Automatic hardware encoding settings by architecture

[TheDreadPirate]

The problem is that even within a generation of CPUs/GPUs there are inconsistencies. AMD and Nvidia are the bigger offenders. Intel is pretty consistent, but there are still exceptions. So having a static mapping would require a lot of work and validation.

Even using vainfo to attempt to get a GPUs codec support is not a guaranteed way the get the full picture.

Since we are not a for-profit business, we don't have dozens of test benches with various hardware combinations to validate this kind of capability.

Having said that, there are efforts to figure out an acceptably reliable way of doing this. No ETA.