried without "-aspect 4:3"
mencoder ${filename} -aspect 4:3 -ovc lavc -lavcopts \
vcodec=mpeg4:vbitrate=1200:vhq:vpass=1 -oac mp3lame -lameopts \
abr:br=96 -vf crop=704:576:0:0 -o file-compressed.avi && \
mencoder ${filename} -aspect 4:3 -ovc lavc -lavcopts \
vcodec=mpeg4:vbitrate=1200:vhq:vpass=2 -oac mp3lame -lameopts \
abr:br=96 -vf crop=704:576:0:0 -o file-compressed.avi
My system:
Linux 2.6.16.1 (Gentoo)
Mplayer/Ffmpeg from daily cvs
Any help would be ver yappreciated!
Thank you very much in advance!
Keep hacking!
mcc
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