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Fade - Avisynth wiki
http://avisynth.nl/index.php/Fade
Source clip; all AviSynth color formats accepted. int num_frames = Fade duration. int ... Provides a reference for num_frames in audio only clips. It is ignored if a video stream is present. Set fps =AudioRate if sample exact audio positioning is required. Notes . FadeOut ...
Using avisynth to fade out the audio - VideoHelp Forum
https://forum.videohelp.com/threads/383792-Using-avisynth-to-fade-out-the-audio
They're mainly for audio, but you can fade video only, audio-only, or both. Fade to black or any other color. Script is here (dropbox) Linear (the normal Avisynth fade): Exponential (fast at first, then a long fadeout): Studio (slow, medium, slow): Logrithmic (slow, fast): EDIT - …
Fade Avisynth Filter
http://avisynth.org.ru/docs/english/corefilters/fade.htm
FadeIn0/ FadeOut0do not include the extra frame. is useful when processing Audio only clips or chaining two or more fades to get a square law or a cube law fading effects. e.g Clip.FadeOut0(60).FadeOut0(60).FadeOut(60) gives a much sharper attack and gentler tailoff. The 50% point is at frame 12 of the fade, at frame 30 the fade
Fade - AviSynth
https://avisynth.sinsixx.com/Fade.html
FadeIO and FadeIO2 are a combination of their respective FadeIn and FadeOut functions. The sound track (if present) also fades linearly to or from silence. The fading affects only the last num_frames frames of the video. The last frame of the video becomes almost-but-not-quite black (or the specified color).
Dissolve - Avisynth wiki
http://avisynth.nl/index.php/Dissolve
Dissolve(clip clip1, clip clip2 [,...], int overlap [, float fps]). Dissolve is like AlignedSplice, except that the clips are combined with some overlap.The last overlap frames of the first video stream are blended progressively with the first overlap frames of the second video stream so that the streams fade into each other. The audio streams are blended similarly.
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