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Mavic Air DNG files error
2589 31 2018-2-19
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Ste_427
Second Officer
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Hi guys,
i'm loving my Mavic Air, but I have a problem with DNG files.
I can't open them, no matther what app/program i'm using.
I've tried with both my MacBook Pro (2017, fully updated) and my iMac (old, 2009, but fully updated too) and none of them can open any of the raw photos i'm getting with the Mavic Air.
I've purchased some additional apps and plugins just to be sure that the problem was not on my macs, and everything failed to recognize those files.

Does anyone gets the same problem?
I read about similar problems for some Mavic Pros, but never heard about it for the Mavic Air.

If anyone has suggestions, it wold be very apreciated.

Thanks!

2018-2-19
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pawel_g
lvl.4
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What software have you tried?
Although my Mac will not open DNG's but Adobe Lightroom and Adobe Camera RAW opens them without any problem.
DNG is standard format independent of DJI so any software that is able to read DNGs should support those from Mavic Air.

br, Pawel.
2018-2-19
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Ste_427
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Hi Pawel, thanks for the answer.

I've tried Quick View, Photo, iPhoto, Raw Power, etc etc
With other DNG files I've never had problems with these apps, the format DNG appears between supperted files in all of them.
So before buying Lightroom or Photoshop I'd like to be sure that the problem does not cam from the Drone.

Stefano
2018-2-19
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pawel_g
lvl.4
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In that case it can be problem with the Drone. As I said - DNG is universal, so If you have software that already reads DNGs it should read those from Mavic Air.
If you could put is in some cloud or so and post a link I can check that of course.

Br, Pawel
2018-2-19
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Ste_427
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I'm trying with Adobe DNG Converter in this moment, and it even can't read those files.
It shows them "in grey" and they are not selectable at all.

Here you can find a photo, let me know if you can see it

http://jmp.sh/809CHB4

Thanks again for your help!
2018-2-19
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Ste_427
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ahah, clicking on the link I can see the photo in Safari

http://jmp.sh/v/vHnaIKjmGawfmhlw3x40
2018-2-19
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pawel_g
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Yep, everything is perfectly ok with this file. Opens on Adobe LR and ACR. In those it renders much better than with Safari.

Br, Pawel.
2018-2-19
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Ste_427
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Believe me, I can't understand
So the file seems to be ok, my Mac can see it with no problem at all if I upload it online, but I can't open or even see a preview with any app, even if I download the same file I've uploaded.
Wow, i'm a bit confused
2018-2-19
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Ste_427
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here's someone other who's having a similar problem.
In his case he can open convert these files with Adobe Converter. I can't do that, so maybe even with Lightroom i should have the samep roblems..

https://mavicpilots.com/threads/ ... files-on-mac.33749/


I downloaded from a link in the thread linked a DNG photo, taken with a Mavic Pro. No problem opening it with my Mac.It's the Drone who probably writes something wrong in my files..

2018-2-19
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Ex Machina
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DJI DNG became incompatible with some versions of Mac OS until the release of High Sierra, maybe this is your problem? See the sordid details at MacOS Sierra 10.12.5 vs. DNG? [WORKAROUND].
2018-2-19
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Ste_427
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Well, i have High Sierra in my Macs, so the problem had to be solved .
But i’m still getting it..
2018-2-19
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Ex Machina
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Ste_427 Posted at 2018-2-19 15:37
Well, i have High Sierra in my Macs, so the problem had to be solved .
But i’m still getting it..

