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EXIF-less DNG won't open in ACR

Community Beginner ,
Feb 18, 2017 Feb 18, 2017

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I removed EXIF from a DNG as test but ACR won't open DNG,

also DNG converter won't open it when attempting to convert

DNG ===> DNG in hopes that this would let ACR open it.

How do I get EXIF-less DNG to once again open in ACR???

Manually add some EXIF info?

Copy EXIF info from any other DNG?

Or???  Thanks in advance.

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correct answers 1 Correct answer

Enthusiast , Feb 19, 2017 Feb 19, 2017

As a matter of curiosity, I looked at the DNG. Diagnostics below.

But, in summary, the file is trashed - it hasn't just had it's EXIF data removed, it's been structurally destroyed. Note the various "*** Warning: IFD 0 NewSubFileType has unexpected type (Short) ***" messages, the color matrixes are impossible, etc, etc. My opinion is, there is no way to recover that with any conventional tool. My suggestion - whatever tool created this mess, don't ever use it for anything else ever again.

Processi

...

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LEGEND ,
Feb 18, 2017 Feb 18, 2017

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JeffGreenberg  wrote

I removed EXIF from a DNG as test but ACR won't open DNG,

Manually add some EXIF info?

Copy EXIF info from any other DNG?

Or???  Thanks in advance.

You should try those options.

But why in the world are you messing around deleting, removing, EXIF data from a Digital NeGative file. For what purpose?

By doing so you seem to have destroyed the DNG file.

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Community Beginner ,
Feb 18, 2017 Feb 18, 2017

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> You should try those options.

Thanks.  Am seeking authoritative answer.

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LEGEND ,
Feb 18, 2017 Feb 18, 2017

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Not sure will will receive Authoritative answers because I doubt no one else removes EXIF data from DNG RAW files and then tries to reenter it.

Best of luck to you.

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Community Beginner ,
Feb 18, 2017 Feb 18, 2017

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There are lots of EXIF-deleting programs offered, some free.

And there will be knowledgeable persons knowing solutions.

Patience pays.  Real  answers vs. post padding...

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LEGEND ,
Feb 18, 2017 Feb 18, 2017

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According to Wikipedia, DNG contains mandatory metadata, which - since EXIF is the preferred metadata format in DNG - means you've removed something mandatory. If it contained no important information it wouldn't be mandatory, or so it seems to me. My suggestion, since anyone who tells you this is just a daft thing to do is clearly just padding their post count, is to refer to the DNG specification and make your own determination. http://wwwimages.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec_1.4.0.0.pdf

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Community Beginner ,
Feb 18, 2017 Feb 18, 2017

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Seeking solution, not links to wiki definitions.

Data was deleted using free EXIF Pilot program.

It has delete, export, import functions, etc.

Common sense says these functions are used

for various purposes other than to be unable

to open a cleared DNG with ACR.

Was able to export EXIF+IPTC+XMP from

another "working" DNG, but when I imported

data into nonworking DNG, only the EXIF+IPTC

was imported & got a "can't parse" message

in ACR.  Someone will know, waiting patiently...

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Enthusiast ,
Feb 19, 2017 Feb 19, 2017

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  1. EXIF from just any DNG won't help; it would have to be from the same camera, else all sorts of things won't match.
  2. Adobe's DNG SDK has a DNG Validate app in it; that can tell you specifically what the problems with the DNG are. Alternatively, CornerFix can provide much the same information, if you configure it for "Verbose output".

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Community Beginner ,
Feb 19, 2017 Feb 19, 2017

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> EXIF from any DNG won't help; it would have to be from same camera, else all sorts of things won't match.

What about two bodies, same brand-model, same firmware, etc.?

I assumed only serial #s differ -- is that wrong & there are other issues?

Thanks in advance!

Here's link if others want same:

Adobe - DNG SDK : For Windows : Adobe DNG Software Development Kit (SDK) 1.4 : Thank You

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Enthusiast ,
Feb 19, 2017 Feb 19, 2017

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Same model bodies would be probably be ok. There might be issues with settings; some cameras e.g., change black levels with ISO, etc. But that's rare.

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Community Beginner ,
Feb 19, 2017 Feb 19, 2017

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Thanks for response.

When I downloaded & clicked on "dng_validate.exe" there is no reaction...

What I tried without success, using "EXIF Pilot" free program:

1. export data from working DNG to Excel (also at link)

2. import that Excel data into broken DNG

EXIF Pilot exports IPTC+EXIF+XMP but imports IPTC+EXIF = problem...?

If anyone interested in reporting successful repair & steps taken...?

link to broken & working DNG + Excel data, same camera:

Index of /Working-Broken-DNGs

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Enthusiast ,
Feb 19, 2017 Feb 19, 2017

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As a matter of curiosity, I looked at the DNG. Diagnostics below.

But, in summary, the file is trashed - it hasn't just had it's EXIF data removed, it's been structurally destroyed. Note the various "*** Warning: IFD 0 NewSubFileType has unexpected type (Short) ***" messages, the color matrixes are impossible, etc, etc. My opinion is, there is no way to recover that with any conventional tool. My suggestion - whatever tool created this mess, don't ever use it for anything else ever again.

