#40 DNG Raw Support


Hi, first of all, I love JpegView, thanks so much for making it !
One thing that I'm really missing though is the ability to view DNG raw files. Is there any chance that this will be added in the near future ?
Not sure if this helps, but here is the link to the DNG codec: http://labs.adobe.com/wiki/index.php/DNG_Codec


  • ubuluga

    ubuluga - 2012-09-26
    • assigned_to: nobody --> dkleiner
  • David Kleiner

    David Kleiner - 2012-09-28

    JPEGView already can show the embedded JPEGs in DNG files.
    It's not planned to add more support for RAW images - this would need 16 bit image processing. To preview the content of RAW images like DNG, the embedded JPEG is fine and way faster than decoding the DNG.

  • ubuluga

    ubuluga - 2012-09-30

    I didn't know JPEGView could preview the embedded JEPG of a DNG. Previously I was able to open cr2 files in JPEGView, but DNG files would always give me an error message. I now figured out that this was because when I converted my cr2 files to DNG files in Lightroom, I embedded only a medium size JPEG Preview. For some reason JPEGView isn't able to open these. When I embed a full size JEPG Preview it works flawlessly. This is exactly what I actually wanted, no additional Raw decoding necessary.
    One thing though that would be great if it would be added / fixed in the future: JPEGView doesn't show the EXIF data for cr2 or DNG Files (The only raw formats I could test so far), it only shows the pixel dimensions. JPEGS developed from the same Raw files do show the entire EXIF data. Is there anyway I can make JPEGView display the Raw file's EXIF data ?

  • ubuluga

    ubuluga - 2012-10-15

    Also, when viewing JPEGs embedded in raw files the images are not automagically rotated the right way around like normal JPEGs are. Is there any chance to implement this ?

  • David Kleiner

    David Kleiner - 2013-01-20

    Actually the same EXIF decoder is used for embedded JPEGs as for normal JPEGs thus showing EXIF and auto-rotate should work if this is in the embedded JPEG.
    However I think that the embedded JPEG does not contain any EXIF metadata that's why it does not work. Decoding the (non EXIF) metadata of the camera RAWs is out of scope for JPEGView as there are too many different formats.

  • David Kleiner

    David Kleiner - 2013-03-15
    • status: open --> closed
    • milestone: --> Next_Release_(example)

Log in to post a comment.

Get latest updates about Open Source Projects, Conferences and News.

Sign up for the SourceForge newsletter:

JavaScript is required for this form.

No, thanks