I agree with Sugarbrie that it sounds like it could possibly be overheating.
Don't assume it is not just because it sounds too simple.
I also agree that burned DVDRs can also be harder to read if some players get too hot.
The second link about a Pioneer player is right on point.
http://forums.audioholics.com/forums/showthread.php?t=15703
http://www.amazon.com/review/product/B00007LD1X/ref=cm_cr_pr_redirect
Don't assume it is not just because it sounds too simple.
I also agree that burned DVDRs can also be harder to read if some players get too hot.
The second link about a Pioneer player is right on point.
http://forums.audioholics.com/forums/showthread.php?t=15703
http://www.amazon.com/review/product/B00007LD1X/ref=cm_cr_pr_redirect