Can someone tell me how to run DNG validation on folders. I read about it some time ago but can't find where. Jeff Schewe's book, The Digital Negative doesn't cover that. Would like to run it from Adobe Bridge if possible.
Thanks Andrew & Jeff.
My DNG's are SilverFast HDR files on an external drive. They are never in a LR catalog.
Can you tell how to run it from Bridge?
Oh, Lightroom=more better ;D . Re-saving would force every file to be backed up again.
You can’t, you need to open the images in ACR and resave as DNG. Or use Dng Converter to reconvert to DNG.
Oh, Lightroom=more better ;D . Re-saving would force every file to be backed up again.
How do you do this from ACR Jeff?
I can't get that URL from Peter to open on my end.
How do you validate an image open in ACR, gotta rewrite ?
Francisco,
Thanks for the detailed info. I have the PS/LR subscription. There is no reason to import the SF8 dng's to LR cat. I develop them with the SilverFast HDR Studio and then they become .tiff files. After passing them thru PS I import them in LR as the masters.
Looks like I should try the Adobe DNG Converter. Will this create new files? I have 4k slide scans so far and 5k more to do for the project I'm doing. Been using .dng for the validation function. Does Adobe DNG Converter act as a stand alone application?
thanks for your input,
Just created new LRcat. Imported 1 folder [added] of the SF8 dng's. Ran dng validation from Library. Results said Invalid DNG Files 0. Not Validated 117, which was all of them.
So this is confusing and not reliable. So there are no invalid files, yet none are validated.
Will have to consider going thru duplicating 9k files for the validation function via Adobe DNG Converter. The LR masters are tif. Are they not stable files? Then there is always the slides to fall back on.
Thanks again Francisco.+1, good info worth archiving, didn't know ACR did this upon open even though most of my work takes place in LR.
Will try a separate LRcat for this purpose. Will import one folder first to see if SF does have a checksum viable dng. If not will have to consider the Converter route with duplicated files. Ouch!
Francisco,
Just ran the convert to dng function in LR on the above folder. Was fast and was able to validate after. Seems no file duplication is involved.
Thank you for this most useful solution.
Having said that, I checked a few things regarding the DNGs generated by Silverfast. First they are linear DNG or rendered files (not RAW), similar to tif, and it is very likely that the ifrared channel is not kept when you do the conversion.Which may be a bit OT, but I still do not understand why some companies feel the need to 'suggest' that a rendered image, linear or otherwise, stored into the DNG container is useful, it's not raw data.
Given your last reply and Andrew's, it seems the SF implementation of dng is useless if I can't run a validation.Don't know about useless but questionable as to why one would do all this and save off as a DNG. If you have something that would validate a TIFF instead, well that's another compelling reason to save as TIFF rather than DNG which is a very close cousin of TIFF.
Andrew, Is there a tool to verify TIFF files?Yes posted what I’m using earlier.
Andrew, Can you please point to that post. Am very interested. Guess I missed it.
Sent a forum query to LSI asking if validation can be run on there HDR dng's. Will report here if they respond.
Which may be a bit OT, but I still do not understand why some companies feel the need to 'suggest' that a rendered image, linear or otherwise, stored into the DNG container is useful, it's not raw data.
I suppose if the scanning software were limited, one could argue for saving a 'rawer' rendered image to 'fix' later in say Photoshop. But SliverFast is quite good for a global editor of input scans. Call my old fashion, someone who was scanning back when the Leaf 45 first arrived with software that isn't anywhere as robust then, as SilverFast is today. We did all the heavy lifting at the scan stage. That includes working with really lovely and powerful scanning software later like LinoColor, ScanView etc.
You can download the DNG SDK from Adobe. Inside of the included project folders, there are target builds of the command line tool for dng_validate. For example, in the Mac SDK folders:... dng_sdk_1_4/dng_sdk/targets/mac/release64/dng_validate
and Windows:... dng_sdk_1_4\dng_sdk\targets\win\release64\dng_validate.exe
kirk
Is there a tool to verify TIFF files?
Downloaded Fixity for Mac. Created a New Project but it would not recognize my mounted external drive. So I could not select the folder I wanted to use it on. Sent a query via their contact form. It would only show local sources on the Mac.