Convert mv4 to mpa

What is the difference between .mv4 and .mpa?

Description: M4V is a video container that stores audio and video data used for iTunes files. Files of this type may be protected from illegal viewing and copying with Apple FairPlay DRM. In this case audio or video files should be bought in iTunes store. Not protected files can be viewed almost in any modern player because the format is based on MPEG-4 structure.; The MPA file format, standing for MPEG-2 Audio File, is designed to store audio data compressed using the MPEG-2 Audio coding standard. This format is a successor to the MPEG-1 standard, offering enhancements like improved audio quality and support for multiple audio channels, thus enabling surround sound experiences. MPA files are commonly used for both music and video soundtracks due to their efficient compression, which preserves sound quality while reducing file size significantly.