2015-10-09, 17:15
(2015-10-09, 05:20)Sunflux Wrote: You mention your projector is in "limited" mode. How are you doing this? Is there an auto option?
If you simply can't get your projector to accept a limited range signal correctly (and the same thing happens if you force the "Limited 16:235" option, which should result in your blacks being grey), then yes, use xrandr to manually set full mode, set Kodi to full with dithering, and then leave your projector on full. When you do this, you should only see greyshades between 16 and 235.
Thanks for the help so far. Also, I fixed the link to the picture in my post above. You can see the black bars below 16.
So my projector's color setting is misleading or broken. It's supposed to be "Auto", "RGB", or "YCrBr". I've always taken that to mean RGB = 0-255 and YCrBr = 16-235. However, after trying every combination of xrandr, kodi, and PJ colorspace setting, I've proven that the PJ setting doesn't actually do anything. I leave the PJ on RGB for now, but like I said, it doesn't really matter.
So without PJ options, I have tried all of the combinations on the software side, and I'm more confused than ever. I am running the Oct 6 Jarvis build. Here is what I've found:
Code:
xrandr kodi lowest banding comments
black
----------------------------------------------------------------
full limited 12 high blacks look okay, but bars below 17 flash. bad banding in greyscale ramp
full full 30 high black crush. no detail in shadows, bad banding
limited limited 0 low washed out, black bars flash all the way to 0
limited full 17 low looks good, less banding
pass limited 0 low washed out, black bars flash all the way to 0
pass full 17 low looks good, less bandingFrom this, I suppose I should run passthrough with full set in Kodi, but that is counter intuitive, isn't it?
Here is a picture of the banding from passthrough and kodi set to full. Dithering off. I can eliminate the banding with dithering set to 6.
