When scan the Adobe forum like forum.adobe.com we can find many friends are confused of how convert from SONY HD camera m2ts files for Premiere Pro CS5, CS4 HD editing? Not because the Adobe Premiere Pro doesn't support M2TS, as we can get from Adobe's website that Adobe support: "-M2T (Sony HDV), M2TS (Blu-ray BDAV MPEG-2 Transport Stream, AVCHD)."
If you have improved your CPU or RAM with the PC, but it still does nothing, don't complain because that when use Adobe Premiere Cs5 or Cs4, we should note that even high-powered computers struggle with AVCHD, so no matter what the machine is, transcending to something else first for Adobe Premiere is almost always a good idea when working with AVCHD. So the workable way can be convert AVCHD M2TS to Adobe easy handled DV or FLV format.
You can use Doremisoft M2TS to Adobe Pro Converter (Cs5/Cs4 included) to solve this problem easily and quickly. For it enables you import and convert AVCHD M2TS to Adobe Pro Converter Cs5/Cs4 most friendly DV and FLV format. And help you lower the AVCHD 1080p high resolution to 1280*720 or 640*480 lower resolution.
Step 1: After download M2TS to Adobe Pro Converter, install and run it directly.
Step 2: Load MTS file to the program by click "Add File".
Step 3: Hit lower right of "Profile"->Browse mouse to "Common Video"->Choose "DV" as output format.
Step 4: Click "Start" keystroke to begin MTS to DV conversion.