Question / Help Can't add more than 1 webcam in OBS Studio 0.13.4

[pidgezero_one]

OS: Windows 7 Professional

I know both of these cams work because Skype and Xsplit can each use both cameras simultaneously.

I have 2 webcams hooked up to my PC. I cannot add them both as sources. I can only have one or the other. Sometimes neither one will work unless I "Deactivate" one in OBS properties.

Error logs are all like this:

18:38:09.424: [DShow Device: 'Video Capture Device'] settings updated:
18:38:09.424: video device: Professional financial camera
18:38:09.424: video path: \\?\usb#vid_1871&pid_0101&mi_00#7&38a28ed2&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global
18:38:09.424: resolution: 640x480
18:38:09.424: fps: 30.00 (interval: 333333)
18:38:09.424: format: YUY2
18:38:19.084: ---------------------------------
18:38:19.084: [DShow Device: 'Side cam'] settings updated:
18:38:19.084: video device: USB2.0 PC CAMERA
18:38:19.084: video path: \\?\usb#vid_1908&pid_2311&mi_00#6&2a91081d&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global
18:38:19.084: resolution: 640x480
18:38:19.084: fps: 30.00 (interval: 333333)
18:38:19.084: format: YUY2
18:38:19.403: DShow: Run failed, device already in use (0x8007001F): A device attached to the system is not functioning.
18:38:19.403:

The cams are in different USB 2.0 ports. I have no other applications open that are using these webcams. Sometimes trying to add one when another is already active crashes the program.

Sometimes I get error messages like this in the logs:
21:30:47.954: [rtmp-services plugin] Remote update of URL "https://obsproject.com/obs2_update/rtmp-services/package.json" failed: schannel: failed to receive handshake, SSL/TLS connection failed
Not sure if related.

I also have an Elgato hooked up in a third USB port which is having no issues.

 

[Suslik V]

Actually, "...DShow: Run failed, device already in use..." is a true. Look deep into your system (don't run skype etc.)

"...SSL/TLS connection failed..." - unfortunately failed update check. Ignore it.

 

[sam686]

Log file shows both using USB, and USB have limited, shared bandwidth on each USB controller. Try plugging into different USB ports. In Device Manager, View by connection, ideally each video capture should be in different USB controllers.

Or, maybe reduce both webcam resolution down to maybe 320x240, to reduce amount of USB bandwidth needed, allowing both.