1 *.MPEG/。 MPG/。 DATMPEG is also the abbreviation of moving picture expert group. This format includes MPEG- 1, MPEG-2, MPEG-4 and other video formats. MPEG- 1 is considered to be the most widely used, because it is widely used in the production of VCD and the network application of downloading some video clips. Most VCDs are compressed in MPEG- 1 format (the recording software will automatically convert MPEG- 1 into. DAT format). Using the compression algorithm of MPEG- 1, you can save a 65438. MPEG-2 is used in DVD production, and also widely used in some HDTV (High Definition Television Broadcasting) and some demanding video editing processes. A movie with a length of 120 minutes can be compressed to a size of 5-8 GB by using the compression algorithm of MPEG-2 (the picture quality of MPEG-2 is incomparable to that of MPEG- 1).
2 *.AVIAVI, English abbreviation for audio and video interleaving. AVI is a video format released by Microsoft, which has existed in the video field for several years. AVI format is convenient to call and the image quality is good, but the disadvantage is that the file is too large.
3 *.RA/RM/RAM*。 RM, one of the audio and video compression standards formulated by Real Networks, what Real Player can do is to use Internet resources to broadcast these audio and video that meet the technical specifications of Real Media live. The Real Media specification mainly includes three types of files: RealAudio, Real Video and RealFlash (a new generation of high compression ratio animation format jointly launched by RealNetworks and Macromedia). REAL VIDEO (RA, RAM) format is positioned in the application of video streaming from the beginning, and it can also be said that it is the originator of video streaming technology. You can realize uninterrupted video playback when using a 56K modem to dial up the Internet, but the picture quality is worse than that of VCD. If you have seen those RM-compressed DVDs, you can clearly compare them.
4 *. MOV friends who have used MAC should have some contact with QuickTime. QuickTime was originally Apple's image and video processing software for Mac computers. Quick-Time provides two standard image and digital video formats, that is, it can support static *. PIC and *. JPG image format, dynamic *. MOV based on Indeo compression method and *. MPG video format based on MPEG compression method.
5. Let's introduce the streaming media formats that can be controlled remotely. Streaming media is what we often watch online. Rtsp and mms protocols are popular now. RTSP(Real Time Streaming Protocol) was proposed by RealNetworks and Netscape***, which mainly supports streaming media files. Rm and. Rmvb format. Represented by the streaming media server of Realnetworks, it is a bright spot of streaming media technology to provide different definition media streams of the same video screen according to different network bandwidths. However, with the increase of user bandwidth, this technology becomes less and less important, and it is replaced by MMS (Microsoft Media Server Protocol) proposed by Microsoft. Introduce two streaming media formats of MS: