I was wondering if you tried these adapters? I would love to pull old the old coax cable but they are stapled into the framing of the house, so I can't pull it out. I was looking into these and it looks like this might be the most cheapest one out of all, everyone else wanted $500 to $600 for a pair, which is insane if you want to wire up 4 cameras.well; in short an adapter no.. not going to happen; you can get devices that modulate a signal over coax for ethernet networking but they are not affordable and feature rich as ethernet, not a good option unless replacing RG59 with CAT6 is extremely expensive, there made for a niche market of renters in high density apartments with crappy WiFi..
Using adapters is just a band-aid as once you go digital your not going back to analogue.. best option is just to tie some cat6 cable to the end of the coax and start pulling
http://www.amazon.com/Ethernet-Extender-Security-Transmitting-Distance/dp/B00CKY6KEO/ref=pd_sim_sbs_e_4?ie=UTF8&refRID=154YXYFX4R03K5KW BZ2J
Have you tried these before?
Yeah, I asked a guy to wire it up but he said the wires were all stapled in between the walls, so it's really difficult to rip it out and repull it with cat 5e in there. All the walls are sealed unfortunately.
A professional wire guy and run new cable with almost zero damage (maybe an easily patched hole or two, maybe a bit more depending on the structure)...