Processing "/Users/sandy/Downloads/Broken.DNG"...

Uses little-endian byte order

Magic number = 42

IFD 0: Offset = 8, Entries = 30

*** Warning: IFD 0 NewSubFileType has unexpected type (Short) ***

NewSubFileType: Preview Image

BitsPerSample: 8 8 8

Compression: JPEG

PhotometricInterpretation: YCbCr

*** Warning: IFD 0 Make is not NULL terminated ***

Make: "DJI"

*** Warning: IFD 0 Model is not NULL terminated ***

Model: "FC6310"

Orientation: 1 - 0th row is top, 0th column is left

*** Warning: IFD 0 Software is not NULL terminated ***

Software: "v01.02.1478"

*** Warning: IFD 0 DateTime has unexpected count (19) ***

*DateTime:*** Warning: IFD 0 DateTime is not NULL terminated ***

"2017:02:19 10:10:49"

SubIFDs: IFD = 3992 4734

XMP: Count = 3171, Offset = 426

XMP: <?xpacket begin="\357\273\277" id="W5M0MpCehiHzreSzNTczkc9d"?>

XMP: <x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="XMP Core 4.4.0-Exiv2">

XMP:  <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">

XMP:   <rdf:Description rdf:about=""

XMP:     xmlns:xmp="http://ns.adobe.com/xap/1.0/"

XMP:     xmlns:tiff="http://ns.adobe.com/tiff/1.0/"

XMP:     xmlns:dc="http://purl.org/dc/elements/1.1/"

XMP:     xmlns:drone-dji="http://www.dji.com/drone-dji/1.0/"

XMP:     xmlns:crs="http://ns.adobe.com/camera-raw-settings/1.0/"

XMP:    xmp:ModifyDate="2017-02-15"

XMP:    xmp:CreateDate="2017-02-15"

XMP:    tiff:Make="DJI"

XMP:    tiff:Model="FC6310"

XMP:    dc:format="image/dng"

XMP:    drone-dji:AbsoluteAltitude="+15.13"

XMP:    drone-dji:RelativeAltitude="+10.60"

XMP:    drone-dji:GimbalRollDegree="+0.00"

XMP:    drone-dji:GimbalYawDegree="+100.00"

XMP:    drone-dji:GimbalPitchDegree="-12.80"

XMP:    drone-dji:FlightRollDegree="+1.20"

XMP:    drone-dji:FlightYawDegree="+99.90"

XMP:    drone-dji:FlightPitchDegree="+1.70"

XMP:    drone-dji:CamReverse="0"

XMP:    drone-dji:GimbalReverse="0"

XMP:    crs:Version="7.0"

XMP:    crs:HasSettings="False"

XMP:    crs:HasCrop="False"

XMP:    crs:AlreadyApplied="False"/>

XMP:  </rdf:RDF>

XMP: </x:xmpmeta>

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                                                                                                    

XMP:                           

XMP: <?xpacket end="w"?>

ExifIFD: 4926

GPSInfo: 5440

DNGVersion: 1.4.0.0

DNGBackwardVersion: 1.3.0.0

*** Warning: IFD 0 UniqueCameraModel is not NULL terminated ***

UniqueCameraModel: "FC6310"

ColorMatrix1:

      0.7726 429496.4380   0.0118

     -0.4213   1.2198   0.2259

    429496.6820   0.1114   0.6346

ColorMatrix2:

      0.7122 429496.5188 429496.6784

    429496.4140   1.1201   0.2231

     -0.0541   0.1423   0.5045

AnalogBalance: 1.0000 1.0000 1.0000

*** Warning: IFD 0 AsShotNeutral has unexpected type (Short) ***

AsShotNeutral: 45656.0000 6.0000 16960.0000

BaselineExposure: +0.00

BaselineNoise: 1.00

BaselineSharpness: 1.00

LinearResponseLimit: 1.00

*** Warning: IFD 0 CameraSerialNumber is not NULL terminated ***

CameraSerialNumber: "62294316f246cc08efe5a270c8184a35"

*** Warning: IFD 0 LensInfo has unexpected count (2) ***

*LensInfo: Rational = 24/1 24/1

*** Warning: IFD 0 ShadowScale has unexpected type (SRational) ***

ShadowScale: 1.0000

DNGPrivateData: Count = 125, Offset = 3866

    44 4a 49 20 00 00 00 00 00 00 00 00 00 00 00 00    DJI ............

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

    00 00 00 00 00 00 00 00 00 00 00 00 00             .............  

