Filters:
  T.. = Timeline support
  .S. = Slice threading
  A = Audio input/output
  V = Video input/output
  N = Dynamic number and/or type of input/output
  | = Source or sink filter
 TS aap               AA->A      Apply Affine Projection algorithm to first audio stream.
 .. abench            A->A       Benchmark part of a filtergraph.
 .. acompressor       A->A       Audio compressor.
 .. acontrast         A->A       Simple audio dynamic range compression/expansion filter.
 .. acopy             A->A       Copy the input audio unchanged to the output.
 .. acue              A->A       Delay filtering to match a cue.
 .. acrossfade        AA->A      Cross fade two input audio streams.
 .S acrossover        A->N       Split audio into per-bands streams.
 T. acrusher          A->A       Reduce audio bit resolution.
 TS adeclick          A->A       Remove impulsive noise from input audio.
 TS adeclip           A->A       Remove clipping from input audio.
 TS adecorrelate      A->A       Apply decorrelation to input audio.
 T. adelay            A->A       Delay one or more audio channels.
 TS adenorm           A->A       Remedy denormals by adding extremely low-level noise.
 T. aderivative       A->A       Compute derivative of input audio.
 TS adrc              A->A       Audio Spectral Dynamic Range Controller.
 TS adynamicequalizer A->A       Apply Dynamic Equalization of input audio.
 T. adynamicsmooth    A->A       Apply Dynamic Smoothing of input audio.
 .. aecho             A->A       Add echoing to the audio.
 TS aemphasis         A->A       Audio emphasis.
 T. aeval             A->A       Filter audio signal according to a specified expression.
 T. aexciter          A->A       Enhance high frequency part of audio.
 T. afade             A->A       Fade in/out input audio.
 TS afftdn            A->A       Denoise audio samples using FFT.
 TS afftfilt          A->A       Apply arbitrary expressions to samples in frequency domain.
 TS afir              N->A       Apply Finite Impulse Response filter with supplied coefficients in additional stream(s).
 .. aformat           A->A       Convert the input audio to one of the specified formats.
 TS afreqshift        A->A       Apply frequency shifting to input audio.
 TS afwtdn            A->A       Denoise audio stream using Wavelets.
 T. agate             A->A       Audio gate.
 .S aiir              A->N       Apply Infinite Impulse Response filter with supplied coefficients.
 T. aintegral         A->A       Compute integral of input audio.
 .. ainterleave       N->A       Temporally interleave audio inputs.
 T. alatency          A->A       Report audio filtering latency.
 T. alimiter          A->A       Audio lookahead limiter.
 TS allpass           A->A       Apply a two-pole all-pass filter.
 .. aloop             A->A       Loop audio samples.
 .. amerge            N->A       Merge two or more audio streams into a single multi-channel stream.
 T. ametadata         A->A       Manipulate audio frame metadata.
 .. amix              N->A       Audio mixing.
 .. amultiply         AA->A      Multiply two audio streams.
 TS anequalizer       A->N       Apply high-order audio parametric multi band equalizer.
 TS anlmdn            A->A       Reduce broadband noise from stream using Non-Local Means.
 TS anlmf             AA->A      Apply Normalized Least-Mean-Fourth algorithm to first audio stream.
 TS anlms             AA->A      Apply Normalized Least-Mean-Squares algorithm to first audio stream.
 .. anull             A->A       Pass the source unchanged to the output.
 T. apad              A->A       Pad audio with silence.
 T. aperms            A->A       Set permissions for the output audio frame.
 .. aphaser           A->A       Add a phasing effect to the audio.
 TS aphaseshift       A->A       Apply phase shifting to input audio.
 TS apsnr             AA->A      Measure Audio Peak Signal-to-Noise Ratio.
 TS apsyclip          A->A       Audio Psychoacoustic Clipper.
 .. apulsator         A->A       Audio pulsator.
 .. arealtime         A->A       Slow down filtering to match realtime.
 .. aresample         A->A       Resample audio data.
 .. areverse          A->A       Reverse an audio clip.
 TS arls              AA->A      Apply Recursive Least Squares algorithm to first audio stream.
 TS arnndn            A->A       Reduce noise from speech using Recurrent Neural Networks.
