2015-10-08, 12:09
ok thanks
(2015-10-08, 12:43)fritsch Wrote: Kernel issue - most likely introduced when updating to 4.1.10 ... I will upgrade to 4.3 the very moment it is out ... Braswell and 4.1.x is meh anyways.
(2015-10-08, 01:29)Sunflux Wrote: What projector are you using? If dithering is having such an impact, then it sounds like you aren't actually outputting limited via the new passthrough option (I haven't seen dithering do anything visible in Passthrough mode, but it definitely has an effect in Full mode, which is less ideal).
OpenELEC:~ # xrandr --verbose
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
HDMI1 connected 1920x1080+0+0 (0x47) normal (normal left inverted right x axis y axis) 520mm x 290mm
Identifier: 0x42
Timestamp: 1230566513
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 0
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
EDID:
00ffffffffffff0011ee400001010101
00180103800000780a9abb9f60519c23
0e4d59ffef80a9409500904081806159
455901010101023a801871382d40582c
450000000000001e000000ff00533846
3132343130303431300a000000fc0044
454e4f4e2d41565248440a20000000fd
00325a0f6410000a20202020202001f9
020336f14f90050403071f1413121601
0f241e26350f7f071507503d1ec04d02
005706015f7e01677e01835f00006703
0c002500882d023a801871382d40582c
450008222100001e023a80d072382d40
102c458008222100001e011d8018711c
1620582c250008222100009e011d0072
51d01e206e28550008222100001e0091
aspect ratio: Automatic
supported: Automatic, 4:3, 16:9
Broadcast RGB: Video 16:235 pass-through
supported: Automatic, Full, Limited 16:235, Video 16:235 pass-through
(2015-10-09, 03:08)Sunflux Wrote: That image isn't working.
What the new "Video 16:235 pass-through" option is, is the old Full mode, but with the proper tagging to tell your device that it's receiving a limited signal (note that you need to be running the latest Isengard build for this to work). Previously, you would manually switch to Full mode, set Kodi to Limited, and then manually force your display device to treat it as a limited range signal (which not every display can do). This avoids the video driver doing any range comparession/expansion, which is what causes all the banding in the first place.
When your display device is working correctly, you should NOT see anything darker than bar 16. If you are, then it isn't treating it as a limited range signal, and everything will look washed out. Seeing brighter than 235 is fine.
(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.
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 banding