Hi, newbie here...

Is it possible to edit mp 4 hd using free edit software in the market? I've tried a few (using windows 7) and tried imovie (lost frames). Do I need to convert format, and if so will hd quality be lost?

i'm using friend's sony bloggie mch 5 to do some simple shooting and am hoping to do some edit (overlay some music/shots/edit the shots & simple transitions and effect )

thanks and appreciated! am a wits end....

cheers!