AVR-Chat

Hi guys, I have a curly one, any creative suggestions would be
appreciated.

Im interested in digitzing a B/W video waveform from a standard CMOS
security camera, im only really interested in one line of video but
the conversion time of the average AVR A2D is around 13-50us but the
whole video frame is around 50us. 

I know I can overclock the AVR A2D to around 1MHz, but that still
would only give 4 conversions per video frame.

So, a few ways that I could see around the problem is:

1. Faster external ADC -> Not ideal because it adds cost, componets
and it's hard to get hold of Megasample ADCs. Also, having a fast
external ADC is useless unless you can communicate with it at super speed.

2. Slow down "time" somehow so that I buffer a frame of video
"somehow" and convert it at my leasure using the inbuilt ADC. <- This
method requires "magic" and im not sure what type ? maybe someone has
come across some way of doing this ?

3. Use some of the "line" cameras that allow me to clock the video
data out pixel by pixel. <- I can do this, and we even have the
cameras available @ work, but I would prefer to use a off-the-shelf
cheap video camera.

Any other ideas?

Thanks !

Hein B
Auckland, New Zealand.