MPEG-4 Part 14 (formally ISO/ IEC 14496-14:2003) is a standard specified as a part of MPEG-4. The only filename extension for MPEG-4 Part 14 files as defined by the specification is.
Like most modern container formats, it allows streaming over the Internet. MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images.
