【 Weak current College 】 popular video format full commentary---Power By 【 China power house network 】

ASF

ASF is an abbreviation from AdvancedStreamingformat literally (advanced streaming format) means should see the usefulness of this format. To put it bluntly ASF is MICROSOFT to and present Realplayer competition and developed in a way you can directly watch the video online file compression format! since it uses the MPEG4 compression algorithm, so the compression rate and the image quality is very good. Since the ASF is to an Internet instant viewing of video "flow" format, so it's image quality than VCD is not surprisingly poor a little, but higher than the same video format "flow" of RAM format. However if you are not taken into account in the Internet, selected the best quality to compress the file, the resulting video file than to VCD (MPEG1) good is not strange, but in this case, lose the original intention of ASF originally, it is better to simply use the NAVI or DIVX. But Microsoft's "child," is to have its unique advantages, the most obvious are the various types of software support is nobody's business.

nAVI

NAVI is an abbreviation that is newAVI named ShadowRealm underground organization developed a new video format. It is a compression algorithm by MicrosoftASF modifications to (and not imagine AVI) video formats in pursuit of just compression and image quality, so in order to pursue this goal NAVI, improved the original number of ASF format, let NAVI can have a higher frame rate (framerate). Of course, this is at the expense of ASF video stream characteristics as price. Generally speaking, NAVI is a way to remove the video flow characteristics of improved ASF format! then simple point is---non-network version of the ASF!

AVI

AVI is the abbreviation for the AudioVideoInterleave appears needless explains that Microsoft published by WIN3.1 times of old video format for our services for several years. If this is not know, I see you still don't look down, and the benefits of this thing, well, just good, call easily compatible, image quality is good, but the drawback I think it is well known: the size is big! because this point, we now can see the birth of the MPEG1 to MPEG4 for now.

MPEG

MPEG is MotionPictureExpertsGroup abbreviation, it includes MPEG-1, MPEG-2 and MPEG-4 (note that no MPEG-3, familiar MPEGLayeur3 MP3 only). MPEG-1 believe is that we come into contact with most of the time, because it is widely used in the manufacture of VCD and some video clips download network application above, we can say that 99% of VCD MPEG1 format is used, the compression was (note the VCD2.0 and not the description is used MPEG VCD) use MPEG-1 compression algorithm, you can put a 120 minute long film (not video files) to about size. 1.2GB MPEG-2 is used in the making of the DVD (compression), while in some HDTV (high definition TV broadcasting) and some demanding video editing, processing, it also has considerable application surface. Using MPEG-2 compression algorithm to compress a 120 minute long film (not video files) can compress to a 4 to a 8 GB size (of course, its image quality, and other performance indicators MPEG-1 is no better than that). MPEG-4 is a new compression algorithm, using this algorithm of the ASF format can put a 120 minute long film (not video files) to about streaming video 300M, available for online viewing. Other DIVX format can also be compressed to about 600M, but its image quality is much better than the ASF.

DIVX

DIVX video encoding technology can be said to be a threat to the DVD of the video compression format (some say it is DVD killer), modified by Microsoftmpeg4v3, use MPEG4 compression algorithm. At the same time it is to break the various agreements and ASF. While this is said to be United States prohibits the export of encoding technology---MPEG4 compression of a DVD only need 2 CDROM! this means that you do not need to buy a DVDROM or you can get and it almost video quality, but it requires you have a CDROM! Besides playing this kind of encoding, the machine is not high, the CPU is mhzs (regardless of whether you are a PII, CELERON, PIII, AMDK6/2, AMDK6III, AMDATHALON, CYRIXx86) with 64 MB of memory and an 8 MB memory card can smooth playback. This is a great technology, the future is not limited!

QuickTime

QuickTime (MOV), Apple (Apple) company was founded in a video format, in a long time, it is only in Apple's MAC machine exists. Later development to support the WINDOWS platforms, but to be fair, it either in the local playback or as video stream format in the Internet, is an excellent video encoding format. So far, it has a total of four versions, with 4.0 version compression rates the best!

REALVIDEO

REALVIDEO (RA or RAM) format from the outset is positioned in the video streaming applications, can be regarded as a pioneer of video streaming technology. It can use 56KMODEM dial-upInternet access conditions for uninterrupted video playback, of course, its image quality and MPEG2, DIVX, etc. than is afraid to flattered in now. After all, you want to achieve in online transmission of uninterrupted video requires a lot of bandwidth, the ASF in its powerful competitors!