Nikon D800 NEFs ==> SubIFD Tags corrupted ==> Rewrite possible?

[joedfelipe]

Hi Phil!

This has been an old thread but I'm still desperately finding solutions to my problem . It seems that I'm also experiencing this kind of problem after viewing and rating my Nikon D7000 NEFs in an old version of ViewNX2 directly from the SD card. Only rated images have been 'corrupted' so far. I think this tool (fix_corrupted_nef) would help but it doesn't support the Nikon D7000. Can you make this tool also available for the D7000? I would really appreciate that. Thank you so much! 

Joed

[Phil Harvey]

Hi Joed,

I can implement support for the D7000 if you supply me with a full test set of 8 NEF images.  4 original images and 4 corrupted images with these settings:

1) 12-bit lossless compressed
2) 12-bit compressed
3) 14-bit lossless compressed
4) 14-bit compressed

You can either email these to me (philharvey66 at gmail.com), or upload them to a file sharing utility for me to download.

- Phil

[Phil Harvey]

I got the samples, thanks.

This is not the same problem as the one solved by the fix_corrupted_nef utility.

The metadata for the corrupted image looks fine as far as I can tell (which is what fix_corrupted_nef fixes).

Instead, the raw image data is truncated in the corrupted image you sent, and 3791 bytes are missing.  The raw data is right at the end of the file, so presumably you could just add 3791 bytes to the end of the file and recover most of the raw image.

Also note that even the "original" NEF images you sent were modified by ViewNX 2.0.  This is bad (because Nikon software has a long history of corrupting NEF images and Nikon will give you no support when this happens).  You need to find a download technique that doesn't mess with your files.  I recommend avoiding the Nikon and Windows download utilities since they modify the files.

- Phil

[joedfelipe]

Phil,

Thanks for taking time processing my samples. If that's the problem, how can I add 3791 bytes to the end of the file? I really don't have any idea on how to do that

Btw, I only used copy and paste from my SD card directly to my macbook pro then view it in ViewNX2 (I didn't use Nikon Transfer to download my files. Can the ViewNX 2 modify the image too just by viewing RAW images from it?

Joed

[Phil Harvey]

Hi Joed,

To add random bytes to the end of the file, on a Mac you can do this from the Terminal:

cat ANYFILE >> test.nef

where ANYFILE is any file that is at least 3791 bytes long.

Apparently ViewNX2 writes to the image when you just look at it:

Code Select Expand

> exiftool -software .
======== ./corrupted 14-bit lossless compressed.NEF
Software                        : ViewNX 2.0 M
======== ./original 12-bit compressed.NEF
Software                        : ViewNX 2.0 M
======== ./original 12-bit lossless compressed.NEF
Software                        : ViewNX 2.0 M
======== ./original 14-bit compressed.NEF
Software                        : ViewNX 2.0 M
======== ./original 14-bit lossless compressed.NEF
Software                        : ViewNX 2.0 M
    1 directories scanned
    5 image files read

Bad, bad software.

- Phil

[Alan Clifford]

Apparently ViewNX2 writes to the image when you just look at it:

Phil, that is not something I have been experiencing.

Code Select Expand

======== ./AHC_6325.NEF
Software                        : Ver.1.04
======== ./AHC_6325_cr.NEF
Software                        : ViewNX 2.8 M
======== ./AHC_6325_cr2.NEF
Software                        : ViewNX 2.8 M
======== ./AHC_6326.NEF
Software                        : Ver.1.04
======== ./AHC_6327.NEF
Software                        : Ver.1.04


[Phil Harvey]

Hi Alan,

That is useful information.  Maybe something else is happening then.  (I know it isn't me because I haven't run ViewNX.)

You two are running different versions of ViewNX though.  It's a long shot, but could this be the difference?

- Phil

[Alan Clifford]

I wouldn't like to comment re: the versions.  But I've used that version with the D7000:

Code Select Expand

======== dsc_0108.nef
Software                        : Ver.1.00
======== dsc_0108_crop.nef
Software                        : ViewNX 2.0 M


[kohnecamera]

Hello, I am very novice when it comes to terminal commands on the mac. I am attempting to use this, but when i drag and drop the file(s) that i need to fix, i receive a permission denied error. I am the admin user, I've changed read and write permissions within the "get info" window, but still have this problem. Any help or ideas would be greatly appreciated!
Thanks

[kohnecamera]

Hello, I am very novice when it comes to terminal commands on the mac. I am attempting to use this, but when i drag and drop the file(s) that i need to fix, i receive a permission denied error. I am the admin user, I've changed read and write permissions within the "get info" window, but still have this problem. Any help or ideas would be greatly appreciated!
Thanks

I've fixed my own problem! As usual, one must read the instructions carefully before use. Thanks again for a great program!

[didier]

Hello Phil, iam new here from France.
I got problems with my RAW (NEF) files with my DF Nikon during transferring to my computer.
I will try with your application to restaure my files, i know that it works with the d800 and d4, d600.
Is it working with the new DF ? (df mix of d600 and the d4 captor)
Thanks a lot.
Didier.

[Phil Harvey]

Hi Didier,

No, it doesn't yet work with the DF.  To add support for this, I will need corrupted and uncorrupted images from each of the possible NEF formats written by this camera (all combinations of compression settings and NEF bit depth).  If you email the samples to me (philharvey66 at gmail.com) I will add support for this camera.

- Phil

[Cactus]

Hi Didier,

No, it doesn't yet work with the DF.  To add support for this, I will need corrupted and uncorrupted images from each of the possible NEF formats written by this camera (all combinations of compression settings and NEF bit depth).  If you email the samples to me (philharvey66 at gmail.com) I will add support for this camera.

- Phil

Hi Phil, hi Didier,

great success with D800 (thank very very much!) but the same problem with the Df. Would be really fine if exiftools would help.

Thanks again,
Peter

[Phil Harvey]

Hi Peter,

If you email me the samples, I will add support for this.  (It will take a few weeks though, because I am still technically on vacation now.)

- Phil

[kimequa]

Phil,
I'm not sure if your software is what I need or not. I'm sure you'll know after I explain my problem.

I have the Nikon D7000 camera. I was unaware that I needed a specific compatible memory card, so I bought a cheapo one before my vacation. About half the photos (.nef) and videos (.mov) look great and the other half are corrupted and I cannot see them at all. I have already re-used the memory card a number of times since then (I was on vacation, so every day I uploaded them to my PC) ....but I DO have the corrupted nef files saved on my PC in hopes that I may one day find a fix.

Do you think it's possible to recover any of these using your software or something else?? I did try using your program, but I got an error that says "Not a D4, Df, D600, D610, D750, D800/D800E, D3200, D5200, or D7100 NEF"

Thank you for your help!!