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

[Matthias Czapla]

On Fri, Feb 06, 2004 at 01:16:28AM -0800, Corey Hickey wrote:
> Matthias Czapla wrote:
> > Hello!
> > 
> > Just out of curiosity I wonder whats causing mencoder to skip frames (the
> > resulting AVI plays fine) 
> > 
> > $ nice -19 mencoder -oac copy -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_dvd_image.bin dvd://1
> > 
> > MEncoder 1.0pre3-2.95.4 (C) 2000-2003 MPlayer Team
> > 
> > CPU: Intel Celeron 2/Pentium III Coppermine,Geyserville 1094 MHz (Family: 6,
> > Stepping: 6)
> > Detected cache-line size is 32 bytes
> > CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 0
> > Compiled for x86 CPU with extensions: MMX MMX2 SSE
> > 
> > Reading /home/lal/.mplayer/codecs.conf: Can't open
> > '/home/lal/.mplayer/codecs.conf': No such file or directory
> > Reading /usr/local/etc/mplayer/codecs.conf: Can't open
> > '/usr/local/etc/mplayer/codecs.conf': No such file or directory
> > Using built-in default codecs.conf.
> > AVI file format detected.
> > VIDEO:  [FrNo]  720x576  24bpp  25.000 fps    0.8 kbps ( 0.1 kbyte/s)
> > Using pass3 control file: frameno.avi
> 
> Do you still have the same problem if you use 2-pass (or 1-pass) instead
> of 3-pass? I never use 3-pass myself, but as far as I understand from
> reading this list, 3-pass encoding is in a state of
> "rather-broken-even-though-it-works-some-of-the-time".

I wouldn't say "problem" because the resulting file plays just fine (at
least for me) :)
But it keeps skipping frames when I do the following without any frameno.avi
lying around:

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

BTW, it doesnt skip frames when playing the image with mplayer.

Regards
Matthias