by ʇolɐǝz ǝɥʇ qoq

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No. You can't do that. Where would it come from? In any case, the JPEG thumbnail is just a very small tiny version, usually 160×120. That's so small as to be basically useless, so it's often discarded so as to not waste that space and/or bandwidth. Once it's discarded, you could create a new one from the full-sized image, but you can't in any way create one ...


Unless you have need of the PreviewImage, it probably isn't worth worrying about. Minor errors aren't necessarily a sign of image damage. It could be that the camera isn't writing the image metadata exactly according to the specifications or that ExifTool doesn't deal with the peculiarities of that specific camera. Given the huge range of cameras out ...

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