 TS asdr              AA->A      Measure Audio Signal-to-Distortion Ratio.
 .. asegment          A->N       Segment audio stream.
 .. aselect           A->N       Select audio frames to pass in output.
 .. asendcmd          A->A       Send commands to filters.
 T. asetnsamples      A->A       Set the number of samples for each output audio frames.
 .. asetpts           A->A       Set PTS for the output audio frame.
 .. asetrate          A->A       Change the sample rate without altering the data.
 .. asettb            A->A       Set timebase for the audio output link.
 .. ashowinfo         A->A       Show textual information for each audio frame.
 T. asidedata         A->A       Manipulate audio frame side data.
 TS asisdr            AA->A      Measure Audio Scale-Invariant Signal-to-Distortion Ratio.
 TS asoftclip         A->A       Audio Soft Clipper.
 .S aspectralstats    A->A       Show frequency domain statistics about audio frames.
 .. asplit            A->N       Pass on the audio input to N audio outputs.
 .S astats            A->A       Show time domain statistics about audio frames.
 .. astreamselect     N->N       Select audio streams
 TS asubboost         A->A       Boost subwoofer frequencies.
 TS asubcut           A->A       Cut subwoofer frequencies.
 TS asupercut         A->A       Cut super frequencies.
 TS asuperpass        A->A       Apply high order Butterworth band-pass filter.
 TS asuperstop        A->A       Apply high order Butterworth band-stop filter.
 .. atempo            A->A       Adjust audio tempo.
 TS atilt             A->A       Apply spectral tilt to audio.
 .. atrim             A->A       Pick one continuous section from the input, drop the rest.
 .. axcorrelate       AA->A      Cross-correlate two audio streams.
 TS bandpass          A->A       Apply a two-pole Butterworth band-pass filter.
 TS bandreject        A->A       Apply a two-pole Butterworth band-reject filter.
 TS bass              A->A       Boost or cut lower frequencies.
 TS biquad            A->A       Apply a biquad IIR filter with the given coefficients.
 .. channelmap        A->A       Remap audio channels.
 .. channelsplit      A->N       Split audio into per-channel streams.
 .. chorus            A->A       Add a chorus effect to the audio.
 .. compand           A->A       Compress or expand audio dynamic range.
 T. compensationdelay A->A       Audio Compensation Delay Line.
 T. crossfeed         A->A       Apply headphone crossfeed filter.
 TS crystalizer       A->A       Simple audio noise sharpening filter.
 T. dcshift           A->A       Apply a DC shift to the audio.
 T. deesser           A->A       Apply de-essing to the audio.
 T. dialoguenhance    A->A       Audio Dialogue Enhancement.
 .. drmeter           A->A       Measure audio dynamic range.
 TS dynaudnorm        A->A       Dynamic Audio Normalizer.
 .. earwax            A->A       Widen the stereo image.
 .. ebur128           A->N       EBU R128 scanner.
 TS equalizer         A->A       Apply two-pole peaking equalization (EQ) filter.
 T. extrastereo       A->A       Increase difference between stereo audio channels.
 .. firequalizer      A->A       Finite Impulse Response Equalizer.
 .. flanger           A->A       Apply a flanging effect to the audio.
 .. haas              A->A       Apply Haas Stereo Enhancer.
 .. hdcd              A->A       Apply High Definition Compatible Digital (HDCD) decoding.
 .S headphone         N->A       Apply headphone binaural spatialization with HRTFs in additional streams.
 TS highpass          A->A       Apply a high-pass filter with 3dB point frequency.
 TS highshelf         A->A       Apply a high shelf filter.
 .. join              N->A       Join multiple audio streams into multi-channel output.
 .. loudnorm          A->A       EBU R128 loudness normalization
 TS lowpass           A->A       Apply a low-pass filter with 3dB point frequency.
 TS lowshelf          A->A       Apply a low shelf filter.
 .. mcompand          A->A       Multiband Compress or expand audio dynamic range.
 .. pan               A->A       Remix channels with coefficients (panning).
 .. replaygain        A->A       ReplayGain scanner.
 .. sidechaincompress AA->A      Sidechain compressor.
 T. sidechaingate     AA->A      Audio sidechain gate.
 .. silencedetect     A->A       Detect silence.
