I am use ip camera with
v4l2loopback and this command to put videostream into deviceffmpeg -rtsp_transport tcp -i "rtsp://admin:admin@${CAMERAADDR}/" -fflags nobuffer -f:v mpegts -probesize 8192 -pix_fmt yuvj422p -r 20 -f v4l2 /dev/video0 -f alsa hw:0,0 >/dev/null 2>&1
and this work correctly to record video.
But didn't work to make a video call with this trouble:swscaler deprecated pixel format userd, make sure you didi set range correctly.
What settings shout I change and where to fix this?
Sorry for my english.