Introduction to mainstream video formats and corresponding extensions overview

The Moving Picture Expert Group, which is the general format of the following video formats such as MPEG-1 and MPEG-2, is the format of VCD, SVCD, and DVD. The MPEG format is an international standard for moving image compression algorithms, which employs a lossy compression method to reduce redundant information in moving images.

The MPEG compression method preserves most of the same parts of the adjacent two pictures, and removes the redundant parts of the subsequent images and the previous images, thereby achieving the purpose of compression.

MPEG-1

Common extensions: .mpg, .mlv, .mpe, .mpeg, .dat

Common areas: computer video, video

Introduction: MPEG-1 standard was established in 1992, it is designed for media resources with data transmission rate below 1.5Mbps, is the digital storage media moving image and its audio coding International standards for design. This is the VCD production format we usually see.

MPEG-2

Common extensions: .mpg, .mpe, .mpeg, .m2v, .vob, .tp, . Ts

Common areas: computer video, video

Introduction: MPEG-2 was established in 1994, and is designed for high-quality industry standard image quality and higher transmission rate. The MPEG-2 format is mainly used in the production (compression) of DVD/SVCD, and also has a wide range of applications in some HDTV (High Definition Television Broadcasting) and some high-demand video editing and processing.

MPEG-4

Common extensions: .avi, .mov, .asf, .mp4

Common areas : Computer Video, Mobile Phone, Multimedia Terminal

Introduction: The MPEG-4 standard was developed in 1998 and is designed to play high-quality video of streaming media. It can be used with a narrow band. Frame reconstruction technology compresses and transmits data to achieve the best image quality with minimal data. The most attractive aspect of MPEG-4 is its ability to store small volume video files that are close to DVD quality.

MPEG-7

Introduction: The MPEG-7 standard is called "Multimedia Content Description Interface", which provides a variety of multimedia information. A standardized description that will be relevant to the content itself, allowing quick and efficient access to information of interest to the user. It will extend the limited capabilities of existing content-aware solutions and include more data types. In other words, MPEG-7 specifies a standard set of descriptors for describing various types of multimedia information.

MPEG-21

Introduction: The MPEG-21 standard is the integration of some key technologies through this integrated environment for global digital media. Resources are transparently enhanced to achieve content description, creation, release, use, identification, charge management, property rights protection, user privacy protection, terminal and network resource extraction, event reporting and other functions.

DivX/
XviD

Common extensions: .avi

Common areas: computer video , compressed disc

Introduction: DivX is a video encoding (compression) standard derived from MPEG-4, which is what we usually call the DVDrip format, which uses the MPEG4 compression algorithm, while comprehensive The technology of all aspects of MPEG-4 and MP3, it is said that DivX compression technology is used to compress the video image of the DVD disc, while compressing the audio with MP3 or AC3, then synthesizing the video and audio, and adding The video format formed by the corresponding external subtitle file. Its picture quality is almost equal to DVD, and its volume is only a fraction of the DVD. XviD is almost identical to DivX, it is open source DivX, no charge, and there is a charge for using DivX.

AVI

Common extensions: .avi

Common areas: computer

Introduction: Audio Video Interleaved, which is an audio video interlaced format. It was launched by Microsoft in 1992 and is known and familiar with Windows 3.1. The so-called "audio video interleaving" is the ability to interleave video and audio for simultaneous playback. The advantage of this video format is that the image quality is good and can be used across multiple platforms, but its disadvantage is that it is too bulky, and even worse, the compression standard is not uniform, so it is often encountered that the high version of Windows Media Player cannot be played. Early coding and editing of AVI format video, while the lower version of Windows Media Player can not play AVI format video with the latest encoding. Therefore, when we play some AVI format video playback, the video may not play or even play, but there are some inexplicable problems such as the inability to adjust the playback progress and the sound only without the image.

nAVI

Common extensions: .avi

Common areas: computer

Introduction: nAVI It is an abbreviation of newAVI, a new video format developed by an underground organization called ShadowRealm. It is a modification of the Microsoft ASF compression algorithm. In order to pursue compression ratio and image quality goals, nAVI has improved some of the shortcomings of the original ASF format and can have a higher frame rate. Of course, this comes at the expense of ASF's video streaming features. In summary, nAVI is an improved ASF format that removes the video stream features and can also be considered a non-network version of ASF.

WMV

Common extensions: .wmv

Common areas: computer video, network streaming

Introduction: Windows Media Video is a file compression format introduced by Microsoft that uses independent encoding and can watch video programs directly on the Internet. Key benefits of the WMV format include: local or network playback, scalable media types, scalable media types, multi-language support, environmental independence, rich inter-flow relationships, and scalability.