Using H.264/AVC DirectX* Video Acceleration with the Intel® G45/GM45 Express Chipsets


The Intel® G45/GM45 Express Chipsets includes the Intel® Graphics Media Accelerator X4500HD with built-in support for full 1080p high definition video playback, including Blu-ray* movies. The powerful video engine provides users with smooth playback without the need for add-in cards or decoders. Acceleration is provided via the Microsoft DirectX* Video Acceleration API.

Microsoft DirectX* Video Acceleration (DXVA) is an application programming interface for speeding up the decode process of video content by using the capabilities of the graphics hardware. Software codec's and applications can use DXVA to offload certain intensive operations which frees the CPU to do additional work.

This whitepaper discusses the implementation guidelines for the decoding of H.264/AVC video using DXVA on the Intel® G45/GM45 Express Chipsets. The information is intended to be used in conjunction with the DirectX Video Acceleration Specification for H.264/AVC Decoding, available from the Microsoft Corporation. The content in this paper was developed with close coordination of the authors of Media Player Classic Home Cinema* All of the reference code is available for download in the SourceForge repository.

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Download Using H.264/AVC DirectX* Video Acceleration with the Intel® G45/GM45 Express Chipsets [PDF 2.1MB]


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anonymous's picture

i really feel that this place where it all began and I hope I can be a part of this great networking site.

anonymous's picture

Only Vista with SP and Win 7 supports DXVA2. It's likely that the application mentioned is sitting in top DXVA2 rather than the original DXVA because AVC decoding isn't supported on DXVA(1).

anonymous's picture

After checking it and got none with Windows XP - reasonable question:
Why it supports only Vista+ and no XP??? This is not big problem with desktop systems where one can use 1080p software render. But with sh***y slow Celeron ULV 743 1 (one) Core CPU it becomes nightmare. What is necessary to do to get HW accel. of DXVA in Windows XP???

anonymous's picture

@Stephen - Thanks a lot for that link Stephen! I've been using Media Player Classic Home Cinema but i've not been getting stutter free playback despite cpu usage only being ~30%. i've given Splash a go and it's very good. I'll connect it up to the TV and hope it has the same results. Thanks Intel, those responsible for unlocking DXVA for GM45 and Stephen :D

anonymous's picture

There is already a very simple solution (if you are desperately searching for a software which is capable of using hardware acceleration for HD 1080p/720p videos): A very good video player, also supports mkv-files.

Just install it and it works fine. Tested on an Acer 1810TZ notebook with a GMA 4500MHD.

amaaron's picture

In the document, the helper sample code is from the Media Player Home Cinema project. Do you have sample code which uses the Intel IPP 6.1 H.264 decoder sample code to parse and prepare the bitstream for DXVA acceleration? From the umc_h264_dec* files, I see some methods and variables with "DXVA" in the name.

anonymous's picture

I got it working with a pure codec pack with cyberlink (DXVA) as the H.264 decoder & windows media player as the player. I had to manually associate windows media player with .MTS files (1080p) H2.644 files I had. I have windows vista 64 but used the 32 bit codec pack & 32 bit windows media player. I can watch the v1080p video on intel 4500MHD (GM45) with just 25% cpu util now & no pauses & perfect lip synch!!!! Hope this will help all the other intel 4500 MHD owners.

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