[MPlayer-dev-eng] help, uncompressable video stream

[Michael Niedermayer]

Hi

On Friday 21 March 2003 05:10, Joey Parrish wrote:
> On Thu, Mar 20, 2003 at 10:09:26AM +0100, Michael Niedermayer wrote:
> > hmm what filesize do u get for each of the following, 2.6G is really a
> > bit huge, perhaps its a bug ...
> > -lavcopts vcodec=mpeg4:vqscale=31
> > -lavcopts vcodec=mpeg4:vhq:vbitrate=400
> > -lavcopts vcodec=mpeg4:vqscale=31 -ssf lgb=1 -ssf cgb=2 -vop scale
> > -lavcopts vcodec=huffyuv:vstrict=-1:vpass=1:pred=2
> > -lavcopts vcodec=huffyuv:vstrict=-1:vpass=2:pred=2
>
>             ^^^^^^^^^^^^^^
> 	    Please add this to the manpage!!  I never tried it because
> 	    it's not documented under vcodec.
done

>
> Okay, here are the results for a very few frames. (100 from the middle.)
> I will run it on a larger sample later, but I have a very slow computer
> and very little drive space left.  So, for 100 frames (3.3s at 680x332):
>
> -lavcopts vcodec=mpeg4:vqscale=31   3.3M
> -lavcopts vcodec=mpeg4:vhq:vbitrate=400    15M
> -lavcopts vcodec=mpeg4:vqscale=31 -ssf lgb=1 -ssf cgb=2 -vop scale   696k
> -lavcopts vcodec=huffyuv:vstrict=-1:vpass=1:pred=2   8.0k
> -lavcopts vcodec=huffyuv:vstrict=-1:vpass=2:pred=2    14M
>
> The blurred version is smaller, but the blur makes the use of ascii
> unrecognizable, which defeats the purpose of using it.  :)
u could try less blurring -ssf lgb=0.5 -ssf cgb=1, ...

>
> The huffyuv pass1 version produced garbage.  Is this normal?
yes

> http://joey.nicewarrior.org/huff.jpg (cropped, lq, ~10kb)
>
> The huffyuv pass2 version looked normal.
>
> 1Mb per second seems to be our best result so far without blurring the
> video stream.  Does this tell you anything useful?  Do you think it's a
> bug, or have I just tried to do something silly?
its a bit strange that vbitrate=400 is so much larger than vqscale=31
could u upload the divx2pass.log from 
-lavcopts vcodec=mpeg4:vhq:vbitrate=400:vpass=1

[...]

Michael