MP4 files (MPEG-4 Part 14) are multimedia files. MP4 is a container format that can store video, audio and subtitle data (as well as more depending on content). Since stores like iTunes uses this container format, and it is used with iPod and PlayStation Portable (PSP), MP4 files have become more common.
MPEG-4 Part 14 or MP4, formally ISO/IEC 14496-14:2003, is a multimedia container format standard specified as a part of MPEG-4. It is most commonly used to store digital video and digital audio streams, especially those defined by MPEG, but can also be used to store other data such as subtitles and still images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. A separate hint track is used to include streaming information in the file. The only official filename extension for MPEG-4 Part 14 files is .mp4.
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The MOV file format is most commonly associated with Apple and the QuickTime video clip. The file format was developed by Apple as was QuickTime Player, it is compatible with both the Microsoft and MacOS platforms. MOV files are capable of storing two or more tracks which can be video, audio, text, graphics or effects. This flexibility makes this file format very popular for music and video editing.
MOV files use a proprietary compression algorithm and each track that is held within the file is made up of an encoded media stream or a reference to a media stream that is located in another file - this allows the embedding of existing media. QuickTime player which was developed and created by Apple allows a user to open and play .MOV files and later version of QuickTime Player, such as QuickTime Pro allows the user to edit and export .MOV files.
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