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MPEG-4

MPEG-4 Part 14, formally ISO/IEC 14496-14:2003, is a multimedia container format standard specified as a part of MPEG-4. It is most commonly used to store digital audio and digital video streams, especially those defined by MPEG, but can also be used to store other data such as subtitles and still images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. The official filename extension for MPEG-4 Part 14 files is .mp4, thus the container format is often referred to simply as MP4.


Note that many devices advertised as "MP4 players" are simply AMV video capable MP3 players, and do not play MPEG-4 part 14 or any other MPEG-4 format.


.MP4 versus .M4A file extensions

The existence of two different file extensions for naming audio-only MP4 files has been a source of confusion among users and multimedia playback software. Since MPEG-4 Part 14 is a container format, MPEG-4 files may contain any number of audio, video, and even subtitle streams, making it impossible to determine the type of streams in an MPEG-4 file based on its filename extension alone. In response, Apple Inc. started using and popularizing the .m4a file extension. Software capable of audio/video playback should recognize files with either .m4a or .mp4 file extensions, as would be expected, as there are no file format differences between the two. Most software capable of creating MPEG-4 audio will allow the user to choose the filename extension of the created MPEG-4 files.



Related Windows OS Software
iSkysoft DVD to MP4 Converter provides a series of powerful settings such as selecting DVD subtitle and audio track, choosing any chapters or titles to convert, setting video brightness, contrast, saturation.
ImTOO DVD to MP4 Converter is a fast, easy to use MP4 converter which helps you rip DVD, convert DVD to MP4, DVD to iPod MP4, DVD to PSP MP4 with great quality.
Aimersoft DVD to MP4 Converter is powerful yet easy-to-use DVD to MP4 converter that can convert DVD to MP4 (MPEG-4), H.264, and rip DVD to DivX video for all MP4 players.
Nidesoft MP4 Video Converter supports so comprehensive video formats including AVI, MPEG, DivX, MOV, WMV, MP4, 3GP, VOB, VCD, H.264/MPEG-4 AVC, H.264/PSP AVC etc.
ImTOO MP4 Video Converter helps you convert all popular video formats to MP4 such as MPEG to MP4 converter, AVI to MP4 converter, MP4 to AVI converter. MP4 converter also supports PSP H.264 Codec.
AVS Video Converter Convert video, split, join, capture, edit & burn DVD. All key formats are supported! All key formats are supported: AVI, MP4, WMV, 3GP, SWF, DVD, VOB, VRO, MPG, DAT, VCD, ASF, ASX, OGM, FLV.
Best Photos to MP4 Movie Converter is a powerful movie maker tool. It is also easy-to-use. You can create your favorite movie with your digital photos and music.
Related Mac OS Software
Wondershare Video to MP4 Converter for Mac is a powerful MP4 video converter that can convert video to MP4 for playback on iPod (touch, classic, nano), iPhone, Apple TV and PSP and so on.
Wondershare DVD to MP4 Suite for Mac Provide powerful functions such as dvd/video length trimming, DVD subtitle and audio track selection, video cropping, file merging, video effect adjustment and video filter and so on.
iSkySoft DVD to MP4 Converter for Mac provides you with various output MP4 video formats for iPhone, iPod, Apple TV, PSP and so on. It can also just rip DVD audio to M4A for playback on your players.
Wondershare DVD to MP4 Converter for Mac is one of the first DVD to MP4 converters for Mac OS users to rip DVD to MP4 files for playback on iPod, PSP, Apple TV, iPhone andother popular MP4 players.
XiliSoft DVD to MP4 Converter for Mac proves to be excellent Mac DVD Ripper, Mac DVD to MP4 Converter which can fulfill your dream to put DVD on MP4 player as Zune, video iPod, Archos, iRiver, Creative Zen, etc.
XiliSoft MP4 Converter for Mac is specially made for Mac users. With versatile functions and various settings, it can convert video and audio files including MP4, M4V, WAV, WMA, M4A, AAC, MP3, MP2, 3G2, AC3 to MP4 video.