Convert and cut an avi file using mencoder from MPlayer

• To convert an avi file to rmvb using mencoder try:
  

  mencoder "src.avi" -o "dest.rmvb" -ovc lavc -lavcopts vcodec=mpeg4 -oac mp3lame

  If real player fails to play generated file, then play it using mplayer.
• To cut an avi file (5 seconds is the total length to cut), use following command:
  

  mencoder -ss 00:10:10 -endpos 00:05:00 -ovc copy -oac copy "src.avi" -o "dest.avi"