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| Name | MP4 | M4V |
| Full name | MP4 - MPEG-4 Part 14 | M4V - Raw MPEG-4 |
| File extension | .mp4, .m4a, .m4p, .m4b, .m4r, .m4v | .m4v |
| MIME type | video/mp4 | video/x-m4v |
| Developed by | International Organization for Standardization | Apple Inc. |
| Type of format | Media container | Video container |
| Description | MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet.MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet. | The M4V file format is a video container format developed by Apple and is very similar to the MP4 format. The primary difference is that M4V files may optionally be protected by DRM copy protection. Apple uses M4V to encode video files in its iTunes Store. |
| Technical details | Most kinds of data can be embedded in MPEG-4 Part 14 files through private streams. A separate hint track is used to include streaming information in the file. The registered codecs for MPEG-4 Part 12-based files are published on the website of MP4 Registration authority (mp4ra.org). | Unauthorized reproduction of M4V files may be prevented using Apple's FairPlay copy protection. A FairPlay-protected M4V file can only be played on a computer authorized (using iTunes) with the account that was used to purchase the video. |
| Associated programs | Windows Media Player, RealPlayer, MPlayer, Media Player Classic, VLC Media Player, K-Multimedia Player | Apple iTunes, Apple QuickTime Player, Media Player Classic, K-Multimedia Player, RealPlayer, Zoom Player, VLC media player |
| Wiki | https://en.wikipedia.org/wiki/MPEG-4_Part_14 | https://en.wikipedia.org/wiki/M4V |