[Ffmpeg-devel] [BUG] VC-1 Main Profile distortions

Kostya kostya.shishkov
Wed Jul 26 06:25:46 CEST 2006

On Tue, Jul 25, 2006 at 09:04:16PM +0200, bond wrote:
> i dunno whether its already wanted to report vc-1 decoding bugs, but i cant

Yes, if that's a bug.
> keep this one back (having followed the development recently):
> download this sample (main profile) and watch the letters while playing, its
> pretty easy to see whats wrong:
> http://download.remedygames.com/movies/AlanWake_1500kbps.wmv

You mean ghosted edges? That's known issue.
> ---
> another thingie:
> i have some m$' wmv9 encoded samples that are main and simple profile for
> that ffmpeg reports the reserved RES_RTM_FLAG to be set to 0. it seems the
> vc-1 specs require this to be always set to 1. does this mean that wmv9
> simple/main profile can also produce non-vc-1 compliant streams? or is this
> a glitch in ffmpeg?
Of course it can - that's old WMV3 version which hadn't went to standard.
See http://codecs.multimedia.cx/?p=31 for some details.

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