Reply 220 of 291, by christal87
gen_angry wrote on 2022-06-21, 00:59:
DOS prompt has this weird grey background effect, like looking at a very old TV or watching something through composite. https:/ […]
DOS prompt has this weird grey background effect, like looking at a very old TV or watching something through composite.
Win 3.11 has the same issues more or less despite it's resolution.
Using the voodoo is no different.
I'm not sure if this is about what everyone else's aixxco adapters put out or did I get a fake clone?
I see some bars in the DOS prompt background, it could be noise. My WD Paradise graphics card is noisy like that and I've heared it used to be like that from factory. (Also I'm living in a 50Hz environment so no idea on 60Hz mains interference). Still at the prompt I can somewhat notice a slight ghosting. That might come from reflections or crosstalk in your VGA cable. My guess for the under/overscan (shifted image) in Windows is the Aixxco with not only the resolution, but a combination of the resolution on a particular refresh rate (the Aixxco adapter can't really set that actual timing or measures it wrong).
To get the most out of it use good quality cables (especially for the DSUB ended ones that carry analog VGA signals), fine tune colors/brightness on your HDMI capure device or do it in post processing. Last but not least try to find a low noise power supply for the Aixxco, but this setup will never be as crisp as with studio quality gear. It's just usable for a few modes. I'm happy that 70Hz DOS prompt at least works with el cheapo stuff, because a lot of other models out there don't even work on that mode (I have a Foinnex, that never worked, must be another revision). 😀 Look at my screenshots from OBS. It's different resolutions/modes captured on a 800x600 "scene" so it's upscaled. There's some under/overscan (picture is shifted in some modes). As most cheap USB capture devices these are basically a webcam combined with an HDMI frontend. I have to use some V4L2 commands on my linux box to tune it's settings every time I want to do some recording (better to use scripting here). These screenshots are captured in YUV (not MJPEG) made using a Cirrus graphics card without any fine tuning. Also I only used this aixxco for capture, so I have no good tips on directly connected monitor setups.