gstreamer udp rtsp

gstreamer_udp_rtsp.md

Snippets collected/distilled from gists/blog posts/etc. Combined here for fellow web-searchers -- goal is to have an easy/minimal sink for in-app use, and then forward that stream in another process.

Read camera, push to UDP sink (usually from appsrc, here v4l2 camera):

$ gst-launch-1.0 -vvvv v4l2src ! 'video/x-raw, width=640, height=480, framerate=30/1' ! videoconvert ! x264enc pass=qual quantizer=20 tune=zerolatency ! rtph264pay ! udpsink port=1234

Visualize above:

$ gst-launch-1.0 -vvv udpsrc port=1234 ! "application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H264" ! rtph264depay ! h264parse ! decodebin ! videoconvert ! xvimagesink sync=false

Instead of preceding, read UDP stream and republish over network as RTSP stream, using https://github.com/GStreamer/gst-rtsp-server/blob/master/examples/test-launch.c (build: libtool --mode=link gcc `pkg-config --cflags --libs gstreamer-1.0` -L/usr/lib/x86_64-linux-gnu -lgstrtspserver-1.0 test-launch.c -o gst-rtsp-launch)

GST_DEBUG=1 ./bin/gst-rtsp-launch "udpsrc port=1234 ! application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H264 ! rtph264depay ! h264parse ! decodebin ! videoconvert ! x264enc ! rtph264pay name=pay0 pt=96 "

Read RTSP stream:

$ gst-launch-1.0 -vvv rtspsrc location=rtsp://127.0.0.1:8554/test ! rtph264depay ! h264parse ! decodebin ! videoconvert ! xvimagesink sync=false

Hi
thanks for the example.

How I can server many clients?

UDP -> RTSP -> CLIENT 1
    \> RTSP -> CLIENT 2

Hi EJ,

I haven't looked at this code in quite a while but I think the RTSP server can support multiple clients, I'd try (per your plot):

UDP -> RTSP -> CLIENT 1
            \> CLIENT 2

I just saw some bug reports that this fails on certain distributions of GStreamer (eg at least one version of Linux4Tegra), but I think it should work -- do you get any specific errors or unexpected behavior with this approach?

Hi @bmount

Thanks you for your comment, I tried this:

UDP -> RTSP -> CLIENT 1
            \> CLIENT 2

But the first client stop the video when the second client start the video. I found that test-launch re play the pipeline for each user connected.

udpsrc port=1234 ! application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H264 ! rtph264depay ! h264parse ! decodebin ! videoconvert ! x264enc ! rtph264pay name=pay0 pt=96 

I think that the problem is that many pipeline can´t read the same UDP port.

Now I'm reading multiudpsink for try another option.