What is the video decoding difference between Intel Quick Sync and DXVA?

Question

Intel

I would like to understand the differences in the ways of hardware video decoding using Intel Quick Sync and DXVA on Intel HD Graphics, - explain?

And in particular, which video decoding method is preferable to use on the Intel HD Graphics 4600 and why? Configuration: i5 4670/H87/16Gb/Win8.1 x64

Answer 1

These are fundamentally different things.

IntelQuickSync is a hardware video decoding and encoding technology . To use this technology inside your application, you need to connect the Intel Media SDK, which will provide you with an API to work with.

DXVA is just a software API that allows you to unify work with video data streams for various applications. He knows how to transfer most of the work from video to the GPU, but he decides what exactly.

QuickSync support depends on the OS drivers, in Win8 the drivers support QuickSync and in theory it will be enabled automatically when used in your DXVA application.

But if you want some more optimal or specific solutions, then by integrating MSDK into your application you can directly work with QuickSync