Mission planner Gstreamer Pipeline setup

I use latest mission planner 1.3.49 + latest GSTREAMER msi.

I have no issues for open the pipeline below through windows cmd:
gst-launch-1.0 rtspsrc location=rtspu://admin:admin@192.168.100.103:554/cam1/h264 latency=50 ! decodebin3 ! autovideosink

Quality and lag is perfect.

But I can't open it though Mission Planner > vidéo set gstreamer source > ctrl+F Gstream.

Does anybody could help and tell me how to?

Start with Mission Planner's Video settings, specifically the GStreamer source path reached through Video > set GStreamer source > Ctrl+F Gstream. Compare how that path handles the supplied gst-launch-1.0 RTSP pipeline with the Windows command-line behavior; done means the reported pipeline opens successfully in Mission Planner.

Written by the indexing model from the issue text.