MP4 to 3GP

Convert MP4 to 3GP - online and free - this page also contains information on the MP4 and 3GP file extensions.

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File extension .mp4
Category Video File
Description MP4 files (MPEG-4 Part 14) are multimedia files. MP4 is a container format that can store video, audio and subtitle data (as well as more depending on content). Since stores like iTunes uses this container format, and it is used with iPod and PlayStation Portable (PSP), MP4 files have become more common.
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Technical Details MPEG-4 Part 14 or MP4, 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 video and digital audio 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. A separate hint track is used to include streaming information in the file. The only official filename extension for MPEG-4 Part 14 files is .mp4.
Associated programs Apple QuickTime Player
Apple iTunes
Microsoft Windows Media Player
VideoLAN VLC Media Player
Developed by Moving Picture Experts Group
MIME type audio/mpeg
Useful links Detailed information on the MP4 File Format
How to play MP4 files
Convert MP4 file
File extension .3gp
Category Video File
Description 3GP is a file format designed for video on mobile phones. 3GP is a container that facilitates the creation, editing, transfer and viewing of video and audio using a 3G mobile phone. It is supported by most smartphones, including the Apple iPhone.
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Technical Details 3GP is based on the structure of MPEG-4 Part 14, otherwise known as MP4. 3GP was designed to reduce the overhead in terms of storage and bandwidth to allow video files that could be handled by smartphones.
Associated programs QuickTime Player
VLC Media Player
Windows Media Player
Developed by 3rd Generation Partnership Project (3GPP)
MIME type video/3gpp
audio/3gpp
Useful links More Information on 3GP
Official Specification from 3GPP Organisation
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