.MP4

.MP4 file extension

This is the basic program to work with .MP4 extension

QuickTime

QuickTime MPEG-4 Movie

Includes support for the key media formats, such as H.264 and AAC. The QuickTime web browser plug-in is no longer installed by default and is removed if you have a previous version of QuickTime on your PC. If you still need this legacy plug-in, you can add it back using the custom setup option in the installer... (more)

The program works with the following extensions: bmp, mp3, gif, mp4, jpg, swf, png, mkv, avi, psd, jpeg, mov, dv, au, qt, m3u, qtl, mps, mid, m4a, qup, aac, rts, amc, xpl, m4b, qif, ac3, amr, bwf, mac, mp2, m4p, sd2, caf, jp2, m4v, dib, sdp, mpa, m75, sdv, cel, mpe, jpe, smf, dif, rgb, smi, sgi, mpg, mpm, aif, flc, rmi, mpv, pct, sml, fli, m2a, snd, mqv, pic, swa, gsm, mmv, pls, ulw, kar, pnt, wav, qcp, vfw, m15, qti, 3g2, qht, m4e, m1v, m1a, 3gp, tif, tga, m2v, m1s, mpga, 3gpp, adts, midi, rtsp, cdda, pntg, qtif, mpeg, smil, mpg4, aifc, aiff, pict, qhtm, moov, 3gp2, tiff, m3url, movie and targa

.MP4 extension is also supported by the following programs:

RealPlayer

RealPlayer MPEG-4 File

RealPlayer is one of the most popular video player.
Windows Media Player

Windows Media Player MP4 File

A powerful and convenient media manager from Microsoft.
MediaMonkey

MediaMonkey MP4 Audio File

MediaMonkey is the movie and music organizer for the serious collector.
MpcStar

MpcStar MP4 video file

Plays all your movies and music downloaded from the internet.
VLC media player

VLC media player VLC media file (.mp4)

Plays most multimedia files as well as DVDs, Audio CDs, VCDs, etc.
AVS DVD Player

AVS DVD Player AVS DVD Player Files

AVS DVD Player plays movie DVDs, video and audio files right on your computer.
mpegable Player

mpegable Player MPEG-4 File

MPEG-4 player with postprocessing abilities.
Total Video Player by EffectMatrix Inc.

Total Video Player by EffectMatrix Inc. MySQL Tools for

Total Video Player is a media player supporting a vast number of file formats.
AVS Media Player

AVS Media Player AVS Media Player Files

Open videos with almost any file extension such as AVI, MPEG, WMV, MP4.
Winamp

Winamp Winamp media file

Winamp player is designed to cover the large area of media file types.
Haihaisoft Universal Player

Haihaisoft Universal Player MySQL Tools for

This program allows you to play your favorite multimedia files.
ALShow

ALShow ALShow MP4 File

Codecs included movie player plays videos without searching for codecs.
QvodPlayer

QvodPlayer MySQL Tools for

QVOD player (Nora) is a powerful universal player.
ALLPlayer

ALLPlayer MySQL Tools for

Watch movies with subtitles and many other cool functions.