[direwolf-pgh]

data recovery from a DVD/CD

if the data is corrupt ..it occurred when the disc was written
data doesnt change on this type of media - it can become damaged & unreadable.

if you are seeing "garbage" and/or odd files, I would test the discs on another DVD drive.
either way, you are due for a new burner.

a data recovery program will not help in your situation.
it can either be read or it cant.