Rather than trying to detect when the RTSP connection closes (which isn't reliable, and might not happen for a long time after the server disappears), a better solution is to arrange for a timer to expire if no data arrives within a certain period of time (e.g., 1 second). This will also detect situations where the camera server remains alive, but has stopped streaming data for some reason.
On way to do this is the create a delayed event - using "TaskScheduler::scheduleDelayedTask()" - for (e.g.) 1 second, after you've received the response to the RTSP "PLAY" command, and then reschedule the event - using "TaskScheduler::rescheduleDelayedTask()" - each time new data arrives. If the delayed event gets called, then you know that no new data has arrived within the delay period (e.g., 1 second). Ross Finlayson Live Networks, Inc. http://www.live555.com/
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