Mosaic View 4 RTSP Streams to one RTSP Stream help needed

[strab]

Changing videotestsrc to an local rtsp stream from an ip camera.

./test-launch "( videotestsrc !
videomixer name=comp 
sink_0::xpos=0 sink_0::ypos=0  sink_0::alpha=0
sink_1::xpos=0 sink_1::ypos=0 
sink_2::xpos=320 sink_2::ypos=0 
sink_3::xpos=0 sink_3::ypos=240 
sink_4::xpos=320 sink_4::ypos=240 


! videoconvert ! video/x-raw,format=NV12 ! x264enc ! rtph264pay name=pay0
pt=96 
uridecodebin uri=rtsp://user:pass@10.0.01/stream1 ! comp.sink_1  
videotestsrc ! comp.sink_2 
videotestsrc ! comp.sink_3 
videotestsrc ! comp.sink_4 )
" & sleep 1 && gst-launch-1.0 uridecodebin uri=rtsp://127.0.0.1:8554/test !
autovideosink && killall test-launch 

why didnt it run, it shows only the the 4 testvideo in a mosaic, where is my
error, to change one of them to my live videostream?

thx



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