F-Spot opens wrong JPG thumbnail for NEF files

[Miguel Martinez]

This bug is 100% reproducible.

- Expected behaviour

Using F-Spot to open a NEF file, the correct 10 MPixels picture taken with a Nikon D60 is shown.

- Observed behaviour

If the NEF file has been edited with TransferNX, a small 320x214 thumbnail is shown

[More details]

NEF files are raw data files created by Nikon dSLR cameras, and other than the image data (sensor, white balance, colour profile,...) there is also an embedded jpg that acts as a preview. This jpg is full resolution and has a quality of about 85~90. Being processed exactly as specified by the camera settings, this jpg is used by several programs to display NEF files. Opening a NEF file in Ubuntu defaults to F-Spot, and works OK in Jaunty and Intrepid.

Once a NEF file (Nikon RAW file) has been "developed" with any Nikon software, the thumbnail is updated with a high quality jpg to reflect the changes made (white balance, exposure, lateral chromatic aberration,...). F-Spot opens successfully NEF files edited with CaptureNX 2 (the $180 retouching package sold by Nikon). However, if a file is edited with the freeware TransferNX, F-Spot no longer displays the correct thumbnail. On the other hand, a 320x214 thumbnail is shown. Furthermore, the colours are all off, although GQview is able to display the colours OK. It must be noted that the full thumbnail is still there, since dcraw is still able to extract the full resolution jpg.

I have tested this only with NEF files created with a Nikon D60 and with TransferNX 1.3 and 1.4 running on Windows (there is a Mac OS X version). I can provide two sample NEF files (original and edited), but one file is about 10 Mb.

[Pedro Villavicencio (pedro)]

could you attach an example to the report?

[Miguel Martinez (el-quark)]

OK, I'm attaching a NEF edited with ViewNX. Let's see if launchpad allows uploading a 10Mb file. Please excuse my photographic abilities. Note again that the correct image can be extracted with the command

dcraw -e DSC_5013.NEF

[Launchpad Janitor (janitor)]

[Expired for f-spot (Ubuntu) because there has been no activity for 60 days.]