CalibrationIlluminant1: Standard light A

CalibrationIlluminant2: D65

NextIFD = 5604

Chained IFD 1: Offset = 5604, Entries = 3

Compression: Old JPEG

JPEGInterchangeFormat: 5646

JPEGInterchangeFormatLength: 3070

NextIFD = 0

SubIFD 1: Offset = 3992, Entries = 28

NewSubFileType: Main Image

ImageWidth: 5472

ImageLength: 3648

BitsPerSample: 16

Compression: Uncompressed

PhotometricInterpretation: CFA

StripOffsets: Offset = 8716

SamplesPerPixel: 1

RowsPerStrip: 3648

StripByteCounts: Count = 39923712

PlanarConfiguration: 1

CFARepeatPatternDim: Rows = 2, Cols = 2

CFAPattern:

    Red      Green

    Green    Blue

CFAPlaneColor: Red Green Blue

CFALayout: Rectangular (or square) layout

BlackLevelRepeatDim: Rows = 2, Cols = 2

BlackLevel:

     3195.00  3190.00

     3190.00  3194.00

WhiteLevel: 65535

DefaultScale: H = 1.0000 V = 1.0000

DefaultCropOrigin: H = 4.00 V = 4.00

DefaultCropSize: H = 5464.00 V = 3640.00

BayerGreenSplit: 0

AntiAliasStrength: 1.00

BestQualityScale: 1.0000

ActiveArea: T = 0 L = 0 B = 3648 R = 5472

OpcodeList1: count = 0, offset = 4302

OpcodeList3: count = 256, offset = 4446

DefaultUserCrop: T = 0.00 L = 0.00 B = 1.00 R = 1.00

NextIFD = 0

SubIFD 2: Offset = 4734, Entries = 9

*** Warning: SubIFD 2 NewSubFileType has unexpected type (Short) ***

NewSubFileType: Preview Image

BitsPerSample: 8 8 8

Compression: JPEG

PhotometricInterpretation: YCbCr

PlanarConfiguration: 1

YCbCrCoefficients: R = 0.299, G = 0.587, B = 0.114

YCbCrSubSampling: H = 2, V = 2

YCbCrPositioning: 2

ReferenceBlackWhite: 0.0 255.0 128.0 255.0 128.0 255.0

NextIFD = 0

Exif IFD: Offset = 4926, Entries = 29

ExposureTime: 1/30.0 sec

FNumber: f/2.80

ExposureProgram: Program Normal

ISOSpeedRatings: 320

ExifVersion: 2.30

*** Warning: Exif IFD DateTimeOriginal has unexpected count (19) ***

*DateTimeOriginal:*** Warning: Exif IFD DateTimeOriginal is not NULL terminated ***

"2017:02:19 10:10:49"

*** Warning: Exif IFD DateTimeDigitized has unexpected count (19) ***

*DateTimeDigitized:*** Warning: Exif IFD DateTimeDigitized is not NULL terminated ***

"2017:02:19 10:10:49"

ShutterSpeedValue: 0.50 sec

*** Warning: The ExposureTime and ShutterSpeedValue tags have conflicting values ***

ApertureValue: f/2.80

ExposureBiasValue: 0.66

MaxApertureValue: f/2.8

SubjectDistance: 0/1

MeteringMode: CenterWeightedAverage

LightSource: Unknown

Flash: 32

    No flash function

FocalLength: 8.8 mm

CustomRendered: Normal process

ExposureMode: Auto exposure

WhiteBalance: Auto white balance

DigitalZoomRatio: Not used

FocalLengthIn35mmFilm: 24 mm

SceneCaptureType: Standard

GainControl: None

Contrast: Normal

Saturation: Normal

Sharpness: Normal

SubjectDistanceRange: Unknown

*** Warning: Exif IFD CameraSerialNumberExif is not NULL terminated ***

CameraSerialNumberExif: "62294316f246cc08efe5a270c8184a35"

*** Warning: Exif IFD LensSpecificationExif has unexpected count (2) ***

*LensSpecificationExif: Rational = 24/1 24/1

NextIFD = 0

GPS IFD: Offset = 5440, Entries = 8

GPSVersionID: 2.0.0.0

*** Warning: GPS IFD GPSLatitudeRef is not NULL terminated ***

GPSLatitudeRef: "N"

GPSLatitude: 0.0000 0.0000 0.0000

*** Warning: GPS IFD GPSLongitudeRef is not NULL terminated ***

GPSLongitudeRef: "E"

GPSLongitude: 0.0000 0.0000 0.0000

GPSAltitudeRef: Sea level reference (negative value)

GPSAltitude: 35.4400

*** Warning: GPS IFD GPSMapDatum is not NULL terminated ***

GPSMapDatum: "WGS-84"

NextIFD = 0

*** Warning: This file has Chained IFDs, which will be ignored by DNG readers ***

No decodable MakerNotes found

*** Error: Missing or invalid ImageWidth (IFD 0) ***

*** Error: Missing or invalid ImageWidth (SubIFD 2) ***

*** Error: Matrix math error ***

*** Error: ColorMatrix1 is not invertable ***

*** Error: File format is invalid ***

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Community Beginner ,
Feb 19, 2017 Feb 19, 2017

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Thanks!  Data was deleted with EXIF Pilot free program.

I have questioned them directly -- they seem to be based in (gulp) Serbia!!!

From this point on I will only delete EXIF in JPGs before submitting to agencies.

(only some images for various reasons)

The big mistake was deleting from DNG, not JPG very last step after processing...

Just used EXIF Pilot on JPGs from some good DNGs

to clear EXIF-XMP & they did NOT break!!!

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LEGEND ,
Feb 19, 2017 Feb 19, 2017

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Good luck with that.

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