Huh, downloaded the file to my High Sierra desktop and I'm having the same problem with Finder previews and when I try to open it in Preview with error message: Preview currently does not support this raw file format.
2018-2-20
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Ste_427
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Exactly the same message I get in my Macs. I’ve just sent a copule of screenshot (preview and photo) to DJI support, hope they can help
2018-2-20
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Ex Machina
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Loads fine in Lightroom, but LR is known to be more forgiving on DNG formatting. Don't have time to delve into this right now, but fwiw, here's the EXIF data for the file -- I think it's weird that the Compression value is defined as "uncompressed":

lfranc-3s-mc:~ lfrancis$ exiftool /Users/lfrancis/Desktop/killme/DJI_0024.dng
ExifTool Version Number         : 10.07
File Name                       : DJI_0024.dng
Directory                       : /Users/lfrancis/Desktop/killme
File Size                       : 18 MB
File Modification Date/Time     : 2018:02:20 16:51:29-05:00
File Access Date/Time           : 2018:02:20 16:59:58-05:00
File Inode Change Date/Time     : 2018:02:20 16:56:37-05:00
File Permissions                : rw-r--r--
File Type                       : DNG
File Type Extension             : dng
MIME Type                       : image/x-adobe-dng
Exif Byte Order                 : Little-endian (Intel, II)
Make                            : DJI
Camera Model Name               : FC2103
Orientation                     : Horizontal (normal)
Software                        : 10.00.08.14
Modify Date                     : 2018:02:17 11:52:12
Image Width                     : 4056
Image Height                    : 2280
Bits Per Sample                 : 16
Compression                     : Uncompressed
Photometric Interpretation      : Color Filter Array
Strip Offsets                   : 387166
Samples Per Pixel               : 1
Rows Per Strip                  : 2280
Strip Byte Counts               : 18495360
Planar Configuration            : Chunky
CFA Repeat Pattern Dim          : 2 2
CFA Pattern 2                   : 0 1 1 2
CFA Plane Color                 : Red,Green,Blue
CFA Layout                      : Rectangular
Black Level Repeat Dim          : 2 2
Black Level                     : 4080 4080 4080 4080
White Level                     : 65535
Default Scale                   : 1 1
Default Crop Origin             : 4 4
Default Crop Size               : 4048 2272
Bayer Green Split               : 0
Anti Alias Strength             : 1
Best Quality Scale              : 1
Active Area                     : 0 0 2280 4056
Opcode List 3                   : (Binary data 12468 bytes, use -b option to extract)
Default User Crop               : 0 0 1 1
Subfile Type                    : Reduced-resolution image
Preview Image Start             : 44769
Preview Image Length            : 342397
Y Cb Cr Coefficients            : 0.299 0.587 0.114
Y Cb Cr Sub Sampling            : YCbCr4:2:0 (2 2)
Y Cb Cr Positioning             : Co-sited
Reference Black White           : 0 255 128 255 128 255
About                           : DJI Meta Data
Format                          : image/dng
Latitude                        : +45.7717844
Longitude                       : +9.5570116
Absolute Altitude               : +1.20
Relative Altitude               : +73.00
Gimbal Roll Degree              : +0.00
Gimbal Yaw Degree               : +112.90
Gimbal Pitch Degree             : -4.20
Flight Roll Degree              : -0.50
Flight Yaw Degree               : +112.90
Flight Pitch Degree             : +1.10
Cam Reverse                     : 0
Gimbal Reverse                  : 0
Self Data                       : DJI Self data
Version                         : 7.0
Has Settings                    : False
Has Crop                        : False
Already Applied                 : False
Exposure Time                   : 1/406
F Number                        : 2.8
Exposure Program                : Program AE
ISO                             : 100
Exif Version                    : 0230
Date/Time Original              : 2018:02:17 11:52:12
Create Date                     : 2018:02:17 11:52:12
Aperture Value                  : 2.8
Exposure Compensation           : 0
Max Aperture Value              : 2.8
Subject Distance                : undef
Metering Mode                   : Average
Light Source                    : Unknown
Flash                           : No flash function
Focal Length                    : 4.5 mm
Exposure Index                  : undef
File Source                     : Digital Camera
Scene Type                      : Directly photographed
Custom Rendered                 : Normal
Exposure Mode                   : Auto
White Balance                   : Auto
Digital Zoom Ratio              : undef
Scene Capture Type              : Standard
Gain Control                    : None
Contrast                        : Normal
Saturation                      : Normal
Sharpness                       : Normal
Subject Distance Range          : Unknown
Lens Info                       : 0mm f/2.2
GPS Version ID                  : 2.3.0.0
GPS Latitude Ref                : North
GPS Longitude Ref               : East
GPS Altitude Ref                : Above Sea Level
DNG Version                     : 1.4.0.0
DNG Backward Version            : 1.3.0.0
Color Matrix 1                  : 1.6804 -0.9787 -0.2259 -0.3295 1.366 -0.0113 -0.0307 0.159 0.6367
Color Matrix 2                  : 0.6883 -0.1326 -0.0981 -0.4557 1.3643 0.0632 -0.1285 0.2585 0.4512
Analog Balance                  : 1 1 1
As Shot Neutral                 : 0.4406196213 1 0.6666666667
Baseline Exposure               : 0
Baseline Noise                  : 1
Baseline Sharpness              : 1
Linear Response Limit           : 1
Shadow Scale                    : 1
DNG Private Data                : (Binary data 6563 bytes, use -b option to extract)
Calibration Illuminant 1        : Standard Light A
Calibration Illuminant 2        : D65
Profile Name                    : Embedded
Profile Hue Sat Map Dims        : 18 6 1
Profile Hue Sat Map Data 1      : (Binary data 5393 bytes, use -b option to extract)
Profile Hue Sat Map Data 2      : (Binary data 5401 bytes, use -b option to extract)
Profile Embed Policy            : Allow Copying
Noise Profile                   : 0.0001059 1.631e-06
Original Default Final Size     : 0 0
Original Best Quality Size      : 0 0
Original Default Crop Size      : 0 0
Aperture                        : 2.8
CFA Pattern                     : [Red,Green][Green,Blue]
GPS Altitude                    : 73 m Above Sea Level
GPS Latitude                    : 45 deg 46' 18.00" N
GPS Longitude                   : 9 deg 33' 25.00" E
GPS Position                    : 45 deg 46' 18.00" N, 9 deg 33' 25.00" E
Image Size                      : 4056x2280
Megapixels                      : 9.2
Preview Image                   : (Binary data 342397 bytes, use -b option to extract)
Shutter Speed                   : 1/406
Focal Length                    : 4.5 mm
Light Value                     : 11.6
2018-2-20
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Ste_427
Second Officer
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Wow, thanks!! I’ll link this thread to DJI Support!
2018-2-20
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NFG
lvl.2
Australia
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For what it's worth, that file opens fine in Capture One Pro (on Windows, but I don't think it matters).



