gstreamer from command line to code - multiple streams(inputs)

[jfinwebit]

I'm trying to write code which would work like this command line:

gst-launch-1.0 -e \
videomixer name=mix \
        sink_0::xpos=0   sink_0::ypos=0  sink_0::alpha=0\
        sink_1::xpos=0   sink_1::ypos=0 \
        sink_2::xpos=640 sink_2::ypos=0 \
        sink_3::xpos=0   sink_3::ypos=360 \
        sink_4::xpos=640 sink_4::ypos=360 \
    ! autovideosink \
videotestsrc pattern="black" \
    ! video/x-raw,format=AYUV,width=1280,height=720 \
    ! mix.sink_0 \
uridecodebin uri=rtsp://10.0.0.121:554/video.h264 \
    ! videoconvert ! videoscale \
    ! video/x-raw,format=AYUV,width=640,height=360 \
    ! mix.sink_1 \
uridecodebin uri=rtsp://10.0.0.122:554/video.h264 \
    ! videoconvert ! videoscale \
    ! video/x-raw,format=AYUV,width=640,height=360 \
    ! mix.sink_2 \
uridecodebin uri=rtsp://10.0.0.123:554/video.h264 \
    ! videoconvert ! videoscale \
    ! video/x-raw,format=AYUV,width=640,height=360 \
    ! mix.sink_3 \
uridecodebin uri=rtsp://10.0.0.124:554/video.h264 \
    ! videoconvert ! videoscale \
    ! video/x-raw,format=AYUV,width=640,height=360 \
    ! mix.sink_4 \
but honestly, I've got troubles with it. Already tried with several examples
but wherever I look, seems to be different way to do it. It is supposed to
be streamed over RTSP as one stream to client app so I need RTSP Server
Library, so I need to code it. Any suggestions, examples or maybe simple
code which shows how to use Pads(?probably?). I really stuck with it.
Thanks!



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