[mythtv-users] Mythtv playback problem with NVIDIA videoa cceleration - HELP! (still unsolved)

[Brian Stults]

Jarod Wilson wrote:
> On Friday 01 April 2005 14:52, Jarod Wilson wrote:
> 
>>On Friday 01 April 2005 07:35, Brian Stults wrote:
>>
>>>Jarod Wilson wrote:
>>>
>>>>On Tuesday 29 March 2005 09:52, Jarod Wilson wrote:
>>>>
>>>>>>Can't wait to bench my new workstation -- Athlon 64 3500, PCI-Exp.
>>>>>>GeForce 6600GT. :-)
>>>>>
>>>>>For the record, just did bench it. Kinda snappy:
>>>>>
>>>>>31203 frames in 5.0 seconds = 6240.600 FPS
>>>>>31111 frames in 5.0 seconds = 6222.200 FPS
>>>>>30740 frames in 5.0 seconds = 6148.000 FPS
>>>>>31442 frames in 5.0 seconds = 6288.400 FPS
>>>>>
>>>>>That's w/the 7167 drivers on RHEL4 x86_64.
>>>>
>>>>And now with 7174, same box:
>>>>
>>>>35696 frames in 5.0 seconds = 7139.200 FPS
>>>>35680 frames in 5.0 seconds = 7136.000 FPS
>>>>
>>>>Hopefully, 7174 has rectified all the issues that made 7167 somewhat
>>>>still-born for so many folks...
>>>
>>>I've never used glxgears before, so I decided to give it a whirl on my
>>>frontend.  I get *much* smaller numbers:
>>>
>>>3057 frames in 5.0 seconds = 611.400 FPS
>>>3172 frames in 5.0 seconds = 634.400 FPS
>>>3162 frames in 5.0 seconds = 632.400 FPS
>>>3173 frames in 5.0 seconds = 634.600 FPS
>>>
>>>Of course, my system is very different from yours, so I'm curious which
>>>particular difference between the systems makes the most difference in
>>>the rendering speed.
>>>
>>>I suspect the two most relevant factors are CPU and GPU.  First, I only
>>>have an Athlon XP 2400. Second, my mobo is a 7NIF2, so I'm using the
>>>integrated MX 440.  Do both of these have a big influence, or would you
>>>say one is more important than the other?
>>
>>I believe the video card should have a bigger impact. I have yet to test my
>>7NIF2 box, I'll play with that over the weekend though. I'm still not
>>certain exactly what to expect where. My 2.8GHz HT-P4 workstation w/a GF FX
>>5200 only clocks around 1100fps. But then another system with a GF4Ti
>>cranks out over 4000fps. The P4 has no problem keeping up with HDTV though.
> 
> 
> Just benched my 7NIF2 box. Athlon XP 1800 cpu and I'm currently using an AGP 
> card (gives better performance w/HDTV playback), clocks in around 1100fps 
> w/the 7174 driver, was around 900fps w/6629. I'm guessing I'd be right in 
> your ballpark using onboard video, since shared mem is slower.
> 
> Of course, OpenGL performance isn't directly relational to a system's ability 
> to play back video anyhow, but not a bad way to see if the card is being fed 
> as fast as possible. I seem to recall Brandon Beattie's site mentioning a 
> high-end nVidia card and a GF4MX having roughly the same video decode 
> ability, their only difference really being in the 3D arena. Whether that's 
> completely accurate anymore when a GF4MX is compared with the GF 6 series' 
> decode performance, I have yet to find out, but should this weekend...
> 

Wow!  I really appreciate you looking into this.  It will definitely 
help as I decide on the hardware for my next frontend.