[FFmpeg-devel] [PATCH v2 6/6] lavc/qsvdec: Add VP9 decoder support

[Li, Zhong]

> More widely, I would actually suggest to revise existing mediasdk plugins
> loading path and change it from loading plugins at the first place to:
> 1. Try to initialize component directly from the library 2. If #1 fails, try to
> initialize component from the plugin This will allow to avoid a cost of plugins
> loading when you don't actually need to load them and will preserve
> compatibility with the old versions of mediasdk.

That could be a good idea but only based on a query interface, instead of MSDK initialization failure. 
There are many reasons may cause the failure but application can't what is the exact reason.
I haven't see MFXVideoDECODE_Query() has exposed this, this could be addressed if you have a plan to improve MSDK query functions.