If the bug does not show itself, delete 'Cam test 2' scene collection and switch back to the 'Cam test 1' collection.

Switch back and forth between 'Cam test 1' and 'Cam test 2', and observe how one or both webcams no longer work in one of the collections, but may still work in the other collection.Duplicate the scene collection as 'Cam test 2'.Resize both webcam sources and the media source so you can see all 3 of them successfully in the preview window.(This isn't necessarily relevant to the problem but I had to add some scene items and this seemed to be just enough to trigger the problem) Now add a media source and choose a MP4 video to play in a loop, and enable hardware decoding.I am using 2 C920 cameras here in my reproduction testing. In the default scene, add 2 or 3 video capture devices of different webcams.

Create a new OBS scene collection 'Cam test 1'.

It becomes increasingly more likely to occur the more OBS scenes and sources that there are, which suggests some kind of race condition. Please note that with a simple OBS configuration with just a scene with a webcam the problem probably wont happen.

It can sometimes be coaxed into working by bring up the video capture properties for the webcam and disconnecting and reconnecting it, however sometimes this doesn't work and restarting OBS is required. After switching to another scene collection (any) which use the same webcam, the webcam will not work by default. When starting in scene collection 1, the webcam works as expected. When switching from one scene collection to another while streaming live and/or recording, any video capture devices which are used in both collections should continue to work when OBS OBS Studio version: 25.0.4 (and all other versions for the last 2 years or so) Expected Behavior Operating system and version: Windows 10 圆4 (1909)

Problems with obs webcam splitter