Hello,
I would like to share with all of us the joy to have found a little gem to edit MP4 file encoded by my trustee PVR1000 (asian version of neuros recorder)[

] !
This program is edited by Squared 5 and called "MPEG Streamclip" :
http://www.squared5.com/Read the manual to learn that you can edit (trim for example) your MPEG-4 movie and save the result without any compression :
you have just to save the file with the .mp4 extension [

]!
Hope it helps !
Pierre-Francois Bonnefoi