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Bossa-Nova-Musician
Bossa-Nova-Musician
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Lossy DNG and Apple Finder

Jun 18, 2012 8:11 AM

I'd like to convert my RAW files to DNG lossy files but the Finder is not showing the thumbnails of the converted files nor is Preview opening them.

 

With lossless DNG converted files I have no problems. I'm using Mac OS 10.6.8.

 

Any solution to this?

 

Thanks.

1437 Views   13 Replies   Latest reply: sandy_mc, Jun 20, 2012 10:18 AM
 
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  • Mark Alan Thomas
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    1. Mark Alan Thomas,
    Jun 18, 2012 10:04 AM   in reply to Bossa-Nova-Musician
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    Apple will need to update its DNG support. It's already a bit beind the curve, so don't hold your breath.

     
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  • Bossa-Nova-Musician
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    2. Bossa-Nova-Musician,
    Jun 19, 2012 11:37 PM   in reply to Mark Alan Thomas
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    I read elsewhere that this new lossy DNG is not openly documented, kind of a own Adobe's proprietary JPEG, and that is the reason why it is not being supported by Apple.

     
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  • johnbeardy
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    3. johnbeardy,
    Jun 19, 2012 11:48 PM   in reply to Bossa-Nova-Musician
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    That was probably written by some anti-DNG troll. Each of those three points seems wrong.

     
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  • johnbeardy
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    4. johnbeardy,
    Jun 19, 2012 11:55 PM   in reply to Bossa-Nova-Musician
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    "I'd like to convert my RAW files to DNG lossy files"

     

    Why? I take the line that if a picture is worth keeping, it's worth keeping 100%, so the only pictures I save as lossy DNG are the few JPEGs I ever shoot.

     
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  • Geoff the kiwi
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    5. Geoff the kiwi,
    Jun 20, 2012 1:23 AM   in reply to johnbeardy
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    Or are you really wanting "Fast Load"? This has advantages.

     
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  • johnbeardy
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    6. johnbeardy,
    Jun 20, 2012 12:21 AM   in reply to Geoff the kiwi
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    Fast load makes sense - though loading is so quick I can't see the difference.

     
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  • Bossa-Nova-Musician
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    7. Bossa-Nova-Musician,
    Jun 20, 2012 6:54 AM   in reply to Geoff the kiwi
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    Yes, it's because of fast loading (I work on a MacBook Pro with 4GB of RAM). But if the lossy DNGs can be viewed in Lightroom only, and not in other applications, like the Finder, it restrains myself from converting them right now.

     
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  • Geoff the kiwi
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    8. Geoff the kiwi,
    Jun 20, 2012 7:03 AM   in reply to Bossa-Nova-Musician
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    I use DNG with fastload now but not lossycompressed.

    Thumbnails can be viewed and files opened with Preview.

    MBP 10.7.4 - I guess it's a limitation of your OS.

     
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  • Bossa-Nova-Musician
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    9. Bossa-Nova-Musician,
    Jun 20, 2012 7:07 AM   in reply to Geoff the kiwi
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    I have 10.6.8.

     

    Please convert a copy of one of your RAW files to DNG *lossy* and see if the Finder shows its thumbnail and Preview can open it. Thanks a lot!

     
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  • Geoff the kiwi
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    10. Geoff the kiwi,
    Jun 20, 2012 7:15 AM   in reply to Bossa-Nova-Musician
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    With lossy compression I can see the thumbnail but Preview does not support the file. Apple issue!!

     
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  • Mark Alan Thomas
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    11. Mark Alan Thomas,
    Jun 20, 2012 7:22 AM   in reply to Geoff the kiwi
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    It is an Apple issue. Once Adobe documents the new format, Apple will have the option to support it. However, Apple's support for DNG has always been incomplete. Linear DNG is still not supported, which matters if you use a camera with a non-stanard sensor, e.g. Foveon.

     
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  • MadManChan2000
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    12. MadManChan2000,
    Jun 20, 2012 10:03 AM   in reply to Mark Alan Thomas
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    It turns out that no documentation is required from Adobe.  The DNGs simply contain an extra optional preview tag that ought to be ignored by other software, but unfortunately this is confusing the software into misreading the files.  This is due to a current limitation in the dcraw source code that many other raw processing software is based on.  I hope a new version of dcraw will soon be posted.

     
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  • sandy_mc
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    13. sandy_mc,
    Jun 20, 2012 10:18 AM   in reply to MadManChan2000
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    Eric,

     

    Ummm, sorry, but call me dumb if want, you guys HAVE to to document this. My apps - dcpTool, CornerFix, etc sure aren't based on DCRaw (the source code is available on SourceForge for those interested). Unless you guys document what you've done, and update the SDK, they're not going to be updated.

     

    Sandy

     
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