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What is MP4?
MP4 (MPEG-4 Part 14) is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images. It is a standard specified as a part of MPEG-4.
History
MP4 was introduced in 2001 as a successor to the MPEG-4 Part 12 format. It was developed by the Moving Picture Experts Group (MPEG) and is based on the QuickTime File Format (QTFF) used by Apple's QuickTime framework.
How it works
MP4 files contain various types of data streams, including video, audio, and metadata. The format uses a hierarchical structure of boxes (also called atoms) to organize the data. Each box contains a specific type of information, such as video frames, audio samples, or metadata about the content.
How to open MP4 files
MP4 files can be opened with most modern media players and devices. Here are some common ways to open MP4 files:
- Windows Media Player
- VLC Media Player
- QuickTime Player (Mac)
- iTunes
- Windows 10 Movies & TV app
- Most web browsers (for streaming)
- Most smartphones and tablets
Tips for working with MP4 files
Here are some useful tips when working with MP4 files:
- MP4 files are widely supported across different platforms and devices
- They offer good compression while maintaining quality
- MP4 files can contain multiple audio tracks and subtitles
- The format supports streaming and progressive download
- MP4 files can be easily shared and uploaded to various platforms
Useful links
For more information about MP4 files, you can visit these resources:
- MPEG-4 Part 14 Specification
- ISO/IEC 14496-14:2003 Standard
- MP4 File Format Documentation
What is AVI?
AVI (Audio Video Interleave) is a multimedia container format introduced by Microsoft in 1992. It is one of the oldest video file formats and was designed to store both audio and video data in a single file, allowing synchronous audio-with-video playback.
History
AVI was introduced by Microsoft in 1992 as part of its Video for Windows technology. It was one of the first formats to allow audio and video to be played together on personal computers.
How it works
AVI files use a simple structure where audio and video data are stored in alternating chunks. The format supports various codecs for both audio and video compression, making it flexible but sometimes leading to compatibility issues.
How to open AVI files
AVI files can be opened with many media players and devices. Here are some common ways to open AVI files:
- Windows Media Player
- VLC Media Player
- Media Player Classic
- PotPlayer
- Most modern web browsers
- Most video editing software
- Many media players on mobile devices
Tips for working with AVI files
Here are some useful tips when working with AVI files:
- AVI files are widely supported across different platforms
- They can store both audio and video in a single file
- The format supports various codecs for compression
- AVI files can be large due to limited compression options
- Some AVI files may require specific codecs to play properly
Useful links
For more information about AVI files, you can visit these resources:
- Microsoft AVI File Format Documentation
- AVI File Format Specification
- Video for Windows Documentation
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