Tips for Writing the Preview Image

[anddrrw]

Hi,
When writing the preview into a jpg image with the following command:

exiftool "-PreviewImage<=preview.jpg" image.jpg

It doesn't seem to work very reliably. It works for images from some camera models, for others it'll give me:

Code Select Expand

0 image files updated
1 image files unchanged

with no other info.

I've read this page and it gives some helpful guidance, but before I dig my way into the specific bytes of the jpg format myself, I just want to be sure there's not something else I'm missing in the exiftool doc (like some kind of force-write), a workflow that might work, or any other simple solutions.

Thanks!

[Phil Harvey]

ExifTool will update some existing preview images but won't add new ones.  The whole preview image situation is a real mess, and there are very many ways that they are stored in JPEG images.  Personally I would recommend avoiding the whole situation.

- Phil

[anddrrw]

Haha, good suggestion Phil. Thanks.