Serveral useful recipes for manipulation video with ffmpeg.
Articles about howto
We can use PostScript’s Endpage procedure to e.g. add a signature to each page of a PDF file, using only ghostscript.
Before the rise of git, I used rcs as my version control system. Because I want to standardize on git, I am slowly converting old repositories.
In this article I’ll be converting my old perl scripts in ~/src/perl.
By accident I checked 60-odd full-size photographs into the git history of my website. I shrunk them in a next commit, but the history was still there leading to a bloated .git directory. This took a lot of time when making backups. This documents how I cleaned up this mess.
This article contains several useful tricks for manipulating PDF files.
The focus of this article is on Open Source and Free software, that are available for UNIX-like operating systems. These tools are made for use on the command-line of a shell.
Using Acrobat Reader’s ability to add text et cetera has proven unreliable for me. On multiple occasions I have lost all the text added to a PDF file. When your filling in 20-plus pages worth of permit forms this is a huge waste of time and extremely annoying.
So I set out to find another way using the free and open-source tools I have available.
This article is a write-up of what I learned trying to extract information from ms-office xlsx files using Python.