[Ffmpeg-devel] [PATCH] GUID is defined in the Windows API (DirectShow)

Michael Niedermayer michaelni
Thu Mar 2 15:56:01 CET 2006


On Wed, Mar 01, 2006 at 05:15:35PM -0800, Corey Hickey wrote:
> Rich Felker wrote:
> >>may i replace libmpdemux by libavformat then? :))))))
> > 
> > 
> > Well, I'd be happy if we can do it at some point. Does lavf work
> > better than libmpdemux for all formats yet? What about performance? Is
> > there any hope of being able to implement zerocopy demuxing with lavf?
> > (libmpdemux does not do zerocopy but in theory a zerocopy demuxer with
> > mmapped stream later and madvise(MADV_SEQUENTIAL) or MADV_WILLNEED
> > could lead to significant performance gains -- fewer context switches
> > and much less cache pollution). I'd like to have zerocopy in the
> > next-gen MPlayer..
> The avi demuxer in lavf doesn't support dwStart, as far as I know. I got



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