The MPEG-4 Part 14 or MP4 file format, which is used for media storage, is extended by the M4P file format. The fact that M4P files are encrypted and have the DRM system is their strongest feature. Therefore, you must follow a set of instructions to authorise your computer using Apple iTunes before you may play the file.
The M4P file is primarily connected to the Protected AAC file created by Apple Inc. and employs Apple’s “FairPlay” system DRM. This limits copying of the data and necessitates system authorization using the Apple iTunes programme.
list of programs that can open M4P documents:
- VideoLAN VLC Madia Player