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These functions are useful to help understand the syntax of Avisynth scripting. Of course, they are even more useful to actually use. Copy them into a file named *.avsi, put them in your plugin directory, and they will be automatically enabled.
Layer Loop
LayerLoop is a function Dividee made upon the release of Avisynth 2 to show off the new Layer and Loop commands.
60 fps deinterlacer
We've asked Tom to include a proper 60fps deinterlacer in his wonderful TomsMoComp, but until then you'll have to make do with TomsBob.
Virtual Dub filters
Wilbert's collections of functions for using VirtualDub filters: VirtualDub_I and VirtualDub_II, along with a SimpleVDubFilters to help interface with them.
Format convertion
Useful SmoothDeinterlaceFunctions to convert between broadcast formats. Converts back and forth between NTSC /P PAL.
Multiple sources
Some common EditingFunctions for inserting and splicing multiple video sources.
IVTCBlend
Waka demonstrated an IvtcBlend function that uses the information in the "extra" fields of a telecined source to help combat temporal noise.
Two scripts that will help you see if your clip is Top-Field-First or Bottom-Field-First.
A script which checks the parity of your clip.
Smoothing interlaced video
A basic script on how to safely process interlaced video with spatial and temporal filters. InterlacedSmoothing.
A script to help find lip sync DelayAudio value
A FindAudioSyncScript by IanB to help you find the appropriate audio delays, if you have desync'ed audio.
Add audio for CCE 2.50 instead of ResampleAudio
An AddAudio function that adds silent audio to a clip. Very useful for CCE 2.50 users.
Resize based on bits/(pixel*framerate) formula (bpp)
It respects AR as possible mantaining MOD32 resolutions,uses bitrate, bpp and the resize function specified as parameters.
Usage:
ResizeARC(860, 0.2, "!FastBilinearResize")
Compressibility test
Usage: CompTest(5) for a compressibility test on 5% of the movie.
A filter for removing the dreaded "bug" from broadcast sources.
Usage:
clip.dekafka(masklogo,582,36,59,27,255)
A filter for removing rainbows (requires AviSynth v2.5).
Usage:
Import("mfRainbow-0.1.avs")
AVISource("file.avi")
mfRainbow()
A filter for darkening cartoon edges (requires AviSynth v2.5).
Usage:
Import("mfToon-0.32.avs")
AVISource("file.avi")
mfToon()
A simple filter combination that helps in moving chroma back, if it has been displaced.
Helps you to find the right position to concatenate 2 Videostreams.
i.E. if you have, like me, found a video as two 800MB mpeg that won't fit on standard CDs, and on the second CD,
a piece of the last frames of the first CD is included.
Makes a movie look like seen through a kaleidoscope. Uses functions like layer, bilinearresize and rand.
Not really useful, but shows again how flexible avisynth is.
Just makes the difference visible between an encoded and an original videoclip. So you can see what you really "lose" when encoding a video.
Like FreezeFrame, but blends all frames inside the start-end range together to create a smooth result
Add a vertically scrolling title (bottom to top, horizontally centered).
Allows one to use 2.0x and 2.5x plugins seamlessly without any calls to LoadPlugin.
A variety of functions, including Trim2/Trim3, UnfoldFieldsVertical/FoldFieldsVertical, NoArgFunctionWrapper, and Wipe.Examples of wrapper functions to set default values to filters or to create presets for them.
convert60ito24p
[convert60ito24p] converts a 60fps interlaced NTSC Video into a 24fps progressive Video using different blending technics.
Converts DVB (Digital Video Broadcasting) MPEG-2 files into RGB24 720px-width video, with an option to return a centre cut-out of a 16:9 frame.
((red shifter (3d anaglyph?)))
this script shifts the red channel up and to the left an arbitrary amount of pixels
Field based speed changing
AlterFPS can be used to speed up or slow down a video by adding or removing fields. It works like the 3:2 pulldown of NTSC film material, except you can choose your new speed. It can also blend frames for progressive frame results, and blend fields like ConvertFPS?.
Restore24
[Restore24] is a AviSynth-Function created by Did?e, that is able to do the nearly impossible: Restore 24fps FILM out of a fieldblended
FILM -> Telecine -> NTSC -> Blendconversion -> PAL - Video.
[LimitedSharpen] can be used like a traditional sharpener, but producing much less artefacts. It can be used as a replacement for the common "resize(x4)-XSharpen-resize(x1)" combo, with very similar results (perhaps even better) - but at least 2 times faster, since it requires much less oversampling.
[YLevels] is a set of filters to replace Levels using MaskTools?. It lets you choose different gamma curves, e.g. to boost dark areas without washing out bright ones. Unlike Levels it does not clip values outside the given range; it also uses named/optional parameters, negating the need for wrappers.
Multiple clip comparison
BoxCompare will let you compare up to 4 clips with simple annotations. It's basically a wrapper for StackHorizontal/StackVertical.
Restores 24fps FILM out of a fieldblended FILM -> Telecine -> NTSC -> Blendconversion -> PAL - Video (alternative for Restore24).
It removes rainbows on the clip, without any visible quality loss.
It gives VERY similar results to !blindPP(quant=x,cpu=4) but can eliminate some bitrate pumping effects as well, an delivers a not-insignificant compressibility gain (not as much as removedirt, but hey, we can't all be geniuses).
mvfps-like functions
mvfpsflowscd, mvfpsscd, MVFlowBlur?:
http://forum.doom9.org/showthread.php?t=105015
http://forum.doom9.org/showthread.php?t=102071
A free collection of 160+ functions -all coded in Avisynth script- installable as a single package, which both adds syntactic sugar to Avisynth script language and serves as an educational example of Avisynth script coding from the elementary up to advanced level. In particular, the implementation of arrays (every Avisynth script's variable type is supported) provides a powerful general-purpose tool to script writers.
Here is an example of many-times-nested animate functions resulting the possibility for very nice effects.
A paramiter compatable Subtitle function which allows the usage of line breaks.
Moves field 0 or 1 pixelwise.
Tints the image toward a specified colour.
AddHalos?
Adds glowing halos to bright objects in a clip. Requires Donald Graft's BoxBlur? plugin.
(Diffusion)?
Adds a softening diffusion to a clip. Requires Donald Graft's BoxBlur? plugin.
Functions to zoom in some frames of a clip, with optional linear zoom-in/out. Can be used to remove banners, etc. from TV recordings that can't be removed by a delogo plugin.
Allows to synchronize your video camera and your projector purely by software(!) - provided you can slow down the projector to about 2/3 to 1/2 of the camera's frame rate.
Resizes and crops the red/green/blue channel of the image. Thus eliminates the colored edges next to the image corners that result from lenses with chromatic aberration.
Add more here whenever you come across a cool/useful bit of code.