On Fri, 7 Jan 2005, Steven M. Schultz wrote:
> > Dik Takken <[EMAIL PROTECTED]> écrivait :
> >
> > > quality and uses all available bitrate. That's why I'm currently
> > > forced to use transcode for fully automated mpeg2 encoding. Transcode
> > > automatically finds all optimal encoder settings and uses all
> > > available bitrate.
The thought came to me after I sent my previous suggestion...
Transcode is NOT automatically finding optimal encoder settings at all.
All transcode is doing is either 1) relying on the old (undocumented)
behaviour of "cbr" for generic MPEG-2 or 2) specifying "--cbr". MPEG2
encoding is always vbr now unless cbr is specifically requested.
You can achieve the exact same thing that transcode is doing by
replacing "-q N" with "--cbr" (if you're using the cvs version of
mjpegtools).
It does sound though like you're aiming at a specified size and if so
then you'll need to hold the bitrate constant and vary the quality.
Vbr works the other way - holds the quality constant but varies the
bitrate ;)
Cheers,
Steven Schultz
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