QGC grey gstreamer video

Hi!
Yes, I am on Linux, and thanks for the reply!

I get the pipeline and the stream up and running with:
raspivid -n -w 1280 -h 720 -b 1000000 -fps 15 -t 0 -o - | gst-launch-1.0 -v fdsrc ! h264parse ! rtph264pay config-interval=10 pt=96 ! udpsink host=<remote_ip> port=5600

And I am using the standard raspberry pi camera on a raspberry pi 4 and streaming over 4g.

The issue is that most of the frames are grey and only a few of them comes through and showing the correct image. Is that something you might know how to fix?

Thanks in advance for your help!