rtp_stream.sdp contains the stream description. The file can be modified to change the stream port, in conjunction with the video_rtp_stream module setting VIEWVIDEO_PORT_OUT.

rtp_stream.py opens the stream and displays the frames in a window. OpenCV can be further be used to post-process the stream. One can select a region of interest in the viewer to send a VIDEO_ROI message to the datalink. While dragging a region, the right mouse button will cancel the selection. Pressing the 'r' key rotates the view with increments of 90 degrees, 'q' closes the window and ends the script.