Intel VAAPI howto with Leia v18 nightly based on Ubuntu 18.04 server
@fritsch

Fritsch could you explain me which option is better for me?

My TV (Panasonic plasma) is "special one" and was starting point for whole passthrough kernel patch. With 4.4 kernel with your patch everything was as follows:

passthrough ON (or Full Range) + Full range in Kodi gave me best results in test movies (blacks below 16 were black and whites above 235 were white)

Things changed with 4.9 kernel:

passthrough ON (or Full Range) + Full range in Kodi gives me blacks up to 28 (maybe more. cannot check it on sample video) and all above 230 is white.
passthrough ON (or Full Range) + Limited range in Kodi gives me correct blacks (below 16) but whites blink up to 252. So it's only "half-correct".

So which one is better and why so much difference with these 2 kernels?
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