These work as well in Chromium:
gst-launch-1.0 videotestsrc is-live=true ! 'video/x-raw, format=I420, framerate=30/1' ! tee ! v4l2sink device=/dev/video2
gst-launch-1.0 videotestsrc is-live=true ! 'video/x-raw, format=UYVY, framerate=30/1' ! tee ! v4l2sink device=/dev/video2
Are the (memory:NVMM) and “nvvidconv” components actually converting it back OUT of NV12?
::CONFIRMED:: When I run the following the v4l2-device info shows it being converted into a YUYV stream and NOT NV12.
gst-launch-1.0 nvcamerasrc ! 'video/x-raw(memory:NVMM),width=640, height=480, framerate=30/1, format=NV12' ! nvvidconv flip-method=0 ! tee ! v4l2sink device=/dev/video2
It sounds like the answer is that Chromium/webrtc do not support NV12 natively.