If you want to manipulate your VCD/DVD Videos , there is a good tool Avidemux is available in Ubuntu / Debian. Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It supports many file types, including AVI, DVD compatible MPEG files, MP4 and ASF, using a variety of codecs. Tasks can be automated using projects, job queue and powerful scripting capabilities. Avidemux is available for Linux, BSD, Mac OS X and Microsoft Windows under the GNU GPL license.
Install in Ubuntu / Debian
or use synaptic package manager.