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Mp4 MPEG-4 Video File The MP4 file format and the.mp4 filename extension refer to the MPEG-4 part 14 digital multimedia format developed by the Moving Picture Experts Group. It is used as a multimedia container to wrap encoded digital video and audio streams, including subtitles and still images if required. In recent decades, the format has been popularized as one of the main standards for streaming media over the internet and other computer networks and for the digital distribution of large multimedia files. MP4 supports a large number of compression audio codecs allowing files in this format to maintain a relatively small size without discounting playback quality. 3gp 3GPP Multimedia File The 3GP file format and its associated filename extension.3gp is an audio, video, and text container developed by the 3rd generation partnership project.
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The target market for the 3gp file format is 3G enabled UMTS mobile phones through associated UMTS multimedia services. Though mobile devices operating on high speed networks are the intended hardware associated with playing.3gp files, many PC codec packs exist which grant compatibility for.3gp playback.
The format has a basic profile in which files of this format do not reference any external media sources and support for audio, video, and text is limited to a single track.