I hope it's OK I gave your image a bit of editing.  You have some nice scenery in your area, I hope I didn't ruin it too much with my edits.  I'm not a landscape guy.  ^_^
2018-2-20
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Ste_427
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NFG Posted at 2018-2-20 14:52
For what it's worth, that file opens fine in Capture One Pro (on Windows, but I don't think it matters).

[view_image]

Thanks!
i have no Windows PC to try, but I like your edits very much
2018-2-21
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Ex Machina
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Ste_427 Posted at 2018-2-19 10:35
Believe me, I can't understand  
So the file seems to be ok, my Mac can see it with no problem at all if I upload it online, but I can't open or even see a preview with any app, even if I download the same file I've uploaded.
Wow, i'm a bit confused

Probably Safari is showing the embedded jpeg preview.
2018-2-21
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Ex Machina
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Ex Machina Posted at 2018-2-20 14:04
Loads fine in Lightroom, but LR is known to be more forgiving on DNG formatting. Don't have time to delve into this right now, but fwiw, here's the EXIF data for the file -- I think it's weird that the Compression value is defined as "uncompressed":

lfranc-3s-mc:~ lfrancis$ exiftool /Users/lfrancis/Desktop/killme/DJI_0024.dng

Welp, EXIF data on my DNG also shows as uncompressed, which I guess makes sense now that I think about it -- they are RAW files, after all.
2018-2-21
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Ste_427
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Unserstood!

I’m still waiting for DJI to answer, i’ll let you know!
2018-2-21
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Ex Machina
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Ste_427 Posted at 2018-2-21 23:05
Unserstood!

I’m still waiting for DJI to answer, i’ll let you know!

Hear anything yet? Maybe it's as simple as the new Mavic Air camera just needs to be recognized and supported in Apple's RAW Camera support?
2018-3-7
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Ste_427
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No, still no news from Dji in this matter.
Honestly I'm waiting for next  firmware update, then if does not work I'll contact Dji again.
It's not urgent for me, since it's not my dayjob, but you know... when you think you've got a beautiful photo and you can't open it to full resolution it's a bit frustrating
2018-3-7
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Ste_427
Second Officer
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Just a little update.

I downloaded Photoshop. With Ps I can actually open and modify DNG / RAW files from my Mavic Air. No issues.
So... I still can't get it. If it's my Drone problem, or my Mac's probem (oh come on, I bought the MacBook Pro one month ago!), anyway I found a way to see those photos..
2018-3-9
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DavidUrbanCZ
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Ste_427 Posted at 2018-3-9 06:39
Just a little update.

I downloaded Photoshop. With Ps I can actually open and modify DNG / RAW files from my Mavic Air. No issues.

I have contacted DJI support without any results. They flatly refused to support Apple/Mac.

Apple Support was more helpful, they hinted on this article https://support.apple.com/en-us/HT207972 stating they do not support RAW DNG files from DJI. BUT, they also agreed to raise engineering issue and follow-up on the problem. Maybe because I argued that they sell DJI on Apple Store, so they should support it . I will post more info this week.

I can confirm the problem is Mac/iOS related, Photoshop, Lightroom and other professional apps on both iPad and Mac interpret the files normally.
2018-3-12
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Ste_427
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DavidUrbanCZ Posted at 2018-3-12 04:20
I have contacted DJI support without any results. They flatly refused to support Apple/Mac.

Apple Support was more helpful, they hinted on this article https://support.apple.com/en-us/HT207972 stating they do not support RAW DNG files from DJI. BUT, they also agreed to raise engineering issue and follow-up on the problem. Maybe because I argued that they sell DJI on Apple Store, so they should support it . I will post more info this week.

Thanks a lot for your update!
2018-3-12
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DoctaDJones
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I think I have the solution to this problem. The DNG files that don't work with OSX are missing the UniqueCameraModel EXIF tag. Without that tag Apple applications and OSX will view the DNG files as unsupported. Whether that is Apple being overly picky or if that is DJI not complying with the proper DNG specs, I'm not sure. But the good news is it is easily fixed using ExifTool and the following command (You can download ExifTool here: https://www.sno.phy.queensu.ca/~phil/exiftool/):

exiftool -tagsfromfile @ '-UniqueCameraModel<Model' -if '$format eq "image/dng"' -if 'not $UniqueCameraModel' -r ~/Desktop/DroneBrokenDNGs

Replace the ~/Desktop/DroneBrokenDNGs with the path to the folder containing your DNG files or just one specific DNG file. That folder can contain other files as well, this command should only edit DNG files that are missing that UniqueCameraModel tag.

What the command does:
-tagsfromfile @ '-UniqueCameraModel<Model' = This copies the Model tag (which does exist in the DNG file) to the UniqueCameraModel tag.
-if '$format eq "image/dng"' = This tells ExifTool to only edit files that are of the DNG format
-if 'not $UniqueCameraModel' = This tells ExifTool to only edit files that are missing the UniqueCameraModel tag.
-r ~/Desktop/DroneBrokenDNGs = This tells ExifTool to scan the specified directory and all subdirectories (the -r option).
Note: This command will make a backup copy of the DNG files before editing them. This is safer but you can disable the backup by adding an -overwrite_original option to the command. You should only use that option if you have backups of the DNG files you are editing.



