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AviSynth is a frameserver program for Microsoft Windows developed by Ben Rudiak-Gould, Edwin van Eggelen, Klaus Post, Richard Berg, Ian Brabham and others. It is free software under GNU GPL license. == Scripting video editor == AviSynth acts as a non-linear video editor controlled entirely by scripting (without a GUI). It stands as an intermediary between a digital video source, like an AVI or MPEG file, and a VFW receiving program, which is typically a media player, video editing software, or an encoder. AviSynth communicates with any program that supports AVIs through the Video for Windows system by acting as a "fake" AVI file. It can apply a large variety of editing and processing functions (called filters) to a video stream before passing along the results as if it were a legitimate file being read. Filter capabilities include trimming, cropping, deinterlacing, inverse telecine, loading and splicing still images, doing color corrections, denoising, and many other things. Technically, it acts as a codec for ''AviSynth scripts'', which represent edit decision lists in the form of text files written in the (AviSynth scripting language ). The scripting language can be extended through the use of external plugins (as opposed to internal plugins, which are included with AviSynth itself). An external plugin list is maintained at (AviSynth Filter Collection ). AviSynth filters work in several color spaces including RGB, YUY2 and YV12 (Also YV16, YV24, YV411 and Y8 in Avisynth 2.6). This is necessary to allow all kinds of video input and output. Certain functions only work on specific color spaces, requiring conversion beforehand. For example, say the script "myAvi.avs" (just a plain text-file saved with the extension "avs") contains the following: AviSource("myAvi.avi") Crop(0, 0, 320, 240) Blur(0.1) This script file can be opened in most media players (such as Windows Media Player). The program will play the video file "myAvi.avi" cropped down to its top-left 320 pixels by 240 pixels and blurred by a small amount. Operations occur in sequential order, so the cropping occurs first, then the blurring. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「AviSynth」の詳細全文を読む スポンサード リンク
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