avidemux: avidemux (versatile video editor with a Qt gui)
avidemux:
avidemux: Avidemux is a free video editor designed for simple cutting
avidemux: filtering and encoding tasks.It supports many file types,
avidemux: including AVI, DVD compatible MPEG files, MP4 and ASF, using 
avidemux: a variety of codecs. Tasks can be automated using projects, 
avidemux: job queue and powerful scripting capabilities.
avidemux:
avidemux:
avidemux: avidemux home: http://avidemux.berlios.de/
avidemux:

NOTE #1:
Dependends on these packages:
a52dec
aften
faac
faad2
lame
libdca
x264
xvidcore

NOTE #2:
Since avidemux is a video editor it needs to be able to encode audio and video
formats. I decided that it would cripple the program too much by removing the
ability to encode MP3 and AAC audio so I only provide the build script plus
sources (on http://slackware.com I can not store mp3 or aac encoder software).
You can get the binaries at:
  http://slackware.org.uk/people/alien/restricted_slackbuilds/avidemux/
This is also the place to get the dependency packages 'lame' and 'faac'.