» AviSynth is a powerful video FrameServer for Win32.
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| AviSource | Opens an AVI file. | RGB24, RGB32, YUY2, YV12 |
| OpenDMLSource | Opens an AVI file. | RGB24, RGB32, YUY2, YV12 |
| AviFileSource | Opens an AVI file. | RGB24, RGB32, YUY2, YV12 |
| WavSource | Opens a WAV file or the audio of an AVI file | RGB24, RGB32, YUY2, YV12 |
| DirectShowSource | Opens a filename using DirectShow. | RGB24, RGB32, YUY2, YV12 |
| SegmentedAviSource / SegmentedDirectShowSource | This filter automatically loads up to 100 avi files per argument. | RGB24, RGB32, YUY2, YV12 |
| BlankClip / Blackness | This filter produces a solid color, silent video clip of the specified length (in frames). | RGB24, RGB32, YUY2, YV12 |
| IPCSource | Opens a communication channel with an AviSynth-compatible frame server running in another process. | RGB24, RGB32, YUY2 |
| ImageReader / ImageSource | This filter produces a video clip by reading in still images. | RGB24, RGB32, YUY2, YV12 |
| Import | Imports an AviSynth script into the current script | RGB24, RGB32, YUY2, YV12 |
Filters for image processing
| AddBorders | Adds black borders around the image. | RGB24, RGB32, YUY2, YV12 |
| Blur / Sharpen | This a simple 3x3-kernel blurring/sharpening filter. | RGB24, RGB32, YUY2, YV12 |
| ColorYUV | Adjusts colors and luma independently. | YUY2, YV12 |
| ConvertBackToYUY2 | Converts a RGB clip back to YUY2. | RGB24, RGB32, YUY2 |
| ConvertToRGB | Converts to RGB32 unless clip is RGB24. | RGB24, RGB32, YUY2, YV12 |
| ConvertToRGB24 / ConvertToRGB32 / ConvertToYUY2 / ConvertToYV12 | Converts to RGB24/RGB32/YUY2/YV12. | RGB24, RGB32, YUY2, YV12 |
| Crop | Crops excess pixels off of each frame. | RGB24, RGB32, YUY2, YV12 |
| CropBottom | Crops excess pixels off of the bottom of each frame. | RGB24, RGB32, YUY2, YV12 |
| GeneralConvolution | General convolution. | RGB32 |
| GreyScale | Converts a video to greyscale. | RGB24, RGB32, YUY2, YV12 |
| HSIAdjust (removed in v2.53) | Adjusts hue, saturation, intensity and alpha level. | YUY2, YV12 ? |
| Invert | Inverts the color channels of a video. | RGB24, RGB32, YUY2, YV12 |
| Layer | Layering two videos. | RGB32, YUY2 |
| Mask | Applies an alpha-mask to a clip. | RGB32 |
| ResetMask | Applies an "all-opaque" alpha-mask to clip. | RGB32 |
| ColorKeyMask | Sets the alpha-channel (similar as Mask does) but generates it by comparing the color. | RGB32 |
| Letterbox | Letterbox simply blackens out the top and the bottom and optionally left and right side of each frame. | RGB24, RGB32, YUY2, YV12 |
| Levels | Adjusts brightness, contrast, and gamma level. | RGB24, RGB32, YUY2, YV12 |
| Limiter | A filter for clipping levels to within CCIR-601 range. | YUY2, YV12 |
| MergeChroma / MergeLuma | This filter makes it possible to merge chroma/luma from a videoclip into another. There is an optional weighing, so a percentage between the two clips can be specified. | YUY2, YV12 |
| Overlay | Overlay puts two clips on top of eachother with an optional displacement of the overlaying image, and using different overlay methods. Furthermore opacity can be adjusted for the overlay clip. | RGB24, RGB32, YUY2, YV12 |
| ReduceBy2 | Reduces the size of each frame by half. | RGB24, RGB32, YUY2, YV12 |
| HorizontalReduceBy2 / VerticalReduceBy2 | Reduces the size of each frame by half horizontally/vertically. | RGB24, RGB32, YUY2, YV12 |
| RGBAdjust | Adjusts each color channel seperately. | RGB24, RGB32, YUY2 |
| BicubicResize / BilinearResize / LanczosResize / Lanczos4Resize / PointResize | The resize filters rescale the input video frames to an arbitrary new resolution, using different sampling algorithms. | RGB24, RGB32, YUY2, YV12 |
| SpatialSoften / TemporalSoften | Removes noise from a video clip by selectively blending pixels spatially/temporally. | YUY2, YV12 (only TemporalSoften) |
| ShowAlpha | Shows the alpha channel of a clip. | RGB32 |
| SwapUV | Swaps chroma channels. | YUY2, YV12 |
