myCLIPrompt:~/Downloads/temp/clips$ mencoder -ss 00:43:13 -endpos 00:02:12 -oac copy -ovc copy The.Original.Video.[VTV].mp4 -o TheClip.mp4

MEncoder SVN-r33713-4.6.1 (C) 2000-2011 MPlayer Team

WARNING: OUTPUT FILE FORMAT IS _AVI_. See -of help.
success: format: 0  data: 0x0 - 0x19148a83
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang und
VIDEO:  [H264]  720x404  24bpp  29.970 fps  843.8 kbps (103.0 kbyte/s)
[V] filefmt:44  fourcc:0x34363248  size:720x404  fps:29.970  ftime:=0.0334
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 48000 Hz, 2 ch, s16le, 143.0 kbit/9.31% (ratio: 17880->192000)
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
videocodec: framecopy (720x404 24bpp fourcc=34363248)
Audio format 0x4134504d is incompatible with '-oac copy', please try '-oac pcm' instead or use '-fafmttag' to override it.

Exiting...

avconv -i input.mp4 -ss 00:00:15 -t 00:00:10 -codec copy output.mp4

ffmpeg -i input.mp4 -ss 00:00:15 -t 00:00:10 -c:v copy -c:a copy output.mp4

ffmpeg -i InputFile -ss StartTime -t Duration Outputfiless
ffmpeg -i input.mp4 -ss 00:07:38 -t 00:07:36 output.mp4