

#Ubuntu exiftool mp4
-ext jpg -ext mp4 means only rename files with the “jpg” or “mp4” extension.%%le means keep the original file name extension, but make it lower-case if it was originally upper-case, a nice option if the cameras uses “ JPG” instead of “jpg”. The “-” before the “c” isn’t really necessary, but it puts a dash before the copy number. %%-c means that if two images have the same file name up to this point in the naming process, add “ a copy number which is automatically incremented” to give each image a unique name.This ensures a mostly unique filename, the next option will ensure it. %H%M%S means add the hour, minute, and second of the creation time, all represented by two digits.The underscore **_** means put in an underscore after the date part of the file name. %Y%m%d_ means the first part of the new file name should be composed of the four digit creation-date year, followed by the two digit month month and day, both represented by two digits.%Y%m%d_%H%M%S%%-c.%%le, used in conjunction with “ -d” specifies the format to use for the date and time when renaming the file.-d means “ Set format for date/time values”.
