Hello,
I am a newbie to ExifTool.
Basically, I am trying to extract a preview and thumbnail from a DNG file.
1)
exiftool -b -PreviewImage IMG_4147.dng > IMG4147prev.jpg
works successfully and generates a beautiful preview image.
2) However,
exiftool -b -ThumbnailImage IMG_4147.dng > IMG4147thumb.jpg
generates a 0 "zero" sized IMG4147thumb.jpg file.
Any idea why the -ThumbnailImage tag generates a zero sized file?
I have tried this for various DNG files, I always get a preview image, but thumbnail image is always zero.
Your help is appreciated.
Thanks,
SulG
Hi SulG,
Sorry for the delay in responding. I was on vacation.
The problem is that the DNG file doesn't contain a JPEG-format ThumbnailImage. Use exiftool FILE to see all of the metadata that ExifTool can extract.
- Phil