Watching a movie and the dialogue is too quiet and the action too loud? Use VLC's built in Dynamic Compression tool - Some starter settings.
Miro Video Converter FFMPEG Conversion Matrix
dvd2mkv - a simple bash script that recodes DVDs to mkv (h264+ac3+subs)
Monitor/TFT Auflösung berechnen
"This guide will teach you the basics of DVD encoding using MEncoder, the H.264 and AAC encoders, and the Matroska wrapper." (needs some knowledge on video-encoding, though)