Strange vertical lines around light colors or light sources

[calloflunacy]

Been racking my brain over this for several hours and at my wits end. But I am getting some bizarre vertical lines around light sources in games, or just even certain colors on static images through my capture card.

system information
Operating System: Garuda Linux
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Kernel Version: 6.16.5-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 8 × AMD Ryzen 5 3400G with Radeon Vega Graphics
Memory: 16 GiB of RAM (13.6 GiB usable)
Graphics Processor: AMD Radeon Vega 11 Graphics
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: X570 I AORUS PRO WIFI
System Version: -CF

OBS version 31.1.2 (64bit)

Capture card AVMATRIX PCIE VC12-4k

System is updated, reloaded OBS and drivers just to be sure it wasn't an issue.

So looking at the 2 pictures below, and I can post more or videos if requested. The one picture with the strange vertical lines is in 1080p, this also occurs at 720p, or basically any other resolution besides 480p. I'm assuming 480p is just so little detail that it can't display the lines or whatever is causing this error. I'm not sure if this should be called artifacting, or some kind of dithering issue, it reminds me of the scan lines on old CRTs but this is HDMI. I've tried adjusting and changing settings in the encoder, making sure my input and output resolutions are the same, messing with bit rates anywhere from 2000 to 50000, using all the video filters, nothing I do seems to get rid of these lines. It drives me crazy because just the other day, it was recording perfectly fine at 1080p at 60fps with no lines. Now today it decided we are going to have lines, and I have no idea what caused it. I was adjusting some audio settings to get rid of some choppy audio I was having, and it happened. I've tried reverting those settings, swithing HDMI cables, did a full reset on OBS and it still happens. no idea if something in my OS could be causing it. but any input or assistance would be appreciated as I haven't had any luck searching for a similar issue online. (my google fu isn't strong enough for this one.) Worried my capture card might have just decided it's done even though it's only like a few months old. but hoping it's a software issue I can resolve.

 

[calloflunacy]

Did another update and reboot today on both computers, and the problem seems to have automagically fixed itself. I did updates and reboots last night as well, and it didn't resolve it. So no idea what changed today. I can say it appears to have been the computer sending the signal to the capture card, not the computer with the capture card. I'm extra confused as to what could have caused this as the HDMI signal passes through the card, and the image on the monitor on the pass through was fine. I'm assuming this was some sort of downscaling issue as the graphics card sending the signal to the capture card puts out 4k HDMI and the capture card was downscaling it to 1080p HD. Maybe one of the cables was getting hot or something. And no setting were altered in OBS when the problem fixed itself.

The problem resolved itself, however not knowing what caused it in the first place is always a bother. hopefully doesn't happen again.

 

[stephematician]

Unlikely to be an issue with OBS. If the signal to the monitor was fine but the signal to OBS was not - then I'd be thinking its either the capture card itself, an issue with the (pcie) bus (seems unlikely), or the device driver for the capture card (i.e. the kernel + any out-of-tree modules).