Python Gstreamer Integration

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi, I’m trying to get the GStreamer UDP running in Python.

I have a testing code which run with no problem

videomixer = 'videomixer name="mix"'
sinkpad = 'sink_0::xpos=0 sink_0::ypos=0 sink_1::xpos=960 sink_1::ypos=0'
videoconver = ' ! videoconvert ! xvimagesink'
src1 = 'videotestsrc pattern="snow" ! videoconvert ! mix.sink_0'
src2 = 'videotestsrc pattern="colors" ! videoconvert ! mix.sink_1'
command = [videomixer, sinkpad, videoconver, src1, src2]
command = ' '.join(command)
p = Gst.parse_launch(command)
p.set_state (Gst.State.PLAYING)

But i’d like to change the videotestsrc to my UDP src:

udpsrc port="8001" ! "application/x-rtp,payload=96,encoding-name=H264,clock-rate=(int)90000" ! rtph264depay ! h264parse ! avdec_h264 ! mix.sink_0
udpsrc port="8002" ! "application/x-rtp,payload=96,encoding-name=H264,clock-rate=(int)90000" ! rtph264depay ! h264parse ! avdec_h264 ! mix.sink_1

Directly replacing src1 and src2 didn’t work, it’s complaining the syntax error (0), which doesn’t help much to see why it’s not working. I’m guessing the problem is with “application/…” that line, not sure how to put in python properly?
Can someone please share some experience ? Thanks!

3

Hi,
We suggest check if the gstreamer pipeline can be launched in gst-launch-1.0 command, and then apply to python gstreamer.

4

Yes, I’ve tried command line and it’s working. Just not correct after integrating in Python

5

Hi,
Could you please go to gstreamer forum? It is more like an issue in python gstreamer programming. Gstreamer users are more expereinced and may share better suggestion/guidance.