DVD recorders are present in home computers routinely. If you want to record shows that you have saved, I would think you could do it with your home theater PC that acts as a DVR and saves programs to the hard disk for later playback. It's got to be just a matter of software that packages the saved files in DVD format and copies to the DVD media.
That, or stream the shows recorded on your existing DVR to the hard drive on your home computer. From there, you record onto DVD. If your DVR does not support streaming to another device (via USB typically), then you are kind of stuck with hacking the DVR so it will stream, buying a different DVR setup that will allow you to stream data, or start erasing old programs from your DVR so you can load more programs.
Last edited by timgr; 12-Nov-2015 at 10:47 PM.