exiftool -ThumbnailImage produces a 0 length file ***my mistake****

[geneluck]

Hi,
I am planning to extract all the jpeg thumbnails from my NEF files  (D700, D800, Df, most recent is D5500)
I installed the most recent windows  exe file from http://www.exiftool.org/

I  then tried the following command to extract the thumbnail from a NEF file (NEF file from D5500 which should be supported from V2.7)
exiftool -ThumbnailImage G:\photos\2016\20161027\DSC_0002.NEF > G:\photos\image.jpg produces a 0 length file

Tested with a raw file from my DF camera, same result



Sorry : my mistake : use JpgFromRaw instead

[Alan Clifford]

In my D7000 nefs, there is no "thumbnailimage". I have

JpgFromRaw
PreviewImage
ThumbnailTIFF

You also need -b, for example


exiftool -b -previewimage ahc_8047.nef > temp.jpg

[Alan Clifford]

JpgFromRaw is not thumbnail size.  Try previewimage.

[geneluck]

Thank you so much!!! I realized that it was not a Thumbnail  from the size (1.5Meg) but did not see another option in the examples.
Reagrds

[Phil Harvey]

You can see what is available with this command:

exiftool -preview:all FILE

- Phil