1. Description

RenRot is a program to rename and lossless rotate (for now only JPEG format) files according to their EXIF tags values.

To prevent incorrect associations, some explanation is needed here. The name of project is short form of ‘REName and ROTate’ and no other interpretation will be used.

Renrot is intended to work with a set of files containing EXIF data and can do two things to them: rename and rotate. A set of files can be given either explicitly or using the ‘--extension’ option, which select the files with the given suffix. Renrot operates on files in current working directory, unless given the ‘--work-directory’ option, which changes this default.

Renrot renames input files using a flexible name template (which, among others, uses DateTimeOriginal and FileModifyDate EXIF tags, if they exist, otherwise names the file according to the current timestamp). Further, renrot can aggregate files according to the shooting time period or to a given template.

Additionally, it rotates files and their thumbnails, as per Orientation EXIF tag. If that tag is absent, the program allows to set rotation parameters using ‘--rotate-angle’ and ‘--rotate-thumb’ command line options. This is currently implemented only for JPEG format.

The program can also place commentaries into the following locations:

Commentary tag from file (see ‘--comment-file’ in see section Configuring Renrot)
UserComment tag from configuration variable (see see section Tags)

Personal details may be specified via XMP tags defined in a configuration file, see see section Tags.

In addition, renrot can aggregate all files in different directories, according to a given date/time pattern template, set with ‘--aggr-template’.

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Why RenRot?

Several projects like RenRot are available in the net, but why to choose namely RenRot? Because:

it does just what it would do - renames and rotates, nothing more than that;
it is pure CLI with all it's advantage (no need KDE or any other monster to run);
it uses Image::ExifTool (the best open tool to work with EXIF data) and libjpeg6 (the best open tool to operate JPEG format files, to correctly rotate both, the entire file and the thumbnail inside it);
it has very much flex file naming and aggregation template engines;
it uses original algorithm of smart Orientation tag rotation;
it works in batch mode.