Video capture device has artifacts (flashes of lines in the image)

dchan51360

New Member
When I am using my two HD USB camera's either as full screen or cropped into a window, over a second image or scene, I get flashes of random lines in my images.

The symptom seems to be specific to OBS and occurs in the preview as well as the playback.

The artifacts also appear in my "camera" App when OBS is running however if I turn off OBS the artifacts go away in my camera app as well.

Here's a test live stream I did.. https://www.youtube.com/watch?v=T9EjBPKIid8

and here's the log file.


I don't know if it was happening before the latest updates to software because of Shelter in place, I had not been using this setup until recently. When we moved back into our space we got the new camera's to try to enhance the views for our congregation. Things I have tried so far are changing several of the bit rates, changing frame rates from each of the various camera's and feeds. Tried to match all of the frame rates on all the devices including OBS settings. Changed to various resolutions for the camera's. I have not tried changing to a lower resolution in the live stream but it does show up in the studio windows and preview windows even without having streaming turned on, just while building scenes.

If I open one of the camera's in the camera viewer app (native windows app) and view one camera there. The image is stable. As soon as I start OBS with one of the USB cameras active, I see the artifacts on both the OBS software and the Camera app. Having OBS running seems to affect my Logitech C920s as well and OBS does not have any scenes that use my Logitech webcam.

It does not seem to affect images being captured by my IP camera which is using "VLC source" to capture the ONVIF feed.

If I have OBS running and just deactivate the camera in the scene the symptom gets better on the windows camera app so it appears to be OBS is somehow affecting All the video devices being captured on the USB channel.

If I stop OBS completely, the symptom goes away on the other USB devices.

I have not tried using a zoom call to access the Logitech yet to see if it is also affected.

I hope that's enough info to help.
 

dchan51360

New Member
The camera's I've been using on the computer configuration are ELP USB box cameras with C-Vario lenses.
The other one seems to be a rebranded elp camera with only a 1080P sensor but the symptom was the same.

I tried different ports on the computer, made sure all the camera's had plenty of power to run (hubs with auxiliary power) fewer devices on the USB bus or used auxiliary power for devices running on the USB bus. The computer is modern newly built Lenovo I7 with vpro if it makes a difference. Latest build of Windows 10 pro with all updates current.
 

ebynum

New Member
Did you ever happen to resolve this? I have the exact same problem, and interestingly, it ONLY occurs when streaming. If I stop the stream, the artifacts go away. If I start it again, the artifacts begin almost immediately.
 
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