[FFmpeg-devel] [Hardware Accelerator for Video and Audio]
Thu Feb 21 12:21:23 CET 2008
On Thursday 21 February 2008 11:45:40 M?ns Rullg?rd wrote:
> Nico Sabbi wrote:
> > it is crazy (think of early DVB cards with a svhs output),
> > but transferring back the decoded frames may require something
> > almost equally crazy: 1920x1088x30 fps x 12bpp = 752 Mb/s == 94
> > MB/s
> > Even halved by means of a lossless compression it takes almost 50
> > MB/sec at 30 fps, back to 100 MB/s at 60 fps, that may be a lot
> > for a lower-end pc (where a dedicated decoder makes more sense)
> So have the decoder card dump the frames directly to video memory.
> Something has to do that write, be it the CPU or some other card.
not with a dedicated video-out
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