=== Enabling Hw Accel ===

Assuming Avidemux has been compiled with support for it and your PC supports it,
you should enable both the HW decoding and matching display driver

Both happen in preference

For example, for windows we'll want to use dxva2

So Enable Dxva2 HW decoding

{{:using:dxva1.png?200|}}

and use the matching display driver

{{:using:dxva2.png?200|}}

You can check it works by watching the two strings on the upper left

{{:using:display.png?200|}}

The left one is the decoder used
The right one is the display used

If the hardware accelerated fails, it should revert automatically to software

In the above example we are using software for both

If you see VDPAU/VDPAU or LIBVA/LIBVA or DXVA2/DXVA2 it means it's fully operationnal


The rule is :

  - Windows : DXVA2
  - Linux/Intel : LIBVA
  - Linux/NVIDIA : VDPAU

Using wrapper is a bad idea. For example VDPAU on top of Intel video driver.

The current DXVA2 is not fully optimised, there is back and forth copy. It will be fixed in the D3D11 version.