Quick time Pro not seeing MTS video from Panasonic handheld

I just bought Quick Time Pro to cut and trim video from my Panasonic HD handheld camera video files. But I can not open or edit these MTS files in Quick Time Pro. I even tried converting the MTS video to MP4 files and it gives me an error trying to open in Quick Time Pro. I also tried converting the MTS file to an MOV file and I can open and play video file,but I can not trim edit and save file. Anybody have an recommendations?

QT 7 (player or keyed for "Pro" use) does not handle "transport stream" files. It only plays/edits "program stream" files. Use an app like HandBrake to convert your MTS files to MP4 (H.264/AAC) files which can then be edited by QT 7 Pro. MOV refers to the file container—not the compressed data contained within the file. If you cannot edit MOV files, then it is most likely that you did not compress the audio and/or video data to a format that is QT 7 compatible.