[MPlayer-users] xvid: cropping black borders and fixing aspect
Aaron Peterson
dopplecoder at gmail.com
Fri Apr 1 03:14:30 CEST 2005
> > It was playing at 480x480 and everyone had tall person syndrome.
> > using -aspect 4:3 seemed to look right,
> > It was playing at 480x480 and everyone had tall person syndrome.
> > using -aspect 4:3 seemed to look right, so this is what seemed to fix
> > the aspect and borders okay:
> >
> > mencoder -oac copy -ovc lavc -lavcopts vcodec=mpeg4:trell:mbd=2 \
> > -vf scale=480:380,crop=480:208:0:86 \
> > -o "$(basename $f .avi).new.avi" "$f"
>
> Sounds like SVCD video. A hardware player would assume 4/3 aspect, and play it back properly.
>
> > I'm a little worried about losing quality by re-encoding though. Do
> > you think the degradation will be noticeable?
>
> If you're doing single-pass encoding, yes, especially in high-motion scenes, it will. With 2-passes, it will look much better. You also need to specify a bitrate, it just defaults to 800 and you might want something higher.
>
> In the future, do not reply off-list.
Hah! I stink at this mailing list thing I guess. Sorry again.
The original file is an .avi with XviD video and mp3 audio strangely
enough, so I don't think it was intended for VCD. Perhaps the person
doing the encoding just didn't ask for help on this list :-)
Thanks again for your advice, I'll specify a higher bitrate and do two
pass encoding.
Aaron
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