How to generate thumbnail for a picutre with cli

[ytzhiyuan]

I need to generate thumbnail for a picture.It is best to define the thumbnail size.

[StarGeek]

Exiftool cannot modify the actual image data, only the metadata of a file.  You'll want to look at something like ImageMagick to create thumbnails from the command line.  After the thumbnail has been created, then exiftool can embed that thumbnail.  See this example command.

[ytzhiyuan]

Exiftool cannot modify the actual image data, only the metadata of a file.  You'll want to look at something like ImageMagick to create thumbnails from the command line.  After the thumbnail has been created, then exiftool can embed that thumbnail.  See this example command.

ok,thanks