MP4 Files Explained
The easiest place to start is stating the .MP4 is a file extension that is associated with different applications. A lot of the computing world has heard of an MP3 (via iTunes, an MP3 Player, or by downloading music), but not everyone fully understands the .MP4 extension.

MPEG-4 Part 14, or as it is commonly referred to as, MP4, much like the MP3, is a multimedia digital format that sees its applications tied to using, playing, sharing and storing both video and audio. MP4 extensions also have the ability to store subtitles, certain still images and other data.

The MP4’s popularity and use stems in large part because the container format of the extension allows for Internet streaming. Now within the streaming and playing capabilities, it should be noted that not all “MP4 Players” or devices claiming to play MP4 file extensions necessarily play the MPEG-4 part 14 format. Some machines claiming those capabilities are actually just .MP3 players that are equipped with AMV video or another video format form.

As more and more computer files needed to be able to handle both audio and video at the turn of the century, the MP4 file extension was created, mainly with QuickTime format specifications, in 2001, the same year it was published. Not until 2003 did we see the MP4 format that is widely used today.

Opening an MP4 is like anything else, just double click and it will pop up. It should be noted, however, that opening MP4 files that are from non-trusted or outside sources can lead to viruses and malware. Windows Media Player, for example, will run your MP4s to play music and watch videos.

If you experience problems with opening your MP4 files, you may need software (like MPEG-4 codec) so your PC can recognize the MP4 files.

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DLL
EXE
MP3
MP4
XLS (XLSX)