Opening DNG file crashes blender #33003

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Markus Kasten · 2012-10-28T21:05:29+01:00

Markus Kasten commented

2012-10-28 21:05:29 +01:00

%%%Opening DNG RAW files (in my case from a Black Magic Cinema Camera) in Movie Clip editor crashes blender. Here's a Mac crash report, seems like the TIFF loader is trying to open the DNG: http://www.pasteall.org/36677

To test, DNG-RAWs are available at http://nofilmschool.com/2012/08/blackmagic-john-brawley-release-raw-cinema-camera-files-for-download/ (those archives are quite big, I don't know whether I'd be allowed to upload single files. I was using this footage too).%%%

%%%Opening DNG RAW files (in my case from a Black Magic Cinema Camera) in Movie Clip editor crashes blender. Here's a Mac crash report, seems like the TIFF loader is trying to open the DNG: http://www.pasteall.org/36677 To test, DNG-RAWs are available at http://nofilmschool.com/2012/08/blackmagic-john-brawley-release-raw-cinema-camera-files-for-download/ (those archives are quite big, I don't know whether I'd be allowed to upload single files. I was using this footage too).%%%

Markus Kasten commented

2012-10-28 21:05:29 +01:00

Changed status to: 'Open'

Campbell Barton commented

2012-10-29 05:10:06 +01:00

%%%Tested on linux with libtiff 4.0.3 and the image does not load, but It never crashes (tested with Valgrind and it reports no warnings).

TIFFReadDirectory: Warning, Unknown field with tag 33421 (0x828d) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 33422 (0x828e) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 37398 (0x9216) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 51043 (0xc763) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 51044 (0xc764) encountered.

This is the output I get, looking into this:
http://en.wikipedia.org/wiki/Digital_Negative

DNG files use TIFF container to store data so blender isnt wrong in detecting this as a tiff, (however you would want propper DNG support of course, but thats a feature we dont support).

So possibly this is a bug in libtiff 3.9.2? (looking in lib it looks like OSX is on this version).

Assigning toi Jens.%%%

%%%Tested on linux with libtiff 4.0.3 and the image does not load, but It never crashes (tested with Valgrind and it reports no warnings). --- TIFFReadDirectory: Warning, Unknown field with tag 33421 (0x828d) encountered. TIFFReadDirectory: Warning, Unknown field with tag 33422 (0x828e) encountered. TIFFReadDirectory: Warning, Unknown field with tag 37398 (0x9216) encountered. TIFFReadDirectory: Warning, Unknown field with tag 51043 (0xc763) encountered. TIFFReadDirectory: Warning, Unknown field with tag 51044 (0xc764) encountered. --- This is the output I get, looking into this: http://en.wikipedia.org/wiki/Digital_Negative DNG files use TIFF container to store data so blender isnt wrong in detecting this as a tiff, (however you would want propper DNG support of course, but thats a feature we dont support). So possibly this is a bug in libtiff 3.9.2? (looking in lib it looks like OSX is on this version). Assigning toi Jens.%%%

Campbell Barton commented

2012-10-29 05:17:44 +01:00

%%%note, running "file" on these files gives:
Frame000340.dng: TIFF image data, big-endian

from an image in Shot_3.zip %%%

%%%note, running "file" on these files gives: Frame000340.dng: TIFF image data, big-endian from an image in Shot_3.zip %%%

jens verwiebe commented

2012-10-29 22:33:02 +01:00

%%%I testwise rebuild tiff in version 4.0.3 and it not only fixes the bug, but also works fine with .dng !!!
Must now renew libtiff and all dependent libs as oiio etc. , will take a while.

Jens%%%

%%%I testwise rebuild tiff in version 4.0.3 and it not only fixes the bug, but also works fine with .dng !!! Must now renew libtiff and all dependent libs as oiio etc. , will take a while. Jens%%%

jens verwiebe commented

2012-10-29 23:29:51 +01:00

%%%I pushed now libtiff 4.0.3 darwin9 i386 x_86_64 and renewed oiio and ols with the new tiff.
Pls test, i attached a dng file

Jens%%%

%%%I pushed now libtiff 4.0.3 darwin9 i386 x_86_64 and renewed oiio and ols with the new tiff. Pls test, i attached a dng file Jens%%%

jens verwiebe commented

2012-10-29 23:30:54 +01:00

Changed status from 'Open' to: 'Resolved'

jens verwiebe closed this issue

2012-10-29 23:30:54 +01:00

Chris commented

2016-12-20 10:49:55 +01:00

Added subscriber: @gree

Chris commented

2016-12-20 10:49:56 +01:00

@ Jens verwiebe; would you mind describing the solution a little bit more in detail?
I'm trying to get DNG support within Blender VSE; but either blender shows a blank frame or crashes.

System:
Debian 8 / Bunsenlabs
Blender 2.76 / 2.77 / 2.78

libraw10 (0.16.0-9+deb8u2)
libkdcraw-data (4:4.14.0-1)
libkdcraw23 (4:4.14.0-1)
openimageio-tools (1.4.14~dfsg0-1) // this is the default debian version
I've also tried compiling custom blender + oiio incl. libRAW.

I'm still missing OLS, not sure what's it about.

DNG's do work with 'vi' via command line.

Further discussion: oiio github
bender stackexchange

@ Jens verwiebe; would you mind describing the solution a little bit more in detail? I'm trying to get DNG support within Blender VSE; but either blender shows a blank frame or crashes. System: Debian 8 / Bunsenlabs Blender 2.76 / 2.77 / 2.78 libraw10 (0.16.0-9+deb8u2) libkdcraw-data (4:4.14.0-1) libkdcraw23 (4:4.14.0-1) openimageio-tools (1.4.14~dfsg0-1) // this is the default debian version I've also tried compiling custom blender + oiio incl. libRAW. I'm still missing OLS, not sure what's it about. DNG's do work with 'vi' via command line. Further discussion: [oiio github ](https://github.com/OpenImageIO/oiio/issues/1584) [bender stackexchange ](http://blender.stackexchange.com/questions/57208/how-to-develop-a-vse-file-format-importer-for-dng-cr2-image-files)

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Opening DNG file crashes blender #33003