You can quite easily use MEncoder to cut the video file using the following options.
Option | Param | Meaning |
-ss | 12 | Skip to specified time (in seconds) |
-endpos | 1400 | Copy video and audio until you time specified is reached (in seconds) |
-oac | copy | Pass through the audio stream |
-ovc | copy | Pass through the video stream |
-o | file.avi | Output file name |