I have an HDC-SD9 that records in 1920x1080i (15-17mbps) .MTS - 29.970 (or 976) FPS - AVCHD
I'm going to buy a GoPro HD that records in 1920x1080p 15mbps .MP4 - 30.00 FPS - H.264

When I render in Sony Vegas what would be better? .m2ts or .mp4
I'm not sure what I should do with those frame rates either, all I know is I should render in progressive (de-interlacing the HDC-SD9)
But if I use .mp4 then I am compressing my AVCHD but I'm not sure if putting h.264 MPEG4 in a .m2ts container will degrade the quality??