[MPlayer-users] How to find "technical differences" in MPEG?

[karl-heinz-1950 at web.de]

> Don't trust the bitrate value printed by MPlayer. It's just read from
> an informative header in the file, and there's no guarantee that the
> muxer put the correct bitrate value there.
> Since 9800 kbps is the highest rate allowed on dvd, a muxer that
> actually says 9800 probably didn't know the bitrate and just played it
> safe by writing that number.
> Any mpg I create with mencoder or ffmpeg has a nominal bitrate of 0 kbps, 
> which is just as obviously wrong as 9800.
> 

How does the player then know "how fast the bits are coming or have to be delivered"? I thought this values tells me how many bit per second I have to read out of the stream. If I read the faster or slower the movie will be faster or slower. Is that the wrong perception?

Thanks,
K.
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