I've worked with companies designing such things. However you left out critical details for me to tell you specific steps. The good news is that the companies that made such supplied their tech support with the answer on how to do this.
But since no one tells the make and model I'm going to only respond with the GENERIC answer. Here it is.
Step 1. Move the video to your PC. It does NOT matter what compression at this step since your spec of "DVD" forces what happens next.
Step 2. Go get DVDSANTA (google.com). The demo is free and you can make a DVD from your file in step 1.
We are done. And we didn't have to deal with compression since it's going to DVD and that is a standard.
Bob
Hi,
I have an 8/16-Channel DVR with 8 CCTV cameras that I use for recording animal behavior experiments. I can view the video files/event on my PC through an ethernet connection and using the viewing software (Network Viewer) that came with the DVR. I can also view the videos directly from the DVR on a small TV that I have connected to the DVR.
I would like to compress the files and save the events to DVDs. Is there any way to do this? The events come up as a long list (i.e. not individual events) when I try to look at the harddrive directly through my laptop. The video events seem to be "locked" in the hard drive unless I am viewing them through my laptop and the Network Viewer Software or I view them through the DVR.
I really don't have the vocabulary to ask this question properly. Sorry. Hopefully someone can see through my confusion and offer some advise to help!
Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic