Information about the .mp4 (mp4) file type

Below is all the information we have available on file about the .mp4 (mp4) file type.

MPEG Audio Layer 4 file. A .mp4 file is a container, meaning that it can contain any number of audio, subtitle or video streams.

Contrary to the MPEG 4 specification, Apple use the .m4a file extension but the two file formats are otherwise identical.

Where this is available we would like to include file format information on .mp4 files, as well as information on how to view or open files of type .mp4. If you know of any information which we have missed then please let us know.