I also encountered this problem and did some digging. I believe it is caused by this: https://github.com/umlaeute/v4l2loopback/issues/172
The tl;dr; is that kernel 4.16 and above changed a thing which breaks bionic's v4l2loopback 0.11 . It is fixed in v4l2loopback 0.12.0 and we should upgrade. ** Bug watch added: github.com/umlaeute/v4l2loopback/issues #172 https://github.com/umlaeute/v4l2loopback/issues/172 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1825863 Title: ERROR: from element /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: Internal data stream error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/v4l2loopback/+bug/1825863/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
