[MPlayer-dev-eng] [DOCS] question: tvinput.xml

[D Richard Felker III]

On Sun, Apr 20, 2003 at 07:58:36PM +0200, Arpi wrote:
> Hi,
> 
> > Just was translating and found such a strange thing (in a third example
> > of capturing):
> > mencoder -tv on:driver=v4l:width=768:height=576 \
> >      -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=900 \
> >      -oac mp3lame -lameopts cbr:br=64 \
> >      -vf crop=720:544:24:16,pp=lb -o output.avi
> >    ^^^^^^^^^^^^^^^^^^^^^^^
> > 
> > My question is: Mustn't it be so:
> > -vf  pp=lb,crop=720:544:24:16
> > ?
> 
> 'lb' is a deinterlacer, which doesn't need teh qscale info, so it works
> after crop/expand like transdormations (but doens't work after scale!)
> and putting it after crop is even faster as it doens't have to process the
> image parts being cropped out.

It can be used after scale if you're only scaling horizontally (very
common for anime which needs to be scaled from 720x480 to 640x480) or
if you're just using it as a lowpass filter rather than a
deinterlacer.

Rich