Hopefully in a future firmware DJI will add back in the UniqueCameraModel tag when it writes the DNG file. There is also some EXIF tags related to the lens that are missing, although those are not critical to read the DNGs it would be good to have them in there.

Let me know if you have any luck with this solution, hopefully it's universal enough to work for others. Now if I can just get DJI to add GPS tags to the MOV files....but that is for another thread.


2018-3-12
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Cameleon
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DoctaDJones Posted at 2018-3-12 05:34
I think I have the solution to this problem. The DNG files that don't work with OSX are missing the UniqueCameraModel EXIF tag. Without that tag Apple applications and OSX will view the DNG files as unsupported. Whether that is Apple being overly picky or if that is DJI not complying with the proper DNG specs, I'm not sure. But the good news is it is easily fixed using ExifTool and the following command (You can download ExifTool here: https://www.sno.phy.queensu.ca/~phil/exiftool/):

exiftool -tagsfromfile @ '-UniqueCameraModel

Good find! Have you forwarded that the specific EXIF tag is missing to DJI support?

They can take a look here for the details of what should be in the tag - http://www.exiv2.org/tags.html

Exif.Image.UniqueCameraModel        Defines a unique, non-localized name for the camera model that created the image in the raw file. This name should include the manufacturer's name to avoid conflicts, and should not be localized, even if the camera name itself is localized for different markets (see LocalizedCameraModel). This string may be used by reader software to index into per-model preferences and replacement profiles.

Exif.Image.LocalizedCameraModel        Similar to the UniqueCameraModel field, except the name can be localized for different markets to match the localization of the camera name.

2018-3-12
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Ste_427
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DoctaDJones Posted at 2018-3-12 05:34
I think I have the solution to this problem. The DNG files that don't work with OSX are missing the UniqueCameraModel EXIF tag. Without that tag Apple applications and OSX will view the DNG files as unsupported. Whether that is Apple being overly picky or if that is DJI not complying with the proper DNG specs, I'm not sure. But the good news is it is easily fixed using ExifTool and the following command (You can download ExifTool here: https://www.sno.phy.queensu.ca/~phil/exiftool/):

exiftool -tagsfromfile @ '-UniqueCameraModel

I'll try as soon as I can and let you know, thanks!
2018-3-13
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Cameleon
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I hadn't noticed this, but yes it impacts me too. I hadn't tried to use Preview or Photos app to preview the DNG just yet, only opening them in Luminar - which of course reads them fine.

I've opened a support case with reference to this thread so hopefully DJI dev can add this tag for us in the next firmware.
2018-3-15
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theonedr1
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DoctaDJones Posted at 2018-3-12 05:34
I think I have the solution to this problem. The DNG files that don't work with OSX are missing the UniqueCameraModel EXIF tag. Without that tag Apple applications and OSX will view the DNG files as unsupported. Whether that is Apple being overly picky or if that is DJI not complying with the proper DNG specs, I'm not sure. But the good news is it is easily fixed using ExifTool and the following command (You can download ExifTool here: https://www.sno.phy.queensu.ca/~phil/exiftool/):

exiftool -tagsfromfile @ '-UniqueCameraModel

Thanks so much for this! I was going crazy thinking on what was I doing wrong. Photos now recognize the dng files from my Mavic Air. I hope DJI fixes this with a software update soon.
2018-3-16
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Cameleon
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theonedr1 Posted at 2018-3-16 13:32
Thanks so much for this! I was going crazy thinking on what was I doing wrong. Photos now recognize the dng files from my Mavic Air. I hope DJI fixes this with a software update soon.

Make sure you open a support case so that DJI see it is an issue that needs to be fixed in firmware
2018-3-16
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DavidCZ
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On my device the problem was resolved with new drone software I downloaded few days back.
2018-5-3
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