sajjo go to
http://www.boilsoft.com/videosplitter/.
its a shareware/freeware excellent video splitter.
it works with every format .
download and install it.
from its file-open menu open the file..(browse button available to search from hard disk)
after opening it the whole file will show seond by second , you can mark the spilt starting button where you wnat to start the video file and again mark the split ending point.
done...your file will begin and end where exactly whr u like.
read help files thr, u'll unstand.
thanks.