[Selene]

The most likely problems for bad PQ would be that the display driver on NUC is not matching with TV for black levels (16-255 vs 0-255) or color depth.

These are very easy things to mess up.

If you set the color and black levels to what matches BD content (which is not full RGB by-the-way) it should look correct.

That's how I'd also expect it to work, but I am unable to get the levels exactly right.

My preferred configuration would be 0-255 output from HDMI, 16-235 level from the decoder (no range conversion in colorspace conversion) and monitor set to 16-235 level input. This would allow for blacker-than-black and whiter-than-white (no clipping) and no banding. I used to have this setup with VDPAU.

I am currently having two problems with this. The HDMI output should have range information in the AVI infoframes (see http://lists.freedesktop.org/archives/in...23643.html), but it doesn't seem to be working (even if it was, I'd still need to patch it to allow signaling limited range while outputting without range conversion).

Working around this by setting full range with xrandr, using 16-235 levels from the decoder and setting the monitor input levels manually I am still seeing banding (and I think the levels are off). This suggests that even with full range the output is not 1-to-1. When I have more time, I'll recheck this with RGB images to eliminate the colorspace conversion.

An alternative configuration (if the level signaling can't be fixed) is to use full range output. In this case, the colorspace conversion should use higher precision and dithering to avoid banding. I checked xbmc, vlc and mplayer opengl renderers, and I don't think any of them support this yet.


I've been using avshd709 from http://w6rz.net/avshd709/MP4-2c.7z to test.

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Hi mate i tried the above autostart.sh script. It fixed my gray/blacks back to normal but i still cant use my remote.
If i ssh into my box and enter the commands it starts to work but after a reboot it stops again. Can it be something wrong running the commands in autostart.sh under latest openelec?

Please advice

After rebooting try running the script instead of typing in the commands. This will tell you if the script is ok.

I assumed you tried doing this already?

http://www.openelec.tv/forum/67-display/...t=90#74323