gstreamer - How to open an rtp jpeg stream in opencv? -

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I'm trying to open a video stream in opencv but I'm having some problems I started a stream on it I can: 

  GST-Launch-V v4l2src device = / dev / video0! 'Video / X-Raw-UUV, width = 640, height = 480'! Jpegenc quality = 30! Rtpjpegpay! Udpsink host = 127.0.0.1 port = 1234

`

and I can open it with: 

  gst-launch udpsrc Port = 1234! "App / X-RTP, Payload = 127"! Rtpjpegdepay! Jpegdec! Xvimagesink sync = false

But when I tried to open it in my code with 

  VideoCapture cv_cap; Cv_cap.open ("RTP: 127.0.0.1: 1234 /");

I get an error about missing SSP files. I know what a sdp file is and I should get information from gystream output for this, but I do not understand how to parse the output.


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