Example for reading an RTSP stream and republishing all tracks to a server

[kaiiorg]

This may be a weird usecase, but I'm trying to use gortsplib to read an RTSP stream from a camera, then publish it to an endpoint configured on rtsp-simple-server. I've attempted to do so myself, but my naive attempt isn't working correctly. See kaiiorg/client-read-publish. For the record, I'm new to Go, so I may have committed some cardinal sin without realizing; sorry for that.

Additional information:

1. I'm using rtsp-simple-server 0.17.13.
2. rtsp-simple-server's config is the default provided with the linux binary, but the paths key was modified:

   paths:
   PublishedStream:
   source: publisher
   ExampleStream:
   # Just using rtsp-simple-server for consistency, a realistic usage would be connecting directly to a camera.
   source: rtsp://admin:PASSWORD@192.168.62.197/media/video1

3. ffplay works when I stream the ExampleStream:
   • ffplay.exe -x 500 -rtsp_transport tcp "rtsp://192.168.62.145:8554/ExampleStream"
   • 
4. ffplay does not work when I attempt to stream my republished stream:
   • ffplay.exe -x 500 -rtsp_transport tcp "rtsp://192.168.62.145:8554/PublishedStream"
   • 
     5. Setting both rtsp-simple-server and my test program to use TCP as the transport makes no change

Full Usecase

One of the requirements of the program I'm writing is to:

1. Get request via HTTP or MQTT
2. Read the stream from the IP camera
   • This may require adding a header to the RTSP request(s) to stream stored files on the camera instead of the live stream. Its weird, I know.
3. Publish the stream to an instance of rtsp-simple-server. The publish url would be in the HTTP/MQTT message. This issue would handle parts of 2 and 3.

[kaiiorg]

Today, I tried using the unmodified client-publish-h264 example, publishing to rtsp-simple-server, and am getting the same errors and similar image distortion via both ffplay and vlc.

[aler9]

Hello, this can be done with gortsplib with a little work, but in my opinion a simpler solutions consists in using ffmpeg, that allows to perform this without writing any code:

ffmpeg -re -i rtsp://original-camera -c copy -f rtsp rtsp://rtsp-server

[kaiiorg]

I'll see if I can get that to work, but it might be better for my particular usecase if I don't have any additional binaries or subprocesses to worry about. I don't have a lot of flash space available to me and the third party I'm working with should be given as few components as I can manage.

[aler9]

A working example that shows how to read and republish tracks has been added here.

[kaiiorg]

Awesome. Thanks!

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