The problem here is probably that the stream from your camera is not including 
I-frames (i.e., ‘key’ frames, consisting of complete pictures) often enough.  
The captured MP4 file won’t be able to show anything until it sees the first 
(complete) I-frame.

So, I suggest decreasing the “I-frame interval” in each stream that you want to 
capture.

Another thing to keep in mind is that these streams will be very sensitive to 
network packet loss.  Each I-frame will take up many RTP packets, and if even 
one of these RTP packets gets lost on the network, the whole I-frame will be 
unusable.  So, you might also want to play around with decreasing your stream’s 
bit rate.


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/


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