Check integrity of a large folder of image files

[hjulenissen]

Hi all

I have used the "search for missing files" of Lightroom with great success.

I'd like another, similar function. I have considered doing it myself using batch and dcraw, but if I prefer being lazy: scan a folder (and all subfolders) for image files (jpeg and cr2 in my case), attempt to read them, and generate a list of all files that threw errors/warnings upon opening.

The reason that I am asking is that I have found a raw file that has been (added but unused) in my lightroom folder for years that I am now unable to open. Who knows what happened (failed copy from disk-to-disk, disk-rot, radiation from outer space...), but instead of manually opening 30000 images, I'd like to know the state of all of my files.

-h

[Nigel Johnson]

H

You could use Marc Rochkind's ImageVerifier to test the files - see http://basepath.com/site/detail-ImageVerifier.php.

Regards,
Nigel

[hjulenissen]

H

You could use Marc Rochkind's ImageVerifier to test the files - see http://basepath.com/site/detail-ImageVerifier.php.

Regards,
Nigel

Thank you, this seems like just the tool I was looking for. Did you try it yourself (kind of sad if some tool actually mess with all of my image files).

It seems that it is available in a package for $40, or stand-alone for $9.99 mac-only?

-h

[john beardsworth]

For what it's worth I would trust Marc's work. I've not tried that app but have others by him.

[jonathan.lipkin]

Image Verifier is great, and Marc is very responsive to questions. From what I understand, it is simply a front-end to Adobe DNG Converter, which maintains a database of what files have been checked. You run it on a folder, it opens each file in DNG converter, then logs the results. When you run again, it looks at a checksum to see if the file has changed since last verified. It works quite well, though there are some false negatives when checking TIFF files.