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I am faced with the following problem. I'm trying to run the following pipeline:

gst-launch-1.0 decklinkvideosrc device-number=0 connection=sdi mode=2160p25 ! video/x-raw,width=3840,height=2160,format=UYVY,framerate=25/1 ! videoconvert ! x264enc ! queue ! mpegtsmux ! rtspclientsink location=rtsp://wowza-1234test.live:1935/dev/test

but it breaks with an error:

gst-launch-1.0: /build/libproxy-1BEpaZ/libproxy-0.4.15/libmodman/module_manager.hp:58: std::vector<T*> libmodman::module_manager::get_extensions() const [with T = libproxy::network_extension]: Assertion `obj != NULL' failed.
Aborted (core dumped)

At the same time, if I use video src -> videotestsrc instead of decklink, then everything is fine.