[MPlayer-users] Using mplayer/mencoder/ogmtools to make an ogm

D Richard Felker III dalias at aerifal.cx
Tue Oct 21 02:14:20 CEST 2003


On Mon, Oct 20, 2003 at 11:16:34PM +0200, Vladimir Niksic wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> I have a question about the video bitrate used in movies. If I 
> decompress the AC3 sound with mplayer to pcm, and then encode it to ogg, 
> I have a problem with setting the video bitrate. If I use similar 
> bitrates with ogg and mp3, and then use the video recommendation bitrate 
> that I got from the first pass, and use ogmmerge to dump the mp3 and put 
> the ogg audio file in it's place, it is always screwed up. Either I get 
> 705+ mb movie, or 680-. Is there a calculator around, so I can calculate 
> the video bitrate that is optimal?

Nothing beats a desk calculator, a pen and paper, echo $[...], or just
some quick computations in your head. Bitrate is a very simple
concept. If you've taken any highschool quantitative science classes
(chem or physics) or any highschool mathematics you should be able to
work it out.

Rich



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