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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