getStreamUri not working correctly on multi channel NVR

[skarotech]

I have an IVSEC NVR, with multiple cameras, the connect process is showing me the multiple profile tokens (via the profiles object)

profile_0_main
profile_0_sub
profile_1_main
profile_1_sub
etc...

and when calling the getStreamUri code (my code)
// Retrieve the RTSP stream URI
cam.getStreamUri({ protocol: 'RTSP'}, (err, stream) => {
if (err) {
console.log('{"rtsp":""}');
return;
}
const rtspUrl = new URL(stream.uri);
const rtspPath = rtspUrl.pathname + rtspUrl.search;
console.log('{"rtsp":"' + rtspPath + '"}');

// Extract RTSP port
const rtspPort = rtspUrl.port || (rtspUrl.protocol === 'rtsp:' ? 554 : '');
console.log('{"rtsp_port":"' + rtspPort + '"}');

});

it returns the default camera streams
{"rtsp":"/rtsp/streaming?channel=1&subtype=0"}
{"rtsp_port":"80"}
{"mjpeg":"/rtsp/streaming?channel=1&subtype=0"}
{"mjpeg_port":"80"}
{"snapshot":"/onvif/snapshot?channel=1"}

HOWEVER when I adjust the code to add in the profile token
eg
cam.getStreamUri({ protocol: 'RTSP' , profileToken: 'profile_1_main'}, (err, stream) => {

I get no streams returned - is this a bug or expected behaviour with the library ?

[RogerHardiman]

When I want the URL for a specific profile make the same call
cam.getStreamURI(opts, (err,steam) => {
// check err
// use stream.uri
}

The issue is likely to be in how you populate the options.
As well as profileToken you need to set 'protocol' and 'stream' in the Options.
For a RTSP stream where the video comes via TCP via the RTSP connection then set protocol to "RTSP" (like you do) and include the 'stream' set to "RTP-Unicast"
For UDP video, you need protocol set to "UDP" and the stream set to "RTP-Unicast"

You can also ask for Multicast and for RTSP over HTTP but will assume you just want these two common ones.

The ONVIF user guide (onvif.org) has a table for what to use for 'protocol' and 'stream'