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Old 12-02-05, 11:17 AM   #1
spinner
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Default Questions regarding OpenGL and video playing

hi,
I am getting a new box with Athlon64 3800+ (512KB L2 @ 2.0Ghz) and a NForce 4 Ultra motherboard and 2GiB DDR400 RAM.

I am using Linux and I DON'T play games. (no M$ windows here.)
Does NVidia supports OpenGL 2.0?
Are the NVidia drivers open source ?

I want to get an NVidia card that supports OpenGL 2.0 because I can see a difference when playing my movies with using video output OpenGL rather than using an X driver.
(use mplayer -vo gl2 or mplayer -vo gl or change the video drive in xine to gl2 and see the results )

So does OpenGL cards really affect the video output ?
Is OpenGL 2.0 much better than OpenGL 1.5 ?
References on HDTV are welcome

Does L2 cache size of the processor and/or RAM matter when I use OpenGL ?

Any suggestions appreciated.
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Old 12-02-05, 07:39 PM   #2
arokh
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Default Re: Questions regarding OpenGL and video playing

X-Video is better suited for OpenGL. Any video output using OpenGL neither need or use 2.0 extensions. Also, your machine will play videos fine
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Old 12-05-05, 10:33 AM   #3
spinner
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Default Re: Questions regarding OpenGL and video playing

also I have a few more questions:

1)NVidia gives official kernel patches.
How long does it take for these patches to support the most recent stable kernel ? (2.6)


2)Are drivers thread-safe ? will they run good and support OpenGL on a X2 with a SMP kernel ?

3)There is support for PCIe cards , right ? (just in case..)

I've read that in some cases on an SMP kernel you need to disable I/O APIC to get the drivers working..hope I won't need I/O APIC for my ASUS NForce 4 SLI (can't find Ultra anymore )
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Old 12-06-05, 10:58 AM   #4
spinner
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Default Re: Questions regarding OpenGL and video playing

Another last one: Does Nvidia 6600 (NOT GT) support OpenGL 2.0 ?
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Old 12-06-05, 11:14 AM   #5
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Default Re: Questions regarding OpenGL and video playing

Quote:
Originally Posted by spinner
also I have a few more questions:

1)NVidia gives official kernel patches.
How long does it take for these patches to support the most recent stable kernel ? (2.6)


2)Are drivers thread-safe ? will they run good and support OpenGL on a X2 with a SMP kernel ?

3)There is support for PCIe cards , right ? (just in case..)

4) Does Nvidia 6600 (NOT GT) support OpenGL 2.0 ?

I've read that in some cases on an SMP kernel you need to disable I/O APIC to get the drivers working..hope I won't need I/O APIC for my ASUS NForce 4 SLI (can't find Ultra anymore )
1) Well, not a problem.. nvidia was always fast enough to save the day.
2) Yes, everything should work in a dual cores environment.
3) Yes!
4) Probably yes!
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Old 12-07-05, 10:19 AM   #6
ReimarD
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Default Re: Questions regarding OpenGL and video playing

Quote:
Originally Posted by arokh
X-Video is better suited for OpenGL. Any video output using OpenGL neither need or use 2.0 extensions. Also, your machine will play videos fine
First, X-Video has some problems OpenGL does not have, like ugly OSD when upscaling the video (at least with MPlayer), and the fact that it sometimes just stops working (only blue/green screen instead of video).
Second, MPlayers OpenGL output can make use of quite a few extensions, among those GL_ARB_pixel_buffer_object, which gives a big speed advantage, esp. with huge videos (unfortunately it does not help speed with luminance textures, which are useful for OSD and YUV rendering).
IIRC GL_ARB_pixel_buffer_object is an OpenGL 2.0 extension.
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Old 12-07-05, 10:30 AM   #7
zander
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Default Re: Questions regarding OpenGL and video playing

@ReimarD: do you still see the blue screen problem with the NV17 video overlay with the 1.0-8174 NVIDIA Linux driver? It should be resolved as of this release.
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Old 12-07-05, 10:40 AM   #8
ReimarD
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Default Re: Questions regarding OpenGL and video playing

Quote:
Originally Posted by zander
@ReimarD: do you still see the blue screen problem with the NV17 video overlay with the 1.0-8174 NVIDIA Linux driver? It should be resolved as of this release.
I never had it (except when using xvmc, haven't tested that yet), I just know the reports (even from ATI users, or people using the OpenSource driver). In some cases it is just XV_AUTOPAINT_COLORKEY set incorrectly, but there seem to be other causes as well, which make it annoying to use XVideo for some people.
Sorry for the confusion.
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Old 12-08-05, 11:00 AM   #9
spinner
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Default Re: Questions regarding OpenGL and video playing

yes opengl does help at video output and no 6600 models do not support OpenGL 2.0

Anyway a guy at opengl.org told me that opengl 2.0 isn't gonna help with mplayer so I am going for a simple GF 6600 (openGL 1.5) model


Can someone confirm that GF 6600 (_NOT_ GT but simpe one) does _not_ support OpenGL 2.0 ?
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