[mythtv-users] Bit rate oddity?

John P DeVale devale at computer.org
Thu Jun 12 22:52:31 EDT 2003


What exactly are your settings for the MPEG4 codec then?  Could the min 
and max quality settings be causing the unexpectedly large filesize?  Is 
myth even having the compression libraries do variable bit rate?  Is the 
setting then for Min, average, or max bitrate? 

Thanks,

John

Pierre-Olivier Bouchard wrote:

> Albert Santoni wrote:
>
>> With the MJPEG codec, I've noticed that the size of shows are not
>> consistent, even if the length of the show is exactly the same. Is 
>> this a
>> feature of the MJPEG codec?
>
>
> How can something so unhelpful be a feature?
> See if both channels have the same amount of noise, the one that's 
> noisier *will* be bigger. rtjpeg is more sensitive to signal noise 
> than MPEG-4, and its file sizes aren't as constant. With my MPEG-4 
> settings, I get about 217Megs +/- 5 megs per half-hour, whatever the 
> channel or the noise.
>
> Pete
>
>
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