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Output should be two JPG files named like "output-1.jpg" and "output-2.jpg". The convert command is part of ImageMagick so you'll need that and dependent packages installed to use it.
This command takes all CR2 files in the current directory and convert them into JPG
Runs the identify command (from ImageMagick) on each jpg file in the current directory and returns image details according to the format parameter. The example here returns:
Filename FileSize Compression Width Height
More information about the available format options can be found here: http://www.imagemagick.org/script/escape.php
I usually redirect the output to a text file using "> listofdetails.txt" at the end. Spreadsheet magic can then be applied.
Requires ImageMagick to be installed.
This command was stolen from @climagic on Twitter.
Probably a duplicate of command below, but this command uses slightly higher quality.
the "i" controls case sensitiveness. It's slightly inefficient since it uselessly renames .jpg to .jpg, but that's more than compensated by launching only one process instead of two, besides being shorter to write.
Use if you have pictures all over the place and you want to copy them to a central location
Find jpg files
translate all file names to lowercase
backup existing, don't overwrite, preserve mode ownership and timestamps
copy to a central location
This is handy for making screenshots of all your videos for referring to in your flv player.
Find all corrupted jpeg in the current directory, find a file with the same name in a source directory hierarchy and copy it over the corrupted jpeg file.
Convenient to run on a large bunch of jpeg files copied from an unsure medium.
Needs the jpeginfo tool, found in the jpeginfo package (on debian at least).