GENCLOCKIMG genclockimg is a small program to generate clock face PNG images. I made it to generate a time index watermark for my timelapse videos. It is written in C and uses cairo and libpopt. These are fairly common and chances are high you already have this installed on your system. I used rahra's cairo_jpg library to handle JPEG images. See https://github.com/rahra/cairo_jpg BUILDING To build genclockimg you need libcairo and libpopt and their accompanying dev packages installed. You'll also need a C compiler and GNU Make. To build the program: make To test: ./genclockimg A file 'out.png' should appear. To install: make install To uninstall: make uninstall RUNNING By default, running the program will create a 128x128 PNG image called 'out.png' in the current directory. The image will contain a simple analog clock indicating the current time. OPTIONS -o filename Output filename. The .png extension is NOT added automaticly! The output is always PNG, even if you name the file differently. -t HH:MM Time to show on the clock -w width Width of the clock image in pixels -h height Height of the clock image in pixels EXAMPLES Generate a series of clock images based on the timestamps of a series of source images: for file in *.jpg; do genclockimg -t `date -r "${file}" +"%H:%M"` -o "${file}-clock.png"; done LICENSE genclockimg is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. genclockimg is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU General Public License along with genclockimg. If not, see https://www.gnu.org/licenses/. Copyright (c) 2022, Stijn Buys