| UToY / VToY | Copies chroma U/V plane to Y plane (image is now half as big) | YUY2, YV12 |
| YToUV | Puts the luma channels of the two clips as U and V channels. Image is now twice as big, and luma is 50% grey. Use MergeLuma, if you want to add luma values. | YUY2, YV12 |
| Tweak | Adjusts the hue, saturation, brightness, and contrast. | YUY2, YV12 |
Filters for Editing
| AlignedSplice / UnalignedSplice | Joins two or more video clips end to end. | RGB24, RGB32, YUY2, YV12 |
| AssumeFPS / ChangeFPS / ConvertFPS | Changes framerates in different ways. | RGB24, RGB32, YUY2, YV12 |
| DeleteFrame | Deletes a single frame, given as an argument. | RGB24, RGB32, YUY2, YV12 |
| Dissolve | Like AlignedSplice, except that the clips are combined with some overlap. | RGB24, RGB32, YUY2, YV12 |
| DuplicateFrame | Duplicates a single frame given as an argument. | RGB24, RGB32, YUY2, YV12 |
| FadeIn0 / FadeIn / FadeIn2 / FadeOut0 / FadeOut / FadeOut2 / FadeIO0 / FadeIO / FadeIO2 | Causes the video stream to fade linearly to black at the start or end. | RGB24, RGB32, YUY2, YV12 |
| FreezeFrame | Replaces all the frames between first-frame and last-frame. | RGB24, RGB32, YUY2, YV12 |
| Loop | Loops the segment from start frame to end frame a given number of times. | RGB24, RGB32, YUY2, YV12 |
| SelectEven / SelectOdd | Makes an output video stream using only the even/odd numbered frames. | RGB24, RGB32, YUY2, YV12 |
| SelectEvery | Selects frames with a fixed period, it is a generalization of SelectEven and SelectOdd. | RGB24, RGB32, YUY2, YV12 |
| SelectRangeEvery | Selects a range of frames with a fixed period. | RGB24, RGB32, YUY2, YV12 |
| Trim | Trims a video clip so that it includes only the frames first-frame through last-frame. | RGB24, RGB32, YUY2, YV12 |
Filters for treating interlaced video
Currently (v2.5x and older versions), AviSynth has no interlaced flag which can be used for interlaced video. There is a fieldbased flag, but contrary to what you might expect, this flag is not related to interlaced video. In fact, all video (progressive or interlaced) is framebased, unless you use AviSynth filters to change that. There are two filters who turn framebased video into fieldbased video: SeparateFields and AssumeFieldBased. More information about fieldbased video can be found here.
| AssumeFrameBased / AssumeFieldBased | AviSynth keeps track of whether a given clip is field-based or frame-based ... | RGB24, RGB32, YUY2, YV12 |
| AssumeBFF / AssumeTFF | Force field order. | RGB24, RGB32, YUY2, YV12 |
| Bob | Bob takes a clip and bob-deinterlaces it. | RGB24, RGB32, YUY2, YV12 |
| ComplementParity | Changes top fields to bottom fields and vice-versa. | RGB24, RGB32, YUY2, YV12 |
| DoubleWeave | If the input clip is field-based, this filter operates like Weave, except that it produces double the number of frames. | RGB24, RGB32, YUY2, YV12 |
| Interleave | Interleaves frames from several clips on a frame-by-frame basis. | RGB24, RGB32, YUY2, YV12 |
| Pulldown | This filter simply selects two out of every five frames of the source video. | RGB24, RGB32, YUY2, YV12 |
| SeparateFields | Takes a frame-based clip and splits each frame into its component fields. | RGB24, RGB32, YUY2, YV12 |
| SwapFields | Swaps the two fields in an interlaced frame. | RGB24, RGB32, YUY2, YV12 |
| Weave | Takes pairs of fields from the input video clip and combines them together to produce interlaced frames. | RGB24, RGB32, YUY2, YV12 |
Audio filters
Prior to v2.5 the audio samples are converted to 16 bits when using one of these audio filters. Starting from v2.5 the audio samples will be automatically converted if any filters requires a special type of sample. This means that most filters will accept several types of input, but if a filter doesn't support the type of sample it is given, it will automatically convert the samples to something it supports. The internal formats supported in each filter is listed in the colorspace column. A specific sample type can be forced by using the ConvertAudio functions.
