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Auto-rotate support for DNG files?

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    Auto-rotate support for DNG files?

    Hi,
    I'm new to this forum, but been an IrfanView user for years. It is really a great application, so thanks a lot!

    I am also a new user of DNG format (direct from my Pentax K10D camera) and I've been trying to figure out if there is a setting to get auto-rotate to be supported when viewing images. There is support in Thumbnail view, so I dont get why it's not supported when opening the images.

    I tried to find an old question for this but could not find any. So sorry if this is a copy of an old thread.

    BR
    Stefan

    #2
    Hi ssahlander,

    Maybe this can help?

    I don't have DNG files, so I can't try.

    Laurent
    Before you post ... fill in your OS and IV version in your profile.

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      #3
      I'm quite curious about this DNG format. Anybody can deliver an example of it ?
      0.6180339887
      Rest In Peace, Sam!

      Comment


        #4
        Originally posted by Sam_Zen View Post
        I'm quite curious about this DNG format. Anybody can deliver an example of it ?
        A DNG is a TIFF with some additional Tags. So no reason not to use an orientation tag in the DNG.

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          #5
          I could sent you one, but an example of 1024 × 768 is 4 Mb. It's not a kind of Tif file, because a Dng file is compressed (without any loss of information). The max upload is 2 Mb and I haven't got any smaller ones by now

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            #6
            Originally posted by Sjef View Post
            I could sent you one, but an example of 1024 × 768 is 4 Mb. It's not a kind of Tif file, because a Dng file is compressed (without any loss of information). The max upload is 2 Mb and I haven't got any smaller ones by now
            I do not know your source of information but the Adobe DNG specification (dng_spec.pdf) will tell you:

            DNG is an extension of the TIFF 6.0 format, and is compatible with the TIFF-EP standard. It
            is possible (but not required) for a DNG file to simultaneously comply with both the Digital
            Negative specification and the TIFF-EP standard.

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              #7
              Thanks. Got enough tech info to get the picture, so no need for an example file.
              0.6180339887
              Rest In Peace, Sam!

              Comment


                #8
                Originally posted by midora View Post
                DNG is an extension of the TIFF 6.0 format, and is compatible with the TIFF-EP standard.
                Yes, Dng is compatible with Tif6. What I ment was the way Tif is being internaly compressed. See the options in IV when saving to Tif. A Tif file can be compressed externaly. A Dng file too, but without any compressing result.

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