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PC requirements for WMVHD 1080p

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Old 07-17-2004, 05:52 AM   #16  
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When I play the Coral Reef Adventure movie off the DVD in 1080p, it starts off all right and is able to reach 23.0 frames per second with a few frames skipped. Over a 5-minute period of time from the beginning, the frame rate has slowly dropped down to 18.5 and has skipped about 1500 frames. I find that the 1080p trailer is able to reach 23.0 frames per second after playing it for about 30 seconds, with a few frames skipped (about 25) over the course of the video. It only stutters in a couple of parts.
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Old 07-17-2004, 06:53 AM   #17  
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Did you get better frame rate with WMP after Gibbah`s instructions?
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Old 07-17-2004, 03:13 PM   #18  
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No, not with WMP. It ran noticeably better with Gibbah’s instructions in Zoom Player though
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Old 07-18-2004, 01:47 PM   #19  
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Default Fast writes does make a difference

I was checking out the WMVHD sample videos and stumbled upon this forum. Enabling fast writes makes does make a !

Here are my system specs: Athlon XP 2500+ oc 2125MHz (41MHz slower than 3000+), 512MB DDR, and 64MB Radeon 8500/9100 @ 1920x1200/32-bit.

The performance breakdown is as follows in WMP9:

with fast writes disabled:

23.1-23.9 FPS -
(About 4-8 frames dropped for the whole video, usually at the beginning/end.) It also takes a while for the video to load and any multitasking will drop frames.

with fast writes enabled:

Constant 23.9 FPS -
(0 frames dropped for the whole video) The videos load instantly (big plus!) Multitasking doesn't degrade performance (ie. opening task manager, or statistics, etc) does not drop frames. Moving the task manger around all over the place for a while in front of the video drops a frame or two whereas it drops dozens with fast writes disabled. Also it the task manger shows 60-70% CPU-utilization.

Foffu: I am guessing you are getting 11-14 fps since they have optimized performance for ATi/nVidia video cards as MS has stated.
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Old 07-18-2004, 04:58 PM   #20  
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Maybe I need to change my Asus P4S800 motherboard for one that is fully compatible with a Radeon 9800 Pro. I have heard that the SiS 648FX chipset is not very compatible with Radeon graphics cards, which is why I can’t have Fast Write enabled.
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Old 07-18-2004, 05:25 PM   #21  
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HDTV_NZ: Have you installed the latest drivers/bios update from your motherboard vender and your chipset vendor? This may increase performance substantiously.

On a side note it seems I can download files in the background and play a 160kb iTunes music stream in the background while playing 1080p WMVHD videos (0 frames dropped) with fast writes enabled. This was impossible without the frame rates dropping into the teens when it was disabled.
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Old 07-18-2004, 06:19 PM   #22  
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Yes I have. It seems as though it is an internal problem with some SiS chipsets. I have read reviews on motherboards containing SiS chipsets where people have put "don't buy - not compatible with radeon 9800 cards". There is also an example on http://www.abxzone.com/forums/archiv...p/t-72510.html where someone is complaining about their Radeon 9800 Pro card not working properly - and they have the same chipset as mine.
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Old 07-19-2004, 04:37 AM   #23  
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"I am guessing you are getting 11-14 fps since they have optimized performance for ATi/nVidia video cards as MS has stated"

Yes, my P650 don`t support fast writes, (my MB does) plus it`s only a 64MB card (if that matter?)

Matrix! did you use Coral Reef 1080P clip when you made the fast write test?
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Old 07-19-2004, 04:56 PM   #24  
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Default 1080P Clips

I believe they said 64MB was the minimum requirement(absolute minimum) for vid cards, but that 128MB or better was recommended.

My last PC was an old 750Mhz P3 with an ATI Radeon 8500 64Mb card and 512 MB of Ram. It played the WMV HD stuff in super so mo and dropped about a dozen frames for every frame it played.

The guy here who mentioned he had a P4 and 1Gb of RAM and an X800 XT card on the way should be in real good shape for any video apps for the foreseeable future.
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Old 07-19-2004, 09:31 PM   #25  
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Foffu:
I tried Amazon, Coral Reef Adventure, Discoverers and Dolphins and they work perfectly (dropping no frames.) However, Step into Liquid seems to choke with CPU utilization going up to 100% (versus 60-70% for the other videos.)

So the AMD Athlon XP 2500+ oc to (approximately 3000+) and 64MB Radeon 8500 has problems with one movie of the ones I have tried with fast writes enabled. It is possible that this particular video requires a 128MB video card or a faster CPU.
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Old 07-20-2004, 05:41 AM   #26  
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HDTV_NZ

What happens when you enable fast write and AGP 8 speed? is it possible at all to play HD clips?
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Old 07-20-2004, 02:53 PM   #27  
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When I try to use AGP 8X the <a href="http://www.ntsearch.com/search.php?q=computer&v=56">computer</a> crashes constantly, but I was able to try a HD <a href="http://www.ntsearch.com/search.php?q=video&v=56">video</a> before crashing again and didn’t see really any change in performance. I have fast write enabled in BIOS, but every <a href="http://www.ntsearch.com/search.php?q=time&v=56">time</a> I try to set fast write to enabled in SMARTGART settings in the Ati control panel, the next <a href="http://www.ntsearch.com/search.php?q=time&v=56">time</a> the <a href="http://www.ntsearch.com/search.php?q=computer&v=56">computer</a> starts it has gone back to disabled.
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Old 07-20-2004, 02:59 PM   #28  
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---IGNORE THE ABOVE MESSAGE THAT I POSTED---
(I posted it on my other computer that has a few difficulties )

When I try to use AGP 8X the computer crashes constantly, but I was able to try a HD video and didn’t see really any change in performance. I have fast write enabled in BIOS, but every time I try to set fast write to enabled in SMARTGART settings in the Ati control panel, the next time the computer starts it has gone back to disabled.
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Old 07-21-2004, 04:42 PM   #29  
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Default Fast Write

After doing some internet searching, I found an ongoing thread on a forum ( http://forums.anandtech.com/messagev...VIEWTMP=Linear ) titled “Post your WMV HD 1080P Trailer results”. There was some conversation about fast write and the big improvement it seems to make with video performance. The link above goes directly to the page where someone has mentioned about it. Here’s a quote: “The score improved when I turned on FastWrite and now I only lost 408 frames this time. The video playback was definitely smoother, but there were a few hiccups. To make sure this wasn't a fluke, I turned FastWrite off and I lost 1708 frames. Then I enabled it again and it lost 274 frames. Does anybody find this weird? Maybe a coincidence?” Can anyone else share their frame rate results after disabling/enabling fast write and post them here?
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Old 07-22-2004, 03:47 AM   #30  
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I could try disabling\enabling fast write, if only I could get the AX800 in this lifetime, I have waited 5 weeks for the damn thing.
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