Hi there,
We're designing a HDMI Capture with 1080i stream.
It's considered that the capture outputs the RAW of NV12 to the MSDK encode frame buffer(DXVA) by the way of DMA though PCIE.
I would like to ask, whether the MSDK hardware impl support that kind of input behavior? (seems more efficient without colorspace convert.)
Any advices appreciated.
Regards,
Joyah
Hi Joyah,
Your solution is good as long as "DXVA buffer" is a Direct3D9 or a Direct3D11 (DX11.1 on Windows 8) surface - that's what Media SDK Encoder supports at input.
Please also note that you have to provide the D3D device used to create D3D buffers and an external frame allocator to Media SDK so that HW accelerated encoding can be performed on those buffers. I recommend to check out sections "Working with Microsoft* DirectX* Applications" and "Memory Allocation and External Allocators" of mediasdk_man.pdf for more details.
Regards,
Nina
Joyah,
You can also use system memory to do this, and the programming model is simpler to get going than Direct3D,
but you will pay a performance penalty.
In my experience encoding 1080P from system memory was about 78% as fast as using Direct3D surfaces.
So, you have a couple options.
Cameron
Quote:
Nina Kurina (Intel) wrote:Hi Joyah,
Your solution is good as long as "DXVA buffer" is a Direct3D9 or a Direct3D11 (DX11.1 on Windows 8) surface - that's what Media SDK Encoder supports at input.
Please also note that you have to provide the D3D device used to create D3D buffers and an external frame allocator to Media SDK so that HW accelerated encoding can be performed on those buffers. I recommend to check out sections "Working with Microsoft* DirectX* Applications" and "Memory Allocation and External Allocators" of mediasdk_man.pdf for more details.
Regards,
Nina
Your reply helps a lot, thank you!
Quote:
camkego wrote:Joyah,
You can also use system memory to do this, and the programming model is simpler to get going than Direct3D,
but you will pay a performance penalty.
In my experience encoding 1080P from system memory was about 78% as fast as using Direct3D surfaces.So, you have a couple options.
Cameron
If native memory for the capture device output is video memory it would be better to use D3D surfaces to avoid costly copy from video to system memory.
Regards,
Nina