nvenc: Add support RGB 8/10bits formats
BGRA/RGBA/RGB10A2/BGR10A2 formats can be supported by nvenc. Depending on device, supported format can be different.
Fixes: #1038 (closed)
BGRA/RGBA/RGB10A2/BGR10A2 formats can be supported by nvenc. Depending on device, supported format can be different.
Fixes: #1038 (closed)