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On Sunday 22 Aug 2004 17:47, Steven M. Schultz wrote:
> On Sun, 22 Aug 2004, Anne Wilson wrote:
> >
> > The m2v was made with
> >
> > lav2yuv coda.eli | yuvscaler -O DVD | yuvdenoise | mpeg2enc -f 9 -b 4500
> > -q 7 - -4 1 -2 1 -o coda.m2v
>
>       Ah, ok - you overrode the default bitrate (which for -f 8 and -f 9
>       is 7500).  So, when you do that you need to specify to 'mplex' the
>       sum of the video and audio bitrates + a small amount for the multi-
>       plexing overhead.  I use 2% as a general guidline.
>
So, if I'd used -f 8 I didn't need a -b setting at all?

>       Thus in your case that would be (4500 + 224) * 1.02 or 4818.  It is
>       quite safe to specify a slightly higher value to mplex, in this case
>       I'd use 4900:
>
Useful to see how you calculate it, thanks.

>       mplex -f 9 -r 4900 -o output m2v mp2
>
OK, I tried that, but the sound is still hopelessly wrong.  In the avi it 
played with just one small hicough near the beginning, but otherwise 
faultlessly.  This is coughing and spluttering all over the place!  Any 
ideas?

>       In general if you get mplex errors like 'too many frame drops' just
>       incrase the -r value a little bit at a time until the errors go away.
>       It's not until you get into the HDTV arena that other limits/problems
>       begin to creep in - not something you'll have to worry about at this
>       time though ;)
>
OK - I'm beginning to understand it ;-)  Thanks

Anne
- -- 
Registered Linux User No.293302
Have you visited http://twiki.mdklinuxfaq.org yet?
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