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• casimir666 September 15, 2008 4:02 PM PDT    DXVA specifications for G45 chipset? Hello, I'm one of the authors of "Media Player Classic - Homecinema" (http://sourceforge.net/projects/mpc-hc/). This open source player already support DXVA bitstream decoding with ATI and nVidia graphics cards. We plan to add support for Intel G45, but we have to following problem : standard Gui for H264 bitstream decoder (DXVA2_ModeH264_E and DXVA2_ModeH264_F) didn't seems to be implemented on G45. Furthermore, calls to function GetDecoderDeviceGuids on interface IDirectXVideoDecoderService return 2 Gui that did not appears in Microsoft DXVA specifications : BCC5DB6D-A2B6-4AF0-ACE4-ADB1F787BC89 and 604F8E68-4951-4C54-88FE-ABD25C15B3D6. I guess one of the is for VC1, and the other for H264 bitstream decoder. So my question is : does Intel use a specific protocol for bitstream decoder, and if so is it possible to have the specifications? Thanks Casimir ChrisMcVay September 19, 2008 11:33 AM PDT Rate   #1 Re: DXVA specifications for G45 chipset? I'll look into this and let you know what I find.   Chris ChrisMcVay September 23, 2008 9:05 AM PDT Rate   #2 Reply To #1 Re: DXVA specifications for G45 chipset? It took me a couple of days as I had some dialog with the media engineers. Essentially, G45 doesn't support the standard GUIDs for VC1 or AVC, and the private specifications are not publicly available. It reminds me of a philosophical question - if an interface has no spec and no one is able to use it, does it truly exist?   Chris casimir666 September 23, 2008 12:27 PM PDT Rate   #3 Reply To #2 Re: DXVA specifications for G45 chipset? Thanks a lot Chris for your efforts to answer my question. I hope Intel will change his mind and publish this specifications in the future. Regards, Casimir ChrisMcVay September 25, 2008 5:16 PM PDT Rate   #4 Reply To #3 Re: DXVA specifications for G45 chipset? Heh, me too. I'm continuing to push for this internally. We'll see how far I get.   Chris papayaone September 27, 2008 1:29 AM PDT Rate   #5 Reply To #3 Re: DXVA specifications for G45 chipset? Quoting - casimir666 Thanks a lot Chris for your efforts to answer my question. I hope Intel will change his mind and publish this specifications in the future. Regards, Casimir hi, me too, i am a newer here,i am intersited in intell software.   papayaone mlohse October 17, 2008 9:56 AM PDT Rate   #6 Reply To #2 Re: DXVA specifications for G45 chipset? I am coming across this thread after a longer research on the web: I would be very interested in getting all technical information about how to use hardware decoding of the G45 / X4500HD platforms in custom software, i.e. is it fully DXVA compliant (1.0 and/or 2.0)? Is there an other (Intel) API for accessing these features? Is the API publicly available? If not (as it seems), how am I able to get access to this information? Thank you. Marco Cijo Abraham Mani October 18, 2008 3:13 AM PDT Rate   #7 Reply To #6 Re: DXVA specifications for G45 chipset? Quoting - mlohse I am coming across this thread after a longer research on the web: I would be very interested in getting all technical information about how to use hardware decoding of the G45 / X4500HD platforms in custom software, i.e. is it fully DXVA compliant (1.0 and/or 2.0)? Is there an other (Intel) API for accessing these features? Is the API publicly available? If not (as it seems), how am I able to get access to this information? Thank you. Marco Have you gone through the product specification ? Please go through the following PDF file . http://www.intel.com/assets/pdf/prodbrief/dg45id_product_brief.pdf   The information you are searching for might  would be available there .   Regards , Cijo mlohse October 20, 2008 1:44 AM PDT Rate   #8 Reply To #7 Re: DXVA specifications for G45 chipset? Quoting - cijoaj2003 Have you gone through the product specification ? Please go through the following PDF file . http://www.intel.com/assets/pdf/prodbrief/dg45id_product_brief.pdf   The information you are searching for might  would be available there .   Regards , Cijo Thank you for your reply. From the pdf file you referenced (or the product brief of dg45fc, which I already read), I am unable to answer my questions, i.e. the document only says that DirectX 10 is supported, and some end-user software is included, which is related to media processing and playback. On the other hand, the discussion in this thread points out that some interfaces for hardware decoding are not public, are they?   alex-domoq October 21, 2008 4:57 AM PDT Rate   #9 Re: DXVA specifications for G45 chipset? I would like to add, that X4500HD drivers for Windows XP seams to not support H264 HW Acceleration at all. I have tried all the accelerated codecs: TotalMedia, PowerDVD, WinDVD, etc, and they are not able to unload CPU from decoding in Windows XP, while they can in Vista. Anyone can confirm this? davidc1 October 21, 2008 6:08 AM PDT Rate   #10 Reply To #9 Re: DXVA specifications for G45 chipset? Quoting - alex-domoq I would like to add, that X4500HD drivers for Windows XP seams to not support H264 HW Acceleration at all. I have tried all the accelerated codecs: TotalMedia, PowerDVD, WinDVD, etc, and they are not able to unload CPU from decoding in Windows XP, while they can in Vista. Anyone can confirm this? Intel follows the HDCP rules more strictly than ATI/Nvidia. Windows XP hardware acceleration with HD video aren't supported because of that. They don't like bending rules.

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