[MEncoder-users] mencoder apparently not obeying video bitrate settings

Eric Anopolsky erpo41 at gmail.com
Mon Jul 21 15:08:12 CEST 2008


On Mon, 2008-07-21 at 03:28 -0700, tripp wrote:
> > output (in particular, the video bitrate of the output is too low) 
> 
> you can force it,
> vbitrate=8000:vrc_minrate=8000:vrc_maxrate=8000:vrc_buf_size=1835
> 
> you'll get padding.

Ok, this produces output of the expected size. I will burn it and test
it later. Provided that this fixes the problem, I have another question:
given that the mencoder command

/usr/bin/mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd:tsaf
-ofps 24000/1001 -vf expand=576:324:0:10,scale=720:480,harddup -lavcopts
vcodec=mpeg2video:trell:mbd=2:sc_threshold=1000000000:cgop:vstrict=0:vrc_maxrate=8476:vrc_buf_size=1835:vbitrate=8000:keyint=15:acodec=ac3:abitrate=224:aspect=16/9 -o /home/eric/movie_01_01.mpg input.avi

run by DeVeDe produces output that confuses DVD players, is mencoder in
the wrong for producing output that does not conform to the
specifications given to it on the command line, or is DeVeDe in the
wrong for giving mencoder specifications that do not match DVD video
standards? Which program needs a bug report?

> > The subjective quality of the input shouldn't affect 
> > the encoder's ability to do this, should it?
> 
> the quality of input,
> certainly should.

This is counter-intuitive to me, but oh well.

Cheers,
Eric

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