[FFmpeg-devel] VC-1 interlaced stream support

Kostya kostya.shishkov
Sat Feb 7 08:46:05 CET 2009

On Fri, Feb 06, 2009 at 08:28:50PM -0800, Stephen Warren wrote:
> I'd like to perform some testing of interlaced streams using ffmpeg/MPlayer
> and VDPAU. However, I believe that ffmpeg will currently refuse to decode
> any interlaced VC-1 streams because they aren't supported.

> My question is: Which parts of interlaced streams aren't supported. Is it
> just the actual pixel manipulations (IDCT, MoCo, ...) that are missing, or
> are parts of surface management and/or picture/field header parsing missing
> too?
> I'm hoping that since with VDPAU all the low-level bitstream parsing and
> actual decode work is performed by VDPAU and not ffmpeg, I should be able to
> persuade ffmpeg to hand off the frames easily.
> Does anyone have any thoughts on this?

Almost everything for handling interlaced data is missing - including header
parsing. And since FFmpeg developers are all evil I'm not sure I allow handling
interlaced content solely by some third-party SW/HW without decent support in
native lavc decoder.

> Thanks.
> -- 
> nvpublic

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