Re: Disney Phineas and Ferb: Across the 2nd Dimens

Yes I discovered the same issue yesterday, and tried modifying the offset for 00013 to be 0x271a66 from 0x20049e, and as you have also discovered these files are not contiguous.

I ended up reading up ISO 9660 and multi-extent, which from my understanding should produce contiguous file in the iso.

If you extract the 2 files from the original redump iso, do they have valid md5s? I guess they must as Vimm produced his JB files from the redump iso. In which case the dump is good and we need to rethink the IRD format.

Still think this would violate the ISO 9660 format.

I'm currently manually hacking with a hex editor the encrypted ISO to move the blocks around in these 2 files to try to match the reduump ISO.

If you can redump the original disk that would be great. Main thing is the ISO header block.

Regards Oakhead69

I've been playing with this disc a ton and while I have an idea of what's going on I'm no closer to solving it. If you produce an IRD using Redump2IRD you get the exact same hashes for the files. I managed to produce the files with the hashes matching the IRD using the redump disc, but they are clearly junk and still don't rebuild.

Here's the fundamental issue: On the redump disc itself (and in the IRD!), file 00019.M2TS is 2.62 GB starting at sector 18f320. The next file in order is 00013.M2TS, which is 2.51 GB and starts at sector 20049e. But here is the problem: sectors are only 2048 bytes each meaning there is not enough room for 00013.M2TS. The next file in line is 00014.M2TS which is wayyy over in sector 4202C0. There is exactly enough room on the disc for both 00013 and 00013 before getting to 00014.

So what does the disc look like? Starting at sector 18f320, it's byte-for-byte the same as the file 00019.m2ts which we would expect since it's not encrypted. As soon as you get to sector 20049e, you start to see file 00013.m2ts being written. And then the disc continues to seemingly at random write the remaining parts of 00019.m2ts and 00013.m2ts combined until you get to 00014.

So, I'm 95% sure this is a bad dump by redump. Some of the members have been a little concerned that hybrid discs (such as these) may not have been dumped correctly, so I'll try to dump it again and see what I can come up with.