On Sun, 16 Jan 2011 10:46:27 -0800 VDR User <user....@gmail.com> wrote:
> On Sun, Jan 16, 2011 at 10:22 AM, Tony Houghton <h...@realh.co.uk> wrote: > > >> Maybe a better idea is to not assume anything at all, but rather > >> actually look up real life data or just buy one and see for yourself > >> (as I did). There's no reason to take guesses about any of this > >> stuff, plenty of users have posts their results and specs at various > >> forums. A good place to start would be nvnews.net and read the thread > >> "VDPAU testing tool". > > > > The results don't give the right information to determine how well a > > card can handle 1080i. > > You apparently don't know the results come from analyzing actual > playback of actual samples of actual content. Yes, the data tells you > exactly what kind of performance you can expect since it's generated > from actual use cases. Again, stop assuming everything and turning > your nose up at first-hand experience. I've ran those tests myself, > obviously know what deinterlacers I'm using, and have watched plenty > of content seeing the result with my own eyes from the hardware we're > talking about. Additionally I've done the same with various hardware > configurations.. What you're telling people simply doesn't agree with > reality. I've attached the results of qvdpautest on my desktop PC. Some of the examples appeared to have no more than 2 or 3 frames. Does the test generate a 'realistic' stream using the same few source frames over and over again? Even if it does, it seems a rather narrow sample. The MIXER results show unrealistically high fps. Evidently the deinterlacing is not being performed at the same time as decoding in these tests. I suppose it's easy enough to caclulate the frame rate of both operations combined for a worst case, but how do you know to what extent they can be performed in parallel?
qvdpautest 0.5.1 AMD Athlon(tm) II X4 620 Processor NVIDIA GPU GeForce 9800 GTX+ (G92) at PCI:1:0:0 (GPU-0) VDPAU API version : 1 VDPAU implementation : NVIDIA VDPAU Driver Shared Library 260.19.21 Thu Nov 4 21:46:12 PDT 2010 SURFACE GET BITS: 968.203 M/s SURFACE PUT BITS: 1021.38 M/s MPEG DECODING (1920x1080): 77 frames/s MPEG DECODING (1280x720): 154 frames/s H264 DECODING (1920x1080): 45 frames/s H264 DECODING (1280x720): 99 frames/s VC1 DECODING (1440x1080): 122 frames/s MIXER WEAVE (1920x1080): 2785 frames/s MIXER BOB (1920x1080): 4807 fields/s MIXER TEMPORAL (1920x1080): 1235 fields/s MIXER TEMPORAL + IVTC (1920x1080): 756 fields/s MIXER TEMPORAL + SKIP_CHROMA (1920x1080): 1629 fields/s MIXER TEMPORAL_SPATIAL (1920x1080): 485 fields/s MIXER TEMPORAL_SPATIAL + IVTC (1920x1080): 387 fields/s MIXER TEMPORAL_SPATIAL + SKIP_CHROMA (1920x1080): 538 fields/s MIXER TEMPORAL_SPATIAL (720x576 video to 1920x1080 display): 1682 fields/s MULTITHREADED MPEG DECODING (1920x1080): 75 frames/s MULTITHREADED MIXER TEMPORAL (1920x1080): 1032 fields/s
_______________________________________________ vdr mailing list firstname.lastname@example.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr