Discs were clean and if there was any error it was during the verification process (for both discs) which said “Check Condintion” and “Un Correctable Error”. But it burned and the everything seems to be on there. All special features and menus work wonderfully and most of each film plays fine until a certain section that literally won’t do anything but freeze every 2 seconds.
That’s the point of verification, to verify if the burn was good… meaning that even if the disc finished burning, if it doesn’t verify then something went wrong in the burning process (not that the verification process is bad at comparing burned data to source data)… Sure, perhaps not everything on the disc is fully corrupt and unreadable, but at no point should you have been surprised to find issues on a disc that failed verification.
What you should do at this point (in addition to buying better media), is to take a harder look at what you’re dealing with and what steps you took. What model Pioneer burner are you using, is there a firmware update for that model (a lot of media compatibility is added over time this way)? What speed did you burn at? Was it the maximum speed? If so, try it again on the slowest option available (this helps more than you’d think) (look at the dye of a fast and slow burned disc sometime, you’ll see a lot of inconsistent colors on the fast disc that you don’t see on the slow burned disc) (yes it’ll take a while, but you’re archiving here…).
Also, I’m not sure if this applies to double layer Blu-ray discs, but be aware that there’s more than one standard out there, with LTH (low to high reflectivity, which is the opposite of normal BD-R) discs being cheaper to produce but less compatible with older players and burners. In short, find out what your specific burner is known to work well with, not just what brands have worked for others here with different burners.