If the sample type is float, when AviSynth has to output the data, it will be converted to 16 bit, since float cannot be passed as valid AVI data.
| Amplify / AmplifydB | Amplify multiply audio samples by amount. | 16Bit, Float |
| AssumeSampleRate | Adjusts the playback speed of the audio. | All |
| AudioDub | Takes the video stream from the first argument and the audio stream from the second argument and combines them. | All |
| ConvertAudioTo8bit / ConvertAudioTo16bit / ConvertAudioTo24bit / ConvertAudioTo32bit / ConvertAudioToFloat | Converts audio samples to 8/16/24/32/Float bits. | All |
| ConvertToMono | Merges all audio channels. | 16Bit, Float |
| DelayAudio | Delays the audio track by second seconds. | All |
| EnsureVBRMP3Sync | Corrects out-of-sync mp3-AVI's, when seeking or trimming. | All |
| GetChannel | Returns an audio channel from a clip. | All |
| GetLeftChannel / GetRightChannel | Returns the left/right audio channel from a clip. | All |
| KillAudio | Removes the audio from a clip completely. | All |
| LowPassAudio / HighPassAudio (removed in v2.52) | Filters out frequencies below/above the given frequency. | N/A |
| MergeChannels | Merges channels of two audio clips. | All |
| MixAudio | Mixes audio from two clips. | 16Bit, Float |
| MonoToStereo | Converts two mono signals to one stereo signal. | 16Bit, Float |
| Normalize | Amplifies the entire waveform as much as possible, without clipping. | 16Bit, Float |
| ResampleAudio | Performs a high-quality change of audio sample rate. | 16Bit |
| SuperEQ | High quality 16 band sound equalizer. | Float |
| SSRC | Very high quality samplerate conversion. | Float |
| TimeStretch | This filter can change speed of the sound without changing the pitch, and change the pitch of a sound without changing the length of a sound | Float |
| Tone | This will generate sound. | Float |
Special and exotic filters
| Animate / ApplyRange | Animate (ApplyRange) is a meta-filter which evaluates its parameter filter with continuously varying (the same) arguments. | RGB24, RGB32, YUY2, YV12 |
| ConditionalFilter / FrameEvaluate / ScriptClip / ConditionalReader | ConditionalFilter returns source1 if some condition is met, otherwise it returns source2. ScriptClip returns the clip which is returned by the function evaluated on every frame. | YV12 |
| FixBrokenChromaUpsampling | The MS DV codec upsamples the chroma channels incorrectly, this filter compensates for it. | YUY2 |
| FixLuminance | Correct shifting vertical luma offset. | YUY2 |
| FlipHorizontal / FlipVertical | Flips the video from left to right/upside-down. | RGB24, RGB32, YUY2, YV12 |
| ImageWriter | Writes frames as images to your hard disk. | RGB24, RGB32, YUY2, YV12 |
| PeculiarBlend | This filter blends each frame with the following frame in a peculiar way. | YUY2 |
| Reverse | This filter makes a clip play in reverse. | RGB24, RGB32, YUY2, YV12 |
| Subtitle | Adds a single line of anti-aliased text to a range of frames. | RGB24, RGB32, YUY2, YV12 |
| TCPServer | This filter will enable you to send clips over your network. You can connect several clients to the same machine. | All available |
| TCPSource | This filter will enable you to send clips over your network. You can connect several clients to the same machine. | All available |
| TurnLeft / TurnRight | Rotates the clip 90 degrees counterclock wise / 90 degrees clock wise. | RGB24, RGB32, YUY2, YV12 |
| WriteFile / WriteFileIf / WriteFileStart / WriteFileEnd | Output to a textfile | RGB24, RGB32, YUY2, YV12 |
Debug filters
| ColorBars | This filter produces a video clip containing SMPTE color bars scaled to any image size. | RGB32, YUY2, YV12 |
| Compare | Compares two clips and prints out information about the differences. | RGB24, RGB32, YUY2 |
| Histogram | Adds a histogram. | YUY2, YV12 |
| Info | Prints out image and sound information. | RGB24, RGB32, YUY2, YV12 |
| MessageClip | Produces a clip containing a text message. | RGB32 |
| ShowFiveVersions | Takes five video streams and combines them in a staggered arrangement from left to right. | RGB24, RGB32, YUY2, YV12 |
| ShowFrameNumber / ShowSMPTE | Draws text on every frame indicating what number AviSynth thinks it is. | RGB24, RGB32, YUY2, YV12 |
| StackHorizontal / StackVertical | Takes two or more video clips and displays them together in left-to-right/up-to-down order. | RGB24, RGB32, YUY2, YV12 |
| Subtract | Produces an output clip in which every pixel is set according to the difference between the corresponding pixels. | RGB24, RGB32, YUY2, YV12 |
| Version | Generates a video clip with a short version and copyright statement. | RGB24 |