[XviD-devel] "Automatic" settings

[skal]

	Hi,

On Wed, 2002-11-06 at 22:52, Michael Militzer wrote:

> 
> > dan suggested something like this, an XVID_ENC_RENCODE function,
> > which reencodes the data using a different configuration.
> > the problem is, that quant_type, gmc, and qpel are all vol-based
> > parameters. its unknown whether changing these during a video
> > sequence is permited by the mpeg-4 standard.
> 
> that's true. And even if VOL placement at i-frames only is ok (which I
> believe it is), then features like "modulated quant" are not really possible
> anymore (and adaptive qpel is at least not easy to do...)

	Maybe strict compliance with multi-VOL could be achieved
	inserting a SEQUENCE_END (0x1b1)  (and SEQUENCE_START 0x1b0)
	before each new 'quant-modulating' VOL header.
	Or maybe a VOP_GROUP code (0x1b3) could do the trick, too...

	just my 0.02e
	bye,
		Skal