Hi Matti,
> >That depends on what you mean. :) "The maximum useful" GOP size is
> > somewhat smaller than in my GOP size experiment, where I set a GOP size
> > of 1500. It works, the file was even smaller than it normally is, but my
> > machine almost swapped to death while processing the 1500 uncompressed
> > YUV images in memory.
> >
> >:)
That sounds like a decoder defect. THere's no need to buffer an entire GOP
to decode. Only the last and next reference frame.
> >It probably depends on your intended playback target, too, and whether you
> >want to be able to jump in the resultant file or not; you can normally
> > only skip to an I-frame.
>
> Is there a maximum (useful) GOP size for a standalone DVD player?
Depends on what the player's firmware can cope with. Also, you don't want
endless GOPs are otherwise there is a tendency for differences in the iDCT
used by the encoder and the decoder to cause gradually accumulating errors.
In practice the space savings of going to GOPs much bigger than 20-30 are
pretty marginal...
Andrew
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