Video level meter.

Hello chaps.

Looking for some starting guidance on creating a video level meter for use on CCTV video signals.

I'm looking to read the video level and sync level of a video signal then display the results on a LCD as a pk-pk voltage level. A good tool to have for a CCTV engineer.

Can anyone give me some advice on how to read such a signal?

I will be using the UNO for this handheld tool.

Many thanks.