Quicktime Broadcaster intermittently stops broadcasting/recording video

I have been using QTB to broadcast and simultaneously record live events lasting about one hour.
I am using QTB installed on a Mac mini. An Elgato Turbo.264 HD device is used for encoding.
Video feed is from my Panasonic AGDVC30 camera. Audio is input from the microphone feed.
Most of the time this works without problem. But intermittently, for no apparent reason I find that the video feed "freezes" and that last frozen video frame is both recorded and broadcast as a still image in place of live video. The audio continues to be broadcast and recorded just fine. So as a final movie product I often have a few seconds of audio and video followed by an hours worth of audio superimposed on a static image.
I need help determining what is likely to be the cause of the loss of live video. Do I have my video broadcast parameters set too high? Am I overwhelming the processors in my Mac mini? I don't even know where to start to troubleshoot this problem.
Any help is greatly appreciated.
John

CMCSK wrote:
Have you read Broadcasters tutorial and FAQ website?
Ahhh, as a matter of fact I have. What's your point? If you have something in the way of help to offer I would appreciate it. Where in particular in the QTB tutorials and/or FAQ is there anything that deals with the question I've raised? If you could point me to such information then your input would be helpful.
I am quite familiar with the QTB technology. I've been successfully streaming live video for nearly a year. I have a specific new problem that I need help with. And as far as I can tell there is nothing in the Apple documentation that specifically addresses this problem. That is why I am here seeking help.
John

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