[mythtv-users] Temporal 2x vs Temporal-Spatial 2x

Mark Lord mythtv at rtr.ca
Wed Feb 8 17:26:12 UTC 2012


On 12-02-08 09:31 AM, William Powers wrote:
>> I didn't think the 520 could do Advanced 2x on 1080i? I would like to know
>> if you are indeed using it, and if you don't get skipped frames.
>>
> In a half-height frontend I have tried a passive G210, a passive GT520 and a
> GT220 with a fan. At least I think it's a fan. It sounds like a coffee
> grinder and the card eventually overheats anyway. But it's supposed to be a
> fan. In a full-height frontend I have tried an 8400 GS, a 9500 GT, and a GT
> 430, all passive. Only the 220, 430 and 9500 would reliably do Advanced,2X
> and, according to qvdpautest, the 430 and 9500 didn't have a lot of headroom.
...
> Fermi stream processors appear to be about half as capable as pre-Fermi
> units. Whether that is due to drivers or the design, I cannot say.


That's interesting.  So I just now went and ran the only objective benchmark
that seems to exist -- qvdpautest -- on my shiny new ASUS fanless GT430,
and compared results with an older run on the previous
(2-slot) Zotac fanless GT240 card.

The GT430 is faster at decoding than the GT240, twice as fast for VC-1,
and somewhat faster on all of the others.

But the GT240 blows it away for de-interlacing modes, by a wide margin.
The GT430 still comes out with room to spare for Advanced/2X,
but not nearly as much as the GT240.

Both cards have 96 stream processors, but the GT430 is Fermi, and the GT240 is not.

Data follows for posterity.  Stop reading now unless you like the nitty gritty.  :)

----------------------------  GT240 (old run from some time ago)
--------------------
qvdpautest 0.5
Intel(R) Core(TM)2 CPU          6700  @ 2.66GHz
NVIDIA GPU GeForce GT 240 (GT215) at PCI:1:0:0 (GPU-0)

VDPAU API version : 1
VDPAU implementation : NVIDIA VDPAU Driver Shared Library  195.36.15  Fri Mar 12
01:18:10 PST 2010

SURFACE GET BITS: 970.979 M/s
SURFACE PUT BITS: 1038.6 M/s

MPEG DECODING (1920x1080): 72 frames/s
MPEG DECODING (1280x720): 142 frames/s
H264 DECODING (1920x1080): 66 frames/s
H264 DECODING (1280x720): 121 frames/s
VC1 DECODING (1440x1080): 48 frames/s
MPEG4 DECODING (1920x1080): 68 frames/s

MIXER WEAVE (1920x1080): 1187 frames/s
MIXER BOB (1920x1080): 2037 fields/s
MIXER TEMPORAL (1920x1080): 584 fields/s
MIXER TEMPORAL + IVTC (1920x1080): 374 fields/s
MIXER TEMPORAL + SKIP_CHROMA (1920x1080): 759 fields/s
MIXER TEMPORAL_SPATIAL (1920x1080): 283 fields/s
MIXER TEMPORAL_SPATIAL + IVTC (1920x1080): 221 fields/s
MIXER TEMPORAL_SPATIAL + SKIP_CHROMA (1920x1080): 319 fields/s
MIXER TEMPORAL_SPATIAL (720x576 video to 1920x1080 display): 864 fields/s
MIXER TEMPORAL_SPATIAL + HQSCALING (720x576 video to 1920x1080 display): 501
fields/s

MULTITHREADED MPEG DECODING (1920x1080): 72 frames/s
MULTITHREADED MIXER TEMPORAL (1920x1080): 425 fields/s

----------------------------  GT430 (today) --------------------

qvdpautest 0.5
Intel(R) Core(TM)2 CPU          6700  @ 2.66GHz
NVIDIA GPU GeForce GT 430 (GF108) at PCI:1:0:0 (GPU-0)

VDPAU API version : 1
VDPAU implementation : NVIDIA VDPAU Driver Shared Library  290.10  Wed Nov 16
18:06:51 PST 2011

SURFACE GET BITS: 979.277 M/s
SURFACE PUT BITS: 1091.96 M/s

MPEG DECODING (1920x1080): 107 frames/s
MPEG DECODING (1280x720): 239 frames/s
H264 DECODING (1920x1080): 65 frames/s
H264 DECODING (1280x720): 135 frames/s
VC1 DECODING (1440x1080): 83 frames/s
MPEG4 DECODING (1920x1080): 72 frames/s

MIXER WEAVE (1920x1080): 232 frames/s
MIXER BOB (1920x1080): 329 fields/s
MIXER TEMPORAL (1920x1080): 148 fields/s
MIXER TEMPORAL + IVTC (1920x1080): 127 fields/s
MIXER TEMPORAL + SKIP_CHROMA (1920x1080): 186 fields/s
MIXER TEMPORAL_SPATIAL (1920x1080): 76 fields/s
MIXER TEMPORAL_SPATIAL + IVTC (1920x1080): 68 fields/s
MIXER TEMPORAL_SPATIAL + SKIP_CHROMA (1920x1080): 84 fields/s
MIXER TEMPORAL_SPATIAL (720x576 video to 1920x1080 display): 222 fields/s
MIXER TEMPORAL_SPATIAL + HQSCALING (720x576 video to 1920x1080 display): 145
fields/s

MULTITHREADED MPEG DECODING (1920x1080): 107 frames/s
MULTITHREADED MIXER TEMPORAL (1920x1080): 138 fields/s



More information about the mythtv-users mailing list