editing Large Mpg files, suggestins needed

using replay video capture i am successfully recording some video content i want

sometimes there is a pause in the streaming video and i record the pause

it is a nuisance, one i would like to edit out before converting the files to another format

i am happy with the resolution the clarity the quality and the 6000 bitrate ,

but it does produce large files, some times 2 or 3 gig,

i need suggestions for software that will edit these files
or split edit and perhaps rejoin, with out re-encoding

free would be my first choice

but will buy if that is only /best way