[Ffmpeg-devel] MPEG 2 Quality Issues

Víctor Paesa wzrlpy
Fri Dec 1 09:04:02 CET 2006


> ffmpeg -i TestforMPG-Short.avi -vcodec mpeg2video -minrate 7000k
> -maxrate 7000k -b 7000k -bufsize 5000k -bf 2 -flags +qprd+ildct -flags2
> +ivlc+sgop -mbd rd -sc_threshold 10000000 -lmin 1 -mblmin 1 -lmax
> '340*QP2LAMBDA' -f vob -ab 192 ffmpeg.mpg
> Feel free to add +trell.
> You must know that every encoder around WILL activate qprd. You can
> detect it by using -debug 16, if macroblocks have differents values then
> qprd is activated.
> Always try to use the largest bufsize for rc, the bigger buffer is, the
> more rc will be efficient.

I noticed that ffmpeg -h offers no help for mbd, rd:

-mbd               <int>   E.V..
   rd                      E.V..

Since you have just suggested them, could you please explain in
a few words what they do?

(I'd like to add it to the docs)

Thanks in advance,

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