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An Applescript or a small mac application for renaming .jpg files of a selected folder OR selected files within a folder using EXIF data in the following way:
Using an example, if the EXIF "Date Time Original" field is 2012:04:21 02:54:23 for file DSC_0015.JPG then rename to 025423_DSC_0015.JPG.
So for a folder or selected files within a folder the the hours, minutes and seconds component of the "Date Time Original" EXIF field needs to be extracted, the colon needs to be removed and then append "_" + original name to rename each file.
If someone proposes a mac application for this task then the EXIF field for the "Date Time Original" data must be a preference. In other words, if "Date Time Original" is not the name of the meta field containing required date then I must be able to select another field.