Your problem is the type of blank DVD you are using. The DRC8312 is an old recorder that isn't compatible with cheaply manufactured disks, and some multi-speed disks. I've found that Verbatim brand disks work VERY well with the DRC8312. Specifically I've had 100% good luck with Verbatim 8x 4.7 GB DVD+R Digital Movie Spindle blank media. They are gaudy looking, but they always work in my recorder. They're available on Amazon--BUY THEM!!!! They work great. RCA originally shipped this recorder with Verbatim disks.
On a side note, a spindle of 25 Memorex DVD+R disks purchased in 2008 worked fine with this recorder, but an identical spindle purchased in 2009 won't work period--I had leftover '08 disks that worked on the same day that the '09 disks wouldn't. Memorex changed some manufacturing specification and those disks are no longer compatible.
