Convert AAC to MP4
You can convert AAC file to MP4 as well as to variety of other audio formats with free online converter.

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Advanced Audio Coding
File extension | .aac |
File category | audio |
Description | A proprietary format with lossy compression, which have been created as an alternative for MP3 with a higher quality of coding. Overtones out of human perception are being removed. AAC is two times less than MP3, which means 1/10 of CD digital data. The format has been widely used since 1997 as the seventh release of the MPEG-2 family. As hardware players supply it, the format is highly demanded by music fans. It has been widely spread in Apple production and is being used by default in iTunes. |
Technical details | The format conception is similar to MP3, but it is more advanced. Being able to execute larger compression, it is represented as a separate segment of MPEG-4 standard used to create compact audio files. AAC is highly efficient with variable and continuous bitrate, with a sampling frequency of 8-96 kHz. The current version complies with the standard of ISO/IEC 14496-3. Compression is performed based on an auditory masking effect that provides data reduction with no deterioration for sound quality. |
Programs |
Microsoft Windows Media Player
VLC media player
MPlayer
Foobar2000
Winamp
Apple iTunes
Audacity
|
Developer | Bell Labs, Dolby Laboratories, Sony, Nokia, Coding Technologies |
MIME type |
audio/aac
audio/aacp
audio/3gpp
audio/3gpp2
audio/mp4
audio/mp4a-latm
audio/mpeg4-generic
audio/x-aac
audio/x-m4a
audio/x-m4p
audio/x-m4b
audio/mp4a
audio/mpga
|
MPEG-4 Video File
File extension | .mp4 |
File category | video |
Description | The MP4 files (MPEG-4 part 14 files) are the multimedia files used with multiple stations and video players simultaneously. They can store digital audio streams and digital video, and other suitable amounts of data like subtitle tracks. MP4 video format is a widespread file format due to its very own container format. It is also used with multiple platforms such as iTunes, PlayStation, and portable PSP. It is also a popular file format for streaming over the Internet. For instance, YouTube videos have MP4 extension. |
Technical details | The technical details of MP4 files differ in significant aspects and are unique as well, first released in 2001 under ISO/IEX 14496-1:2001 standards. It uses an AAC encoding to wear off unauthorized users from copying the data. The main purpose is streaming rather than sending video or audio information. MP4 files can be used to store audio streams and text information, subtitles, and still images. At the same time, MPEG format can’t do this. Anyhow the processing of data into MPEG-4 part 14 requires private streams such as the use of hint tracks to include the information. |
Programs |
Microsoft Windows Media Player
VLC media player
MPlayer
Eltima Elmedia Player
Winamp
Apple QuickTime Player
Apple iTunes
|
Developer | Moving Picture Experts Group |
MIME type |
audio/mp4
video/mp4
|