Auto-detect hardware acceleration

[klahaha]

We can detect hardware acceleration in program. Using ffmpeg cli

ffmpeg -init_hw_device list 2> /dev/null
Supported hardware device types:
vdpau
vaapi
qsv
drm
opencl

then no need for profiles config just print what profiles are used on startup

what outputs the command with nvidia proprietaire driver?

[m1k1o]

For nvidia it prints:

Supported hardware device types:
vdpau
cuda
vaapi

So it's cuda.

[klahaha]

now in repo via #3