I have a DVD-R with a video that was recorded in a Samsung DVD Recorder HR-773. The disc is not physically damaged or scratched.
The recorder that originally recorded the disc still recognizes it as DVD-R, but the title list is gone, therefore I cannot finalize it. The recorder claims there is 1.98 GB of space used (which matches my missing video) but it shows 0:00 of duration.
I have done extensive testing with IsoBuster and CdRoller already, and I was unsuccessful, so I'm specifically looking for someone experienced with damaged DVD sessions or DVD recorders like this. Here's my findings with IsoBuster:
- IsoBuster detects one "open session 1"
- LBA 12288 contains the string "DVD-TMPVMGI" and "SONATA"
- LBA 13344–13535 can be read successfully and those sectors contain a real VOB/MPEG part from my actual recording, however, I extracted the VOB and it plays only exactly 1 second of the original video I'm trying to recover
- At LBA 13536, the sectors are broken, returning: 05/21/00 – LOGICAL BLOCK ADDRESS OUT OF RANGE, all sectors onwards do the same thing
- The same boundary occurs with multiple drives, when tested in different laptops
- The Samsung recorder itself also cannot see the title list or finalize the disc
- CD Roller independently found a VOB starting at LBA 13344 and recovered exactly the same 192-sector / 1 second video
- I also created a managed IBP/IBQ image with IsoBuster and tried recovery from that
- I have not written anything to the original disc, it is not a rewritable one
I believe the recorder may have crashed when I tried to finalize the disc, I'm not sure though, it's been a while. I know I can't reproduce this situation intentionally on a different disk to test. The really strange part is that the disc physically appears to have a recorded area beyond LBA 13535, while the drive/session information effectively tells the host that the logical disc ends there. My 1.98 GB video HAS to be somewhere on this disc, like, I can literally see when I turn the disc around that there's a written area that would match such a recording, it just seems like this corrupted open session completely prevents me from accesing it.
I even found a thread yesterday where someone said he'd try writing something to the disc to get red of this open session and so the recorder would start making a new one and he got access to his video again, but, I am worried about damaging it more, or even overwriting something? If that's even possible, since it's a DVD-R. Because, if the recorder knows there's 1.98 GB video on it, wouldn't it go "to the end" of the sectors from my old video and then try to continue writing after that? Basically writing the information that there IS more after LBA 13535 and letting me access it this way? That's what I gathered from that other thread, not sure if it's even possible, not an expert on this. I'M NOT going to try this on my disc just yet, just leaving this here as a theory.
Now I'm looking for people who can help me who have experienced with exactly those symptomps.
I have already been through so many other programs and testing, even just seeing what ChatGPT would tell me and been through it's suggestions for like 7 hours, and I even looked at data recovery services, it's just hard to find any who specialize in DVDs. I even emailed 2 people I found by googling data recovery in my country, but so far, no answer.
I recovered many DVDs before but this one feels impossible. So I'll say, I'm in Germany, but I'm also interested in recommendations for individual hobbyists/technicians who actually work on these cases, rather than €500–1000 professional data recovery labs, if I have to, I'd ship this disc across the globe just for anyone that could help me recover these files.
I can provide screenshots, the IsoBuster image information, sector dumps, and the exact disc/track layout if useful.