[XviD-devel] Profile@Levels

Christoph Lampert chl at math.uni-bonn.de
Mon Dec 15 15:46:56 CET 2003

On Mon, 15 Dec 2003, ProfDrMorph wrote:
> > Still, what should we do with "illegal" combinations, like too high
> > resolution with Simple Profile? Switch to a compatible combination,
> > like Main Profile at some Level? That could cause decoders to refuse
> > decoding, although it's just a problem of memory, not of features.
> I suggest that XviD should by default be MPEG4-compatible meaning
> switching to a higher profile. Somewhere well hidden in the Advanced
> Options ( maybe the VfW interface should display a user warning the
> first time the user wants to access the Advanced Options ) could be
> an option which allows the user to change XviD's behaviour to creating
> "incorrect" bitstreams when memory (resolution) is the only problem.

Does anyone know how current MPEG-4 ASP (or SP) _software_ decoders behave
with streams of too high profile, like "main"? Do they _try_ to decode at


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