I have a third party application that reads data from a thermal camera and generates a RTP stream to a given UDP source. I am trying to wrap this RTP into a RTSP stream but I am running into problems...
The third party application basically runs gstreamer with this command
appsrc format=GST_FORMAT_TIME is-live=true block=true caps=video/x-raw,width=640,height=480,format=GRAY8,clock-rate=90000,framerate=10/1 ! openjpegenc ! rtpj2kpay ! udpsink host=127.0.0.1 port=3000
Using the command below I can visualize the stream on my machine
gst-launch-1.0 udpsrc port=3000 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG2000, sampling=(string)GRAYSCALE, width=(int)640, height=(int)480, payload=(int)96" ! queue ! rtpj2kdepay ! openjpegdec ! videoconvert ! xvimagesink
However when trying to use the default RTP to RTSP application example using https://github.com/freedesktop/gstreamer-gst-rtsp-server/blob/master/examples/test-launch.c to just forward it with a RTSP container the connection fails with VLC. Command below:
./rtp-src-to-rtsp '( udpsrc port=3000 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG2000, sampling=(string)GRAYSCALE, width=(int)640, height=(int)480, payload=(int)96" ! queue ! rtpj2kdepay ! rtpj2kpay )'
Any light on what I am doing wrong? VLC gives only a non-descriptive error
live555 error: Nothing to play for rtsp://{IP}:{PORT}/test
It might be a lack of support of J2K in VLC (I'm using revision 3.0.8-0). Simulating your source with:
gst-launch-1.0 videotestsrc ! video/x-raw,width=640,height=480,framerate=10/1,format=GRAY8 ! openjpegenc ! rtpj2kpay ! udpsink host=127.0.0.1 port=3000
and relaying as RSTP with:
./test-launch "udpsrc port=3000 auto-multicast=0 ! application/x-rtp,encoding-name=JPEG2000,sampling=GRAYSCALE ! queue ! rtpj2kdepay ! image/x-jpc ! jpeg2000parse ! rtpj2kpay name=pay0 "
works on Linux with X using:
gst-launch-1.0 rtspsrc location=rtsp://127.0.0.1:8554/test ! application/x-rtp, encoding-name=JPEG2000,sampling=GRAYSCALE ! rtpj2kdepay ! jpeg2000parse ! openjpegdec ! videoconvert ! xvimagesink -v
Though, I haven't been able to receive with VLC, nor able to make a correct J2K/RTP SDP for VLC nor ffmpeg. Someone better skilled may further advise.