Convert Analogue signal to digital I am not sure if this is the place to post this type of question. If it is not I will delete.

At present I have 4 analogue cameras 'talking' to my DVR.

I want to unplug 1 of these cameras from the DVR and connect it directly to my PC.
Is there a typical analogue to digital converter I can use?

The analogue cables endpoint is a balun.

If this is not the correct forum then I would be grateful to be told what is the correct forum?

Thanks
You need a video capture device or a capture card. It will encode the analog video and audio into digital codecs (like H264 for video and AAC for audio, or other codecs depending on your needs and price range).