A CPI file format is commonly associated with AVCHD video recordings, typically created by digital camcorders from brands like Sony and Panasonic. The CPI file contains important metadata related to the corresponding MTS video files, such as frame rate, resolution, aspect ratio, and timecode information. Although the CPI file does not hold actual video data, it plays a vital role in ensuring that the video playback and editing software can interpret and display the video clips correctly. When importing AVCHD footage into video editing programs, the CPI files help maintain synchronization and preserve details like clip duration and creation date.