Support Center

Advanced Camera Connection Troubleshooting with VLC

Last Updated: Jan 31, 2017 03:39PM PST

When trying to add cameras, either manually or automatically, to the NLSS Gateway or to the NLSS Decoder, there are occasional issues with getting video streams from these cameras.  There are a number of ways we can try to assess the entire communication path (camera to network to gateway / decoder) and figure out where the issue is.

Hardware Affected: GW5000, GW4500, GW4000, GW3000, GW500, DC400, DC400-2
Software Affected: All    
 Determine the issue 

  First, we need to determine what, precisely, the issue is.  Can we simply not connect to the camera, or can we only connect occasionally (occasional connections rule out credentials as a problem).   

 Second, we need to determine our environment.  Are we operating on a simple Local Area Network (LAN), or are we operating in a routed environment, such that the camera and the decoder or gateway are not on the same LAN.  Perhaps, even, we are trying to stream video across the internet.  It’s best to fully document the IP addresses / subnet masks and default gateways of each of our devices for troubleshooting later, if necessary. 

 Once we have these two items figured out and documented, we can move onto actual troubleshooting 

  3rd Party Tools are our friends 

  VLC ( is one of the most useful software tools we have to help troubleshoot issues with decoder / gateway video streaming.  It requests video and interacts with cameras in exactly the same manner as as NLSS devices, so if we are able to get video to work from VLC, then we can quickly determine that the issue may be on the gateway side.  Download VLC and install it on the computer. 

 Ensure that our computer is plugged into the same network segment as the decoder or gateway.  For example, if the decoder was plugged in with the IP address of and our computer is plugged into the same switch and gets an ip address of, then it is on the same network segment and the test with VLC should work. 

 With VLC opened, choose File → Open Network.​ 

 Enter the appropriate RTSP URL for the camera.  This URL varies depending on the camera manufacturer.  A comprehensive list of RTSP URL’s can be found at Soleratec (  If the camera model is not listed here, then we may want to reach out to the camera manufacturer to obtain the correct URL.  If the camera model is listed, but there is no URL available, then RTSP streaming may not work with that camera. 


 Once the URL is entered, click “openâ€�.  Either video will start playing, or we will be prompted to enter credentials. 


 If we see video and motion within the images looks smooth or otherwise as we’d expect it to look, then we’ve determined the camera is working correctly and the network is capable of supporting the stream that is being sent. 

Try the NLSS Gateway or Decoder 

  Now that we’ve determined the camera and network actually work, we can go back to the NLSS Gateway or decoder and try to stream video again. 

 Try adding a stream to either the decoder or the gateway using the very same RTSP URL we used previously.  If we are still unable to get video to work, then please reach out to nlss support: 


  It is important to note that if we are using the NLSS Decoder, we may encounter issues with getting a video stream that is over 1080p in resolution (1920x1080).  Many cameras made by Arecont Vision are multi-megapixel, and thus stream resolutions that the decoder is not capable of natively displaying.  In order to get Arecont cameras to stream to a decoder, we must request a resolution from the camera that is less than 1920x1080. 

  Contact Information 

For more information, please see or email

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