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Tafflad
Inspiring
January 31, 2024
Question

DNG thumbnails not showing in W10 folders

  • January 31, 2024
  • 1 reply
  • 5157 views
Not specifically LR, but as my DNG photo are all for LR, there may be someone here who knows how to resolve the problem.
Windows 10 and LR Lightroom version: 6.14 [ 1149743 ] 

If I go to a Windows 10 folder - all of the jpeg files with have a thumbnail  (as do png, tiff etc)
Very few DNG files will have a thumbnail (usually none)

I have installed Microsoft raw image Extension .... v3 no difference
Have followed the steps to kill thumbnail cache, delete it, and restart explorer ... all jpeg thumbnails rebuild (slowly) but not DNG.
Have also followed the tip to uncheck 'always shows icons, never thumbnails'The advice is to click on teh top button 'apply to folders'  but I can't do that as that is greyed out.  (pic attached)
 
 
 
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    1 reply

    johnrellis
    johnrellis
    Legend
    January 31, 2024

    Which app or exact camera model produced the DNGs?  If LR created the DNGs, which command (Convert Photo To DNG, Enhance, Photo Merge)?

    T
    TaffladAuthor
    Inspiring
    February 1, 2024

    My phone creates DNG files directly  ..  my camera has to have the raw files converted and I use ADOBE DNG converter to do that.

    Just did a test and showed something I had not realised before.

    File saved to Desktop ..... and it has the correct thumbnail.

    When I move file to a sub-folder  of My_Pictures  is arrives there without a thumbnail.

     

    LR identifies the RAW file whether on desktop or in a my_pictures folder

    Noticed another anomaly .... on my phone the selection is simply to output 'RAW' files.

    They arrive on PC as filename.DNG

    I just opened file with Mediainfo and it reports it as an invalid tiff ?  (see attached)

     

    T
    TaffladAuthor
    Inspiring
    February 1, 2024

    I deleted thumbnail cache, increased cache size to 4MB and rebuilt cache.

    Still the same, initially all files in example folder were not thumbnails..... in aprox 30 sec jpeg thumbnails arrived and 2 of the DNG went solid colour - sometimes they then change to proper thumbnails ..... as you can see other DNG still without thumbnail.


    As another test took a pic with camera ... it saves in RW2 format (Lumix)
    Media info advises little:
    General
    Complete name : C:\Users\Rick\Desktop\P1001487.RW2
    File size : 23.1 MiB


    I use the Adobe RAW file converter and it turns it into a DNG file.
    Media Info advises:

    General
    Complete name : C:\Users\Rick\Desktop\0102P1001487.dng
    Format : TIFF
    File size : 18.7 MiB
    Writing application : Panasonic Adobe DNG Converter 11.3 (Windows)
    Writing library : DC-GX9
    FileExtension_Invalid : tiff tif

    Image
    Format : Raw
    Format settings : Little
    Width : 256 pixels
    Height : 192 pixels
    Color space : RGB
    Bit depth : 8 bits
    Compression mode : Lossless

    Encoded date : 2024:02:01 14:14:23

     

    So here is the anomaly .... an original DNG file is tagged as FileExtension_Invalid: tiff tif
    A converted RW2 file to DNG is also tagged as FileExtension_Invalid: tiff tif

    The converted file on desktop had no thumbnail, but when I double clicked to view, it then created a Thumbnail.
    However when I move it to a sub folder of 'My_Pictures' it once again has no Thumbnail.

     

    THis is teh file in case you want to view it

    https://www.dropbox.com/s/jpgp44kocbwb4ck/0102P1001487.dng?dl=0

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