HDR encoding

[Selur]

Will look at the debug output later. Earliest in 3 hours, reading the debug output on a mobile is just too much pain.
16bit is used since both LwLibAvSource and DGSource return 16 bit for everything above 8 bit. 420 is used since that is the color sampling of your source.
709 is probably used since that is what Hybrid detected. Will know more once I look at the debug output. As a side note: Unless you do RGB<>YUV concersions, the matrix doesn't matter.

Cu Selur