[Ffmpeg-devel] Re: [PATCH] VC1 init fail and crash

[bond]

> Christian Iversen wrote:
> > On Tuesday 27 June 2006 18:34, Reimar D?ffinger wrote:
> >> Hi,
> >> attached patches fix two minor problems:
> >> 1) vc1 (not wmv3) decoder init fails due to a missing case in h263dec
> >
> > What's the relation between vc1 and wmv3? Different muxing? None at all?
> > Related codecs?
>
> WMV3 came first and then turned into VC-1 as a standard. Ideally,
> they're supposed to be bitstream compatible but in practice there are
> likely to be some differences.

wmv9/3 is an implementation of vc-1

wmv9 simple, main and advanced profile are 100% compatible to the vc-1
standard

there used to be a wmv9 advanced profile codec before vc-1 has been
finalized which is incompatible to vc-1 (simple and main profile were always
was compatible). m$ itself has abandoned this incompatible advanced profile
encoder so its basically dead