So the card arrived today, and I've spent the afternoon experimenting. Fortunately, getting it work wasn't too hard. The results so far are largely what I expected. For testing, I captured a second of uncompressed 8-bit quicktime uncompressed YUV using BlackMagic's software, of which five consecutive frames were analysed. The video was of the windows 10 desktop with default W10 wallpaper. The program I wrote tests only for temporal dithering, I will make something for spatial dithering but that's a slightly trickier task.
Initial results:
| Integrated | Model | Driver | Port | Ditherig | Result |
|---|---|---|---|---|---|
| intel integrated graphics | i5 6400 | DisplayPort (DP) | Ditherig set to 'No Dithering' | No temportal dithering detected | |
| intel integrated graphics | i5 6400 | DP | Ditherig set to 'Spatial (default)' | No temportal dithering detected | |
| intel integrated graphics | i5 6400 | DP | Ditherig set to 'Spatial Temporal 1' | Temporal dithering detected | |
| GT210 | not sure which drivers | HDMI | Temporal Dithering Detected | ||
| GTX 1060 | latest drivers | HDMI | Temporal Dithering Detected | ||
| GTX660 | driver: 388.13 | DP | Temporal dithering detected | ||
| GT720 | Driver 341.74 | HDMI | Temporal Dithering Detected | ||
| AMD firepro W700 | latest drivers | Temporal dithering detected |
I am somewhat confident these results are right, I was surprised that ditherig/intel actually worked as I've had discomfort using a setup like this - but the results match ditherig's settings. Also no surprise that the 1060 dithered.
There's quite a lot of things for me to test: Different ports/computers, recording text, different software, cards and operating systems. Will keep you all updated.
edit by: @Slacor to include table
