On Wed, 2007-03-21 at 17:26 +0100, Bernhard Praschinger wrote:
> The other thing would be use a -q of 4 or 5, that also seems to solve 
> the problem.
> 

I fetched a mjpegtools CVS a little while ago. I tried this

mpeg2enc -f 8 -D 10 -E -10 -4 1 -2 1 -c -q 5 -o special.m2v

I let it run for 10,000 frames. When I stopped it, the m2v file size was
158 Megabytes. About half what it should be. 

As the mpeg2enc info lines were scrolling by, I saw LOTS of q='s that
were in the 20, 30, 40, and 50 range. That seems to start after it had
processed maybe 3,000 frames. Then it was back and forth from 5.00 back
to the higher numbers. I even saw one q= that was over 100.

The source I'm using is a Directv satellite receiver connected via
S-Video to a Canopus ADVC-110 and captured in raw DV format using
dvgrab. Since the source quality is fairly high, I normally use -q 3 or
-q 4.

Looks like I'll be using the older 1.9.0 CVS for the time being.



Stan



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