If you have plans for workflows like this. I’d suggest investing in much faster hardware. This will do it, but if you plan on doing a lot of transcoding in the background or rewriting mpeg files after each recording finishes, you’ll hit the limits of this thing pretty fast.
This is more of a great cheap piece of hardware to just run Channels DVR without a lot of hacks.
I’d probably suggest investing in something more robust and fast with more ram and have it be your permanent media server that can host Channels DVR and Plex for all your other movies etc that can run lots of stuff in the background. You can get a pretty solid Intel NUC setup with an i5 and drop 8gb of ram in it for around $500 or so. Something like that will give you the headroom to do these types of things and room to grow.