Hi,
I am trying to add multiple preview/thumbnail images to a JPEG file. I have already tried to add a thumbnail which worked fine. But then adding a previewimage failed. Trying to add another thumbnailimageis just replacing the previous or throws errors.
exiftool.exe "-thumbnailimage<=thumb72px.jpg" image2000px.jpg (works)
exiftool.exe "-previewimage <=thumb288px.jpg" image2000px.jpg (does nothing)
exiftool.exe "-thumbnailimage<=thumb288px.jpg" image2000px.jpg (replaces thumb72px)
exiftool.exe "-thumbnailimage+<=thumb288px.jpg" image2000px.jpg (Warning: Shift value for Olympus:ThumbnailImage is not a number)
Is it possible to add rather than replace thumbnails?
Thanks in advance
The preview image is not part of the EXIF standard, so ExifTool can not be used to create this tag. It will only write PreviewImage if it already exists in a file (in the proprietary maker notes).
The EXIF standard specifies only a single thumbnail image. So if you try to write another one, the first will be replaced.
- Phil