[MPlayer-users] Why is it "Skipping frame!"s?

[D Richard Felker III]

On Sat, Feb 07, 2004 at 04:51:05AM +0100, Amadeus wrote:
> > > for i in 1 2; do
> > >         nice -19 mencoder -aid 128 -oac pcm -ovc lavc \
> > > 	-lavcopts vcodec=mpeg4:mbd=2:trell:vbitrate=509:vpass=$i \
> > > 	-sws 2 -vf crop=672:316:24:130,scale=544:240 \
> > > 	-dvd-device some_image.bin dvd://1
> > > done
> 
> Pretty neat loop trick there=)
> 
> You can save a lot of time by dumping the first pass to /dev/null.
> This way you won't have to write the pass1 encoding to the harddisc, which is
> a slow process.
> 
> Not tested, but this just might work:
> 
> 
> for i in 1 2; do
> for j in /dev/null filename.avi; do
>          nice -19 mencoder -aid 128 -oac pcm -ovc lavc \
>      -lavcopts vcodec=mpeg4:mbd=2:trell:vbitrate=509:vpass=$i \
>      -sws 2 -vf crop=672:316:24:130,scale=544:240 \
>      -dvd-device some_image.bin dvd://1
>      -o $j
>  done
> done

ROTFL, this will do both passes twice! :) Not quite what you had in
mind....hehe.

Anyway the hd access time won't really have much impact unless you're
encoding _very_ low resolution and low quality at high bitrates. I
usually like to be able to preview the first pass to make sure a/v
sync is ok and stuff before spending time on the second. If you really
want your method to work, though, you could change it to -o $i.avi and
make 1.avi a symlink to /dev/null... :) Or make a fancier script.

Rich