I have several hundred jpeg-scans of negatives. For some of these, I stored a textual description of the picture in the Caption-field of the IPTC metadata. (Whether it was a clever idea to store it there or elsewhere is a different question). I need a way to programmatically get out the text from all scans.
I.e. what I need is a tool which dumps the IPTC of all negatives programmatically. I can access the IPTC info in Irfanview by clicking buttons, but this is not practicable for more than a handful of scans. It needs to be programmatically in batch, ideally on the command line / bash shell, ideally with ASCII ouput.
Is this possible, and how?