Files that contain the .mpl file extension are commonly associated with AVCHD high-def video files.
The AVCHD file format was created as a joint venture between the Panasonic and Sony brands. When certain Sony and Panasonic HD digital video cameras record 1080i and 720p signals using the proprietary codec technologies, the resulting video files are saved with the .mts file extension an an associated MPL file is also created.
The MPL file that is created with the MTS file is used for the navigation of the MTS file and contains a directory of the information that the MTS file contains.
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