2014-12-15, 11:09
To expand on my previous post... I've noticed something very strange in terms of greyscale reproduction (using the latest STABLE of OpenElec):
#1: OS RGB Full + Kodi Limited + TV Limited + No VAAPI = perfect greyscale reproduction, no banding
#2; OS RGB Full + Kodi Limited + TV Limited + VAAPI = significant black crush, banding
#3: OS RGB Full + Kodi Full + TV Full + No VAPPI = perfect greyscale reproduction, banding
#4: OS RGB Full + Kodi Full + TV Full + VAPPI = perfect greyscale reproduction, banding
#5: OS RGB Limited + TV Limited + No VAPPI = perfect greyscale reproduction, banding
#6: OS RGB Limited + TV Limited + VAPPI = perfect greyscale reproduction, banding
Based on this, the absolute best quality reproduction with my equipment is #1, AKA "RGB full made turned into limited with no VAAPI".
What concerns me, however, is I'm seeing significant black crush in the same environment merely by turning on VAAPI. Essentially, it is IGNORING Kodi's software limited mode setting and changing video levels to reproduce correctly in a "Full RGB" environment. Which is no doubt why if I force the TV into "Full" mode, then the VAAPI greyscale reproduces correctly.
#7: OS RGB Full + Kodi Limited + TV Full + No VAAPI = improper greyscale reproduction (see below 16, above 235), no banding
#8; OS RGB Full + Kodi Limited + TV Full + VAAPI = perfect greyscale reproduction (but GUI colors way elevated), banding
Any idea what's up here? Is it even possible to get VAAPI to not have banding?
#1: OS RGB Full + Kodi Limited + TV Limited + No VAAPI = perfect greyscale reproduction, no banding
#2; OS RGB Full + Kodi Limited + TV Limited + VAAPI = significant black crush, banding
#3: OS RGB Full + Kodi Full + TV Full + No VAPPI = perfect greyscale reproduction, banding
#4: OS RGB Full + Kodi Full + TV Full + VAPPI = perfect greyscale reproduction, banding
#5: OS RGB Limited + TV Limited + No VAPPI = perfect greyscale reproduction, banding
#6: OS RGB Limited + TV Limited + VAPPI = perfect greyscale reproduction, banding
Based on this, the absolute best quality reproduction with my equipment is #1, AKA "RGB full made turned into limited with no VAAPI".
What concerns me, however, is I'm seeing significant black crush in the same environment merely by turning on VAAPI. Essentially, it is IGNORING Kodi's software limited mode setting and changing video levels to reproduce correctly in a "Full RGB" environment. Which is no doubt why if I force the TV into "Full" mode, then the VAAPI greyscale reproduces correctly.
#7: OS RGB Full + Kodi Limited + TV Full + No VAAPI = improper greyscale reproduction (see below 16, above 235), no banding
#8; OS RGB Full + Kodi Limited + TV Full + VAAPI = perfect greyscale reproduction (but GUI colors way elevated), banding
Any idea what's up here? Is it even possible to get VAAPI to not have banding?