All camcorders use a codec when both encoding video taken and playing files - this means not only should the file format of anything you want to transfer onto it match but also the codec should match.
Sony unfortunately often choose to use proprietary codecs and file formats (mt2s is a common AVCHD sony file format) - ones they have developed and have not released to the public.
To find out what codec is used you can download and install GSpot from the link in my sig. Once installed open a working video file (preferably a video you have taken) transferred from your camera to your computer.
GSpot will tell you which codec has been used and if you have that codec on your computer - you should if you have installed the Sony software that came with the camera.
When you want to transfer video to your camera you will need to transcode it using that codec - Format Factory is a good package for that job - link again in my sig
Sony unfortunately often choose to use proprietary codecs and file formats (mt2s is a common AVCHD sony file format) - ones they have developed and have not released to the public.
To find out what codec is used you can download and install GSpot from the link in my sig. Once installed open a working video file (preferably a video you have taken) transferred from your camera to your computer.
GSpot will tell you which codec has been used and if you have that codec on your computer - you should if you have installed the Sony software that came with the camera.
When you want to transfer video to your camera you will need to transcode it using that codec - Format Factory is a good package for that job - link again in my sig