> The setup:
> Hikvision and Vivitek IP cameras, feeding RTSP streams; proxied by 
> live555ProxyServer; viewed with VLC.

Make sure you’re using an up-to-date version of VLC.

> When I connect directly the the cameras, the video comes up almost 
> immediately (<1s). When I connect via the proxy, it takes between 15-30s 
> before the video comes up, depending on the resolution of the proxied stream. 
> Changing the I-frame rate on the cameras does not seem to affect this startup 
> time.
> (1) Is this normal? 


> (2) If not, how do I go about debugging the problem? Any hints on what might 
> be wrong? 

Unfortunately not.  (Increasing the I-frame rate is what I would have 

The first thing I’d try is using “openRTSP” <http://www.live555.com/openRTSP/> 
as a client (instead of VLC).  Try recording the stream, both directly from the 
camera, and via the proxy server.  In each case, rename the saved video file to 
have a “.h264” filename suffix, and try playing it with VLC.

Also, please run the proxy server with the -V option, and send us the 
diagnostic output, so we can see if there’s anything unusual in the RTSP 
“DESCRIBE” response from the camera.

Ross Finlayson
Live Networks, Inc.

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