I want to direct a video with the NV12 pixel format to a v4l2loopback device but I failed in all my attempts to do so. I tried this pipeline
gst-launch-1.0 videotestsrc ! videoconvert ! video/x-raw,format=NV12 ! v4l2sink device=/dev/video1
and /dev/video1 is my loopback device. Also I tried to use the v4l2loopback-ctl script to set the loopback device capapilities to NV12 without cuccess
./v4l2loopback-ctl set-caps "video/x-raw, format=NV12" /dev/video1
This pipeline works for other video formats , so, is it valid to direct NV12 to v4l2loopback devices?
I am working on ubuntu 16.04 with kernel version 4.13.0-37-generic and v4l2loopback version 0.11.0 compiled from source with this commit
After opening an issue on the project GitHub repository the answer was that this feature is not supported. I added it and my changes is merged in this commit.