Enable VAAPI command arguments to ffmpeg if VAAPI is selected, and
add the "hwdownload" filter if transcoding from VAAPI to software.
Also support transforming 10 bit colourspace to 8-bit, consistent
with other hardware encoding options, at least until client pixel
formats are configurable.
Mostly small changes as I was looking through the code.
* async void -> async Task
* Properly implemented dispose methods
* Pass the logstream directly to the JobLogger
* Style fixes
ffmpeg is very picky about the filters to be used when using VA-API,
because most of them are incompatible. This is particularly evident when
burning-in subtitles.
Add Argument*Exceptions now use proper nameof operators.
Added exception messages to quite a few Argument*Exceptions.
Fixed rethorwing to be proper syntax.
Added a ton of null checkes. (This is only a start, there are about 500 places that need proper null handling)
Added some TODOs to log certain exceptions.
Fix sln again.
Fixed all AssemblyInfo's and added proper copyright (where I could find them)
We live in *current year*.
Fixed the use of braces.
Fixed a ton of properties, and made a fair amount of functions static that should be and can be static.
Made more Methods that should be static static.
You can now use static to find bad functions!
Removed unused variable. And added one more proper XML comment.