Hello,
I need help!!
I have just finished filming a film with a 19 days schedule in Russia. We used 2 cameras, Blackmagic4k and FujifilmX. The DOP backed up the data to 3 harddisks, one original and 2 backups (harddisks 1, 2, 3). Since the data was more than 5 TBs, he backed up days 17, 18 & 19 on different harddisks (hardisks 4, 5, 6).
We played back all footage on location in the cameras, and everything played fine.
The problem is that when we started edit, all footage from the Fujifilm Camera from days 17, 18 & 19 on harddisks 4, 5, 6 was corrupt. (Footage from Blackmagic and Fujifilm for days 1-16 on harddisks 1, 2, 3 is fine. Footage from Blackmagic on harddisks 4, 5, 6 is fine.)
Days 17, 18 and 19 were the most expensive as they had action scenes, and the Fujifilm camera filmed most of the moving shots.
Here are examples of files that are corrupt. The videos start playing and then most frames are corrupted -
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https://drive.google.com/file/d/1-M7e9wTomzuH_BQMSy-AqT2gZydARouE/view?usp=sharing
https://drive.google.com/file/d/112G40f8KmMWNXW3knPiOO4RH3B4a0S5T/view?usp=sharing
https://drive.google.com/file/d/1vR0HLgarxn1CnoCw43PrW867tK-iGbtw/view?usp=sharing
https://drive.google.com/file/d/1XbaSMdYThCrBiAUyzOR_J6gPihbnme9n/view?usp=sharing
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Is there any way to UN-Corrupt the files?
(I tried some video repair software I found on google but they did not help!)
(Re-Filming is NOT an option due to budget constraints!)
Any help appreciated!
Neole
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You could try untrunc
https://github.com/anthwlock/untrunc
You have to provide a working sample from the same camera with the same specs. -
The fact that the camera playback was fine leads me to the corruption could have been on your 4, 5, 6 hard drives. It could be drive data corruption, I would try isobuster, it's not free but, I've had success with it in the past. If the failure occurred between the camera and the drives I'm afraid it's not recoverable.
It's not important the problem be solved, only that the blame for the mistake is assigned correctly -
hopefully you aren't stupid and still have the original files from the fujifilmx on sd cards. no? too bad, hopefully a lesson learned.
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"a lot of people are better dead" - prisoner KSC2-303 -
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"a lot of people are better dead" - prisoner KSC2-303 -
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The site says - "Note: Restore.Media repairs only damaged video and audio files which you can't open in a media player. If you have a playable video with distortions, freezes, or artifacts, we can't help fixing that, unfortunately."
Mine plays, but with distortions, freezes, or artifacts. I will try it anyway. -
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Desktop-PC with Windows I suppose. We had several problems in the past with copying very large files with Windows Explorer that sometimes causes biterrors, only if files are bigger than about 200GB. It is said this happens only with windows 7, but there is no guarantee. What software did you use for copying? Win10? Explorer?
I am not sure I can help, only try to recapitulate the whole thing, maybe some possibily pops up when we know the very exact course of events.
Inside the files do not look corrupted, at least no longer zero-chains. -
OP, it would help if you included more details about the hardware and software that you are using.
Were any of the hard drives (4, 5 and 6) Western Digital drives? I ask because some of them had a very annoying powersaving feature programmed into their firmware.
When copying very large files to the drive, say 4GB+, Windows does not immediately move the data across. Instead, it does some internal house keeping (like calculate time needed, allocating space etc). During this delay the hard drive would timeout and enter hardware powersaving mode so that when Windows does start to write data to the drive it does not spinup and turn on fast enough to receive the data. Data corruption would usually occurs due to this.
Western Digital supplied a tool called WDIDLE3 to turn off powersaving - it can found on the Ultimate BootCD utility. -
That's what you get by letting the DOP do IT tasks.
Before doing backups you need to create the checksums files, then double check them after copying is done, then backups are safely done and originals can be deleted.
There is a small possibility that files can be repaired, "Harddisk 4" needs to be inspected, but again, that is a task for the IT guy.Last edited by VoodooFX; 4th Dec 2021 at 02:33.
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So you copied files (that are even larger than the corrupted) without problems on the same harddisk as the ones that are corrupted.
Also the error didn't occur on the camera, because you watched and tested there without problems.
The copying process also was exactly the same.
The only possible problems remaining seem to me:
-SSD cards (different?)
-Handling of SSD cards before copying
-Reading of the SSD cards (problems with one kind, none with the other kind)
I know, that doesn't help much, just trying. -
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Restore.Media did get back very quickly -
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Hello,
We have analyzed your files.
They have valid headers and indices.
But the media data is damaged too much.
Some parts of files are filled with a junk data.
It seems your storage devices just failed.
Unfortunately it is impossible to reconstruct missing/damaged frames. Sorry.
We can remux these files to drop damaged frames and keep only valid frames.
But these files will be useless.
Sincerely,
Your Restore.Media Team
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I think I will have to just give up on these files and work with the footage from the Blackmagic camera for the scenes filmed on the last 3 days. The static shots will not have the desired impact, but I hope we can get usable edits. -
In future, I recommend NOT using straight OS tools to copy, but rather something dedicated like TeraCopy which can do checksums and verification as part of the task.
The other thing to think about that might work well is not copying merely files, but the disc image. It is handy, specifically in referencing clips by source media id during editing.
These obviously won't help for these unfortunate clips, but could help for subsequent productions.
Also, having had similar production challenges, I have found it prudent to do backup disc integrity checks daily, perhaps even more often, and SSD/SD card tests EVERY time those are to be rotated back into service. If you do a round-robin of media, a 3:1 or 4:1 ratio works well (recording, uploading+verifying, reformatting+testing, staging).
ScottLast edited by Cornucopia; 4th Dec 2021 at 13:18.
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