From my own experience, there are two ways to import Sony HD camcorder AVCHD videos to PMB program.

1. Connect your Sony HD camcorder to your PC via USB cable, and then run PMB program to transfer the AVCHD videos from Sony camcorder directly, instead of transferring the AVCHD video from Sony camcorder to PC.

2. If you have transferred the Sony HD camcorder AVCHD video to your PC already, the AVCHD videos become video files in .mts extension which are not supported by PMB.

However, I couldn't find any information about the video format supported by PMB. If PMB supports importing AVI or MP4 video, you could convert the .mts to .avi/mp4 at first.

I am not sure whether my answer is useful to you.

Regards,