AVI means the Audio Video Interleaved, that is Audio Video Interleave formats. Is combined with simultaneous voice and video file format. It uses a lossy video compression method, but the compression is relatively high, so despite the picture quality is not very good, but it is still very wide range of applications. AVI support for 256 colors, and RLE compression. AVI information is mainly used in multi-media CD-ROM is used to save the television, film and other image information.
It was launched in 1992 by Microsoft, along with Windows3.1 been recognized and well known. The so-called \"Audio Video Interleaved\" is a video and audio can be intertwined with synchronized playback. This video format has the advantage of image quality, and can be used across multiple platforms, its drawback is that the volume is too large, but even worse is the compression standard is not unified, the most common phenomenon is the high version of the Windows Media Player can not play with an early encoded AVI format video editing, while the low version of the Windows Media Player can not play again encoded using the latest editing AVI format video, so we have a number of AVI format video playback often occur due to problems caused by video encoding video does not play or Even if it can play, but there does not adjust the playback progress and play with just the sound is not the image and some baffling problems, if the user doing AVI format video player encountered these problems, you can download the appropriate decoder to resolve. Is currently the mainstream of the video file. This format can be seen everywhere, such as some games, educational software title sequence, multimedia CD-ROM, there will be a lot of AVI.
Now, in the WINDOWS 95 or 98 years can be broadcast directly to AVI, but also the format of its own there are several, the most common are Intel Indeo (R) Video R3.2, Microsoft video and so on. avi contains three parts: file header, data blocks and index blocks.
One data block that contains the actual data stream, that is, images and sound sequence data. This is the main body of the file, the file size is the main part of the decision. Video file size is equal to the file data rate multiplied by the length of video playback, index blocks, including a list of data blocks and their location in the document to provide the document data random access capability. File header, including general information files, defining data formats, compression algorithm used and other parameters.
nAVI Format
nAVI is newAVI acronym, is a underground organization called ShadowRealm developed a new video format (AVI with our above mentioned format, there is not much contact). It is by the Microsoft ASF compression algorithm changes come, but it is with the network described below image in the video differ from ASF video format, it is at the expense of the original ASF video file video \"streaming\" feature by increasing the expense of the frame rates to a substantial increase in the clarity of ASF video files.
DV-AVI format
DV in English stands for Digital Video Format, is a Sony, Panasonic, JVC and other manufacturers to put forward a number of home digital video formats. Currently very popular is to use this format digital cameras record video data. It can be through the computer\'s IEEE 1394 port to transfer video data to a computer, can also be computer edited video data back to record to digital cameras. This video format file extension is usually. Avi, so also known as DV-AVI format.
Currently (October 2007) AVI image reversal is probably because storm video and windows media player conflict, to download a complete DIVX decoder can be resolved.
In early 1992, Microsoft introduced the AVI technology and its applications, VFW (Video for Windows). In the AVI file, motion picture and associated audio data is stored in a manner interwoven and independent of hardware devices. This is organized by the turn of the way audio and video data can make read the video data stream can be more effectively from the storage media can be a continuous information. Constitute the main parameters of an AVI file, including video parameters, parameters, and Audio Compression parameters:
AVI is not MPEG so complex, from WIN3.1 times, it has been published in. Its most immediate advantage is that is compatible with good, call convenient and good image quality and, therefore, is often compared with the DVD and said. But its disadvantages are also obvious: the size large. But also because this point, we only saw the MPEG-1 and MPEG-4 was born. 2 hours of AVI video file size with no difference between MPEG-2 count, but this is only for the standard resolution for the purposes of: According to different application requirements, AVI resolution can be freely adjusted. Window, the greater the greater the amount of data files. Lower resolution can significantly reduce its size, but the image quality would definitely suffer. With the MPEG-2 format file size is almost the case, AVI format, in terms of video quality is relatively worse, but do not make up the configuration of the computer much, has often been the first good record AVI format video, and then converted to other formats.