Phil Harvey

This doesn't make sense to me. In my sample the empty areas are scattered throughout the maker notes, so just changing the size wouldn't work. Could you attach both images...

Ooops. **This appears to be a rather serious Exiv2 bug.** Apparently the original MakerNotes have been written to the file, but the size has been changed to that of the...

Sorry, I don't know of anything that can do this. ExifTool rewrites the MakerNotes and compresses the maker notes to 9270 bytes (the same size the Exiv2 writes), except that...

One more thing: The file you posted does contain the PreviewImage trailer., and the PreviewImageStart 0x0101 tag is valid and correct, although it does point outside the EXIF data. Yes....

This means that there is no problem with the PreviewImage in your original JPG. It is more-or-less standard practice for the MakerNotes to reference a large PreviewImage outside the EXIF...

Thanks! I'll add 19, 20, 21 and 22. The "AF Point Expansion (4 point)" means 4 points are added around the central point, for a total of 5, which I...

Here are my thoughts on mandatory tags: https://exiftool.org/writing.html#Mandatory ExifTool attempts to adhere to the relevant specifications when writing, which unfortunately requires writing mandatory tags in EXIF. - Phil

This is given by the FileSize.

Thanks for the sample. I'll look into this when I get a chance. - Phil

This is an interesting _theoretical_ suggestion, but I would rather not make changes like this unless there is a _real_ demand because it may break things for users already relying...