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VIDEO

VIDEO 

Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media

History


Video technology was first developed for mechanical television systems, which were quickly replaced by cathode ray tube (CRT) television systems, but several new technologies for video display devices have since been invented. Video was originally exclusively a live technology. Charles Ginsburg led an Ampex research team developing one of the first practical video tape recorder (VTR). In 1951 the first video tape recorder captured live images from television cameras by converting the camera's electrical impulses and saving the information onto magnetic video tape.

Video file format

From Wikipedia, the free encyclopedia
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A video file format is a type of file format for storing digital video data on a computer system. Video is almost always stored in compressed form to reduce the file size.
copy from wikipedia:-
NameFile extension(s)Container formatVideo coding format(s)Audio coding format(s)Notes
Matroska.mkvMatroskaAnyAny
Ogg Video.ogv, .oggOggTheora, DiracVorbis, FLAC
Dirac.drc?Dirac?
QuickTime File Format.mov, .qtQuickTimeMany[3]AAC, MP3, others[3]
Windows Media Video.wmvASFWindows Media Video, Windows Media Video Screen, Windows Media Video ImageWindows Media Audio, Sipro ACELP.net
Advanced Systems Format (ASF).asfASFanyany
MPEG-4 Part 14 (MP4).mp4, .m4p (with DRM), .m4vMPEG-4 Part 12H.264, MPEG-4 Part 2, MPEG-2, MPEG-1Advanced Audio Coding, MP3, others
MPEG-2 – Video.mpg, .mpeg, .m2v?H.262AAC, MP3, MPEG-2 Part 3, others
Material Exchange Format (MXF).mxfMXF??
3GPP.3gpMPEG-4 Part 12MPEG-4 Part 2, H.263, H.264AMR-NB, AMR-WB, AMR-WB+, AAC-LC, HE-AACv1 or Enhanced aacPlus (HE-AAC v2)Common video format for cell phones
3GPP2.3g2MPEG-4 Part 12MPEG-4 Part 2, H.263, H.264AMR-NB, AMR-WB, AMR-WB+, AAC-LC, HE-AACv1 or Enhanced aacPlus (HE-AAC v2), EVRC, SMVor VMR-WBCommon video format for cell phones
M4V – (file format for videos for iPods and PlayStation Portables developed by Apple).m4vMPEG-4 Part 12H.264AAC, Dolby DigitalDeveloped by Apple, used in iTunes. Very similar to MP4 format, but may optionally have DRM.
Flash Video (FLV).flv .f4v .f4p .f4a .f4bAudio, video, text, dataAdobe Flash PlatformSWF, F4V, ISO base media file formatDeveloped by the Adobe Flash Platform
Vob.vobVOBH.262/MPEG-2 Part 2 or MPEG-1 Part 2PCM, DTS, MPEG-1, Audio Layer II (MP2), or Dolby Digital (AC-3)Files in VOB format have .vob filename extension and are typically stored in the VIDEO_TS folder at the root of a DVD. The VOB format is based on the MPEG program stream format.
Nullsoft Streaming Video (NSV).nsvNSV??For streaming video content over the Internet
Multiple-image Network Graphics.mngN/AN/AnoneInefficient, not widely used.
RealMedia(RM).rmRealMediaRealVideoRealAudioMade for RealPlayer
RealMedia Variable Bitrate(RMVB).rmvbRealMedia Variable BitrateRealVideoRealAudioMade for RealPlayer
Video alternative to GIF.gifvHTMLAnynoneNot standardized, and not a real video file in the classical meaning since it merely references the real video file (e.g. a .webm file), which has to exist separately elsewhere. A .gifv "file" is simply a HTML webpage which includes a HTML5 video tag, where the video has no sound. As there were large communities online which create art using the medium of short soundless videos in GIF format, GIFV was created as a functionally similar replacement with vastly smaller filesizes than the inefficient GIF format.
MPEG-1.mpg, .mp2, .mpeg, .mpe, .mpvMPEG-1 part 1MPEG-1 part 2MPEG-1 Audio Layer I, MPEG-1 Audio Layer I, MPEG-1 Audio Layer III (MP3)Old, but very widely used due to installed base.
AMV video format.amvModified version of AVI[4]Variant of Motion JPEGVariant of IMA, ADPCMProprietary video file format produced for MP4 players and S1 MP3 players with video playback
F4V.flvMPEG-4 Part 12H.264MP3, AACReplacement for FLV.
WebM.webmMatroskaVP8, VP9Vorbis, OpusRoyalty-free format created for HTML5 video.
SVI.svi???Samsung video format for portable players
GIF.gifN/AN/AnoneSimple animation, inefficient compression, no sound, widely supported
Raw video format.yuvFurther documentation neededDoesn't applyDoesn't applySupports all resolutions, sampling structures, and frame rates
Flash Video(FLV).flvFLVVP6, Sorenson Spark, Screen video, Screen video 2, H.264MP3, ADPCM, Nellymoser, Speex, AACUse of the H.264 and AAC compression formats in the FLV file format has some limitations and authors of Flash Player strongly encourage everyone to embrace the new standard F4V file format[2] de facto standard for web-based streaming video (over RTMP).
ROQ.roq???used by Quake 3[5]
AVI.aviAVIanyanyUses RIFF

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