GStreamer pipeline to show an RTSP stream

user_4496601 0
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I am pretty new to Gstreamer.

I need to write a video client able to stream data from an RTSP source using GStreamer. I configured VLC to stream a video I have on my laptop using RTSP and I want to create a pipeline to get that stream and show it. I tried using playbin and everything works fine. The point is that I need to fine tune the latency used to stream the video but it seems I cannot do that with playbin.

I tried rtspsrc because it allows to work on the latency but I don't know how to show the video on any window. That's the pipeline I created:

gst-launch-1.0 rtspsrc location=rtsp://localhost:8554/test latency=300 ! decodebin ! autovideosink

I get the error "streaming task paused, reason not-negotiated (-4)".

I tried different pipelines after deeply looking on the internet but I definitely miss something. How can I write a gstreamer pipeline to show a video from RTSP?

The final goal is to have a pipeline which can be adjustable at least in terms of latency, so I have two choices:

  • set the latency of playbin element, if possible. (This element correctly shows the video)
  • Show the video with the correct pipeline since rtspsrc allows me to set the latency.

I use Xubuntu 16.04, gstreamer-tools-1.0 (used 0.10 as well) and the video I stream with VLC has mp4 extension.

rtsp gstreamer video
4 Answers

Assume the rtsp stream is h264 format, use explicit h264 decoder and encoder to parse the stream. Use videoconvert and videoscale to change the frame shape. 

gst-launch-1.0 rtspsrc location=rtsp://localhost:8554/test latency=100 ! queue ! rtph264depay ! h264parse ! avdec_h264 ! videoconvert ! videoscale ! video/x-raw,width=640,height=480 ! autovideosink
user_47156610

I've been trying to get this work and was successful on a raspberry pi 3 so I thought "Well since that was so easy I'll try it on the rpi4" Followed the same steps to get gstream installed but when running the command:

gst-launch-1.0 rtspsrc location=rtsp://localhost:8554/test latency=100 ! queue ! rtph264depay ! h264parse ! avdec_h264 ! videoconvert ! videoscale ! video/x-raw,width=640,height=480 ! autovideosink

It looks like a thermal camera. Still works on the rpi3 just fine though. Not sure what would be making the difference here.

user_181921410
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