MEncoder

„MEncoder is a free command line video decoding, encoding and filtering tool released under the GNU General Public License. It is a close sibling to MPlayer and can convert all the formats that MPlayer understands into a variety of compressed and uncompressed formats using different codecs.“

MEncoder. (2008, February 23). In Wikipedia, The Free Encyclopedia. Retrieved 18:57, April 5, 2008, from
http://en.wikipedia.org/w/index.php?title=MEncoder&oldid=193447614


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Monday, July 21, 2008

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

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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