What are the common video formats of computers? Let's take a look! ASF ASF is an abbreviation of Advanced Streaming format. The meaning of this format should be seen by the literal (advanced stream format). To put it bluntly, ASF is a file compression format that MICROSOFT has developed to compete with the current Real player to watch video programs directly on the Internet! Since it uses the compression algorithm of MPEG4, the compression ratio and image quality are very good. Because ASF is a video that can be viewed on the Internet in a "stream" format, its image quality is a little bit worse than VCD, but it is not surprising, but it is the same as the video "stream" format RAM format. It’s better. However, if you don't consider spreading it online, choose the best quality to compress the file, it is not surprising that the generated video file is better than VCD (MPEG1), but in this case, it loses the original intention of ASF. It is better to simply use N AVI or DIVX. But Microsoft's "child" has its own unique advantages, the most obvious is that all kinds of software support it is no match. n AVI n AVI is short for newAVI and is a new video format developed by an underground organization called ShadowRealm. It is modified by the Microsoft ASF compression algorithm (not the imaginary AVI). The video format pursues nothing more than compression ratio and image quality, so NAVI has improved some of the shortcomings of the original ASF format in pursuit of this goal. Let NAVI have a higher frame rate. Of course, this comes at the expense of ASF's video streaming features. In a nutshell, NAVI is an improved ASF format that removes video streaming features! The simplest point is --- non-network version of ASF! AVI AVI is an abbreviation of Audio Video Interleave, which does not seem to explain me much. The old video format that Microsoft released from the WIN3.1 era has been serving us for several years. If you don't know this, I don't think you can look down. The benefits of this thing are nothing more than compatibility, easy to call, and good image quality, but I think it is well known: the size is big! Because of this, we can now see the introduction of MPEG4 from the birth of MPEG1. MPEG MPEG is short for Motion Picture Experts Group, which includes MPEG-1, MPEG-2 and MPEG-4 (note that there is no MPEG-3, and the familiar MP3 is just MPEG Layeur 3). MPEG-1 is believed to be the most popular, because it is widely used in VCD production and some video clip download network applications. It can be said that 99% of VCDs are compressed in MPEG1 format (note VCD2. 0 does not mean that VCD is compressed with MPEG-2. Using MPEG-1 compression algorithm, you can compress a 120-minute movie (not video file) to about 1.2 GB. MPEG-2 is applied to the production (compression) of DVDs, and it also has considerable application in some HDTV (High Definition Television Broadcasting) and some high-demand video editing and processing. Using MPEG-2 compression algorithm to compress a 120-minute movie (not video file) can be compressed to a size of 4 to 8 GB (of course, its image quality and other performance indicators MPEG-1 is not comparable ). MPEG-4 is a new compression algorithm that uses the ASF format of this algorithm to compress a 120-minute movie (not a video file) into a stream of around 300M for viewing on the web. Other DIVX formats can be compressed to around 600M, but the image quality is much better than ASF. DIVX DIVX video encoding technology can be said to be a new video compression format threatening DVD (some people say it is a DVD killer), it is modified by Microsoft mpeg4v3, using MPEG4 compression algorithm. At the same time, it can be said that it was developed to break the various agreements of ASF. The use of this encoding technology, which is said to be banned in the United States --- MPEG4 compression of a DVD requires only 2 CDROMs! This means that you don't need to buy a DVD ROM to get the same video quality as it is, and all you need is a CDROM! Moreover, playing this code, the requirements of the machine are not high, the CPU is only 300MHZ or more (regardless of your PII, CELERON, PIII, AMDK6/2, AMDK6III, AMDATHALON, CYRIXx86) with 64 megabytes of memory and an 8 megabytes of video memory. The graphics card can be played smoothly. This is definitely an amazing technology, the future is limitless! QuickTime QuickTime (MOV) is a video format created by Apple Inc., which has existed only on Apple's MAC machines for a long time. Later, it developed to support the WINDOWS platform, but to be fair, it is an excellent video encoding format whether it is broadcast locally or as a video stream format. So far, it has 4 versions, of which the 4.0 version has the best compression ratio! REAL VIDEO REAL VIDEO (RA, RAM) format from the beginning is positioning in the video streaming application, can also be said to be the initiator of video streaming technology. It can realize uninterrupted video playback under the condition of dial-up Internet access with 56K MODEM. Of course, its image quality and MPEG2, DIVX and so on are not flattering. After all, to achieve uninterrupted video transmission over the Internet requires a lot of bandwidth, ASF's powerful competitors in this regard! However, with the advent of RMVB, this situation will change. VB in RMVB refers to VBR, which is the abbreviation of Variable Bit Rate. The Chinese meaning is variable bit rate. RMVB breaks the average bit rate of compression and reduces the bit rate under static pictures to optimize the bit rate, efficiency and resource saving in the whole movie. Generally speaking, a 700MB DVDrip uses an average bit rate of 450Kbps. The compression ratio, the generated RMVB size is only 400MB, but the picture quality does not change much. The technology can be applied as early as MP3, and now with the launch of Real's Helix Producer 9, it is also applied to the video field.