Some cameras may sync others, they have a genlock output.

Francisco


Douglas Butler wrote:

>>Hi
>>
>>I build a video switcher between 2-3 cameras. my problem is when each camera
>>is switched the picture is not stable, there's a "flick" on the monitor.
>>after 0.5 sec it become stable.
>>can I prevent this behavior? how can I make the switching "smoother"?
>>
>>Regards
>>
>>Tal Bejerano
>>AMC - ISRAEL
>>
>
>What you need is to "genlock" to cameras.  Your cameras are out of
>synchronization with each other, so when you switch, the camera has to
>re-synchronize with the new video signal.  The only way to avoid this is
>to get the video signals all synchronized together.
>
>The easy way to do this is to generate a master sync and use it to drive
>the cameras.  A horrible way is to digitize and buffer the video streams
>as they come in, and read them out of the buffers in sync.  There is
>specialized video gear to do this.  Search for "genlock" equipment.
>
>Sherpa Doug
>
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