College】 【weak popular video formats to explain】.

<br> <BR> *. MPEG / .MPG / .DAT MPEG is the abbreviation of Motion Picture Experts Group. .Such formats include MPEG-1, MPEG-2 and MPEG-4, including a variety of video formats. .MPEG-1 is believed to have the most contact with us, because now it is being widely used in the production of VCD and some video clips to download the network application above, most of the VCD format is compressed with MPEG1 (burning software automatically .MPEG1 conversion. DAT format), use MPEG-1 compression algorithm, you can put a 120-minute long film compressed to about 1.2 GB size. .MPEG-2 is used in DVD production, while the number of HDTV (high definition television) and a number of demanding video editing, processing the above there are a considerable number of applications. .Using the MPEG-2 compression algorithm compression of a 120-minute long film can be compressed to 5-8 GB in size (MPEG2 image quality MPEG-1 and its incomparable). .*. AVI AVI, Audio Video Interleaved (Audio Video Interleaved) abbreviation. .This AVI video format released by Microsoft in the video field has been in existence for a few years. .AVI format called convenience, image quality is good, but the drawback is the file size is too large *. RA / RM / RAM *. RM, Real Networks to develop the company's audio / video compression specification in a Real Media, Real Player can do .is the use of Internet resources for these technical specifications meet the Real Media audio / video live. .The Real Media file specification includes three types: RealAudio, Real Video and Real Flash (Real Networks and Macromedia, the company launch a new generation of high compression ratio animation format). .REAL VIDEO (RA, RAM) format from the start position is in terms of video streaming applications, it can be said that the originators of the video streaming technology. .It can dial with 56K MODEM conditions to achieve uninterrupted video playback, but its image quality than VCD or worse, if you looked at the RMcan compress the discs in stark contrast to out. .*. MOV Mac, used friends should have come in contact QuickTime. .Apple, QuickTime for Mac was originally a computer video image processing software. .Quick-Time offers two standard images and digital video formats, that can support static *. PIC and *. JPG image formats, dynamic compression method based Indeo *. MOV, and MPEG compression method based on the *. MPG video format .. .*. ASF ASF (Advanced Streaming format Advanced Streaming Format). .ASF is a MICROSOFT Real player in order, and now developed a competition can watch videos online file compression format. .ASF uses MPEG4 compression algorithm, compression ratio and image quality is very good. .Because ASF is an online real-time viewing of the video "streaming" format exists, so it's almost point image quality than VCD is not surprising, but higher than with a video "streaming" format better RAM format. .*. WMV encoding an independent real-time communication in the Internet standards for multimedia technology, Microsoft hopes to replace with its technical standards like QuickTime, and WAV, AVI file extensions like. .The main advantage of WMV: scalable media types, local or network playback, scalable media types, stream prioritization, multiple language support, scalability and so on. .*. AVI (n AVI) If you suddenly found out that the player can not open such a format, AVI files, then you should consider is not met n AVI. .n AVI is the acronym for New AVI, is an underground organization called Shadow Realm developed a new video format. .It is by the Microsoft ASF compression algorithm modified from the (not imagined AVI), video format is nothing more than the pursuit of compression ratio and image quality, so NAVI pursuit of this goal, the ASF format to improve the original number of deficiencies, .Let NAVI can have a higher frame rate. .It can be said, NAVI is to get rid of the improved flow characteristics of the video ASF format..Understanding video encoding video through the use of Hero's "to MPEG4" function, there is a "video settings" section, you may set out the above, the various video coding is not too clear, the following is a brief description of some code, I believe .select the appropriate encoding for your help to convert. .Common video encoding: <BR> 1, Microsoft RLE <BR> an 8-bit encoding, can only support 256 colors. .Compression of computer animation or images, synthetic material with a large area of color you can use it to code, is a lossless compression scheme. .2, Microsoft Video 1 <BR> used for analog video compression is a lossy compression scheme, the maximum reached only 256 colors, its quality can be imagined, the general not to use it to encode AVI. .3, Microsoft H.261 and H.263 Video Codec <BR> for video conferencing Codec, including H.261 for ISDN, DDN lines, H.263 for LAN, but most of this Codec is used on the machine .play, can not be used for encoding. .4, Intel Indeo Video R3.2 <BR> all of the Windows version can play AVI with Indeo video 3.2 code. .It is a large compression rate than Cinepak, but requires a computer than Cinepak playback fast. .5, Intel Indeo Video 4 and 5 are common both 4.5 and 5.10, the quality is better than Cinepak and R3.2, you can adapt to different bandwidth network, but there must be a corresponding decoder plug-ins will be downloaded to work smoothly for playback. .For Intel, MMX or above installed CPU machine, playback quality. .If you must use the words of AVI, recommended 5.10, the effect is almost the same situation, it has a faster encoding speeds and higher compression ratio. .6, Intel IYUV Codec obtained using this method excellent image quality, because this way the ordinary RGB color model into a more compact YUV color model. .If you want to compress into MPEG-1 AVI, then use it to get the effect is ideal, but it generated the file is too large 7, Microsoft MPEG-4 Video codec common are 1.0,2.0,3.0 three versions, of course, .is based on the MPEG-4 technology, which can not be used for 3.0 and AVI encoding, can only be used to generate support "video streaming" technology, ASF files. .8, DivX  - MPEG-4 Low-Motion/Fast-Motion actual and Microsoft MPEG-4 Video code is quite something, but Low-Motion uses a fixed rate, Fast-Motion uses a dynamic bit rate, the latter .AVI compressed into half the size of the former almost exclusively, but the quality should be worse. .Low-Motion for converting DVD to ensure better quality, Fast-Motion used to convert VCD to demonstrate the advantages of MPEG-4 short and pithy. .9, DivX 3.11/4.12/5.0 actually DivX, DivX is to break the original Microsoft's ASF specification developed, now transformed into Divxnetworks company development team, so has introduced a new version, the biggest feature is the process of coding .joined the 1-pass and 2-pass setting ,2-pass encoding is equivalent to two to maximize the network bandwidth and strike a balance between visual effects. .<BR>.