 T. silenceremove     A->A       Remove silence.
 T. speechnorm        A->A       Speech Normalizer.
 T. stereotools       A->A       Apply various stereo tools.
 T. stereowiden       A->A       Apply stereo widening effect.
 .. superequalizer    A->A       Apply 18 band equalization filter.
 .S surround          A->A       Apply audio surround upmix filter.
 TS tiltshelf         A->A       Apply a tilt shelf filter.
 TS treble            A->A       Boost or cut upper frequencies.
 T. tremolo           A->A       Apply tremolo effect.
 T. vibrato           A->A       Apply vibrato effect.
 T. virtualbass       A->A       Audio Virtual Bass.
 T. volume            A->A       Change input volume.
 .. volumedetect      A->A       Detect audio volume.
 .. aevalsrc          |->A       Generate an audio signal generated by an expression.
 .. afdelaysrc        |->A       Generate a Fractional delay FIR coefficients.
 .. afireqsrc         |->A       Generate a FIR equalizer coefficients audio stream.
 .. afirsrc           |->A       Generate a FIR coefficients audio stream.
 .. anoisesrc         |->A       Generate a noise audio signal.
 .. anullsrc          |->A       Null audio source, return empty audio frames.
 .. hilbert           |->A       Generate a Hilbert transform FIR coefficients.
 .. sinc              |->A       Generate a sinc kaiser-windowed low-pass, high-pass, band-pass, or band-reject FIR coefficients.
 .. sine              |->A       Generate sine wave audio signal.
 .. anullsink         A->|       Do absolutely nothing with the input audio.
 .. addroi            V->V       Add region of interest to frame.
 .. alphaextract      V->V       Extract an alpha channel as a grayscale image component.
 T. alphamerge        VV->V      Copy the luma value of the second input into the alpha channel of the first input.
 TS amplify           V->V       Amplify changes between successive video frames.
 .. ass               V->V       Render ASS subtitles onto input video using the libass library.
 TS atadenoise        V->V       Apply an Adaptive Temporal Averaging Denoiser.
 T. avgblur           V->V       Apply Average Blur filter.
 .. avgblur_opencl    V->V       Apply average blur filter
 .. avgblur_vulkan    V->V       Apply avgblur mask to input video
 TS backgroundkey     V->V       Turns a static background into transparency.
 T. bbox              V->V       Compute bounding box for each frame.
 .. bench             V->V       Benchmark part of a filtergraph.
 TS bilateral         V->V       Apply Bilateral filter.
 T. bitplanenoise     V->V       Measure bit plane noise.
 .S blackdetect       V->V       Detect video intervals that are (almost) black.
 .. blackframe        V->V       Detect frames that are (almost) black.
 TS blend             VV->V      Blend two video frames into each other.
 .. blend_vulkan      VV->V      Blend two video frames in Vulkan
 .. blockdetect       V->V       Blockdetect filter.
 .. blurdetect        V->V       Blurdetect filter.
 TS bm3d              N->V       Block-Matching 3D denoiser.
 T. boxblur           V->V       Blur the input.
 .. boxblur_opencl    V->V       Apply boxblur filter to input video
 TS bwdif             V->V       Deinterlace the input image.
 T. bwdif_vulkan      V->V       Deinterlace Vulkan frames via bwdif
 TS cas               V->V       Contrast Adaptive Sharpen.
 .. ccrepack          V->V       Repack CEA-708 closed caption metadata
 .. chromaber_vulkan  V->V       Offset chroma of input video (chromatic aberration)
 TS chromahold        V->V       Turns a certain color range into gray.
 TS chromakey         V->V       Turns a certain color into transparency. Operates on YUV colors.
 TS chromanr          V->V       Reduce chrominance noise.
 TS chromashift       V->V       Shift chroma.
 .. ciescope          V->V       Video CIE scope.
 T. codecview         V->V       Visualize information about some codecs.
 TS colorbalance      V->V       Adjust the color balance.
 TS colorchannelmixer V->V       Adjust colors by mixing color channels.
 TS colorcontrast     V->V       Adjust color contrast between RGB components.
 TS colorcorrect      V->V       Adjust color white balance selectively for blacks and whites.
 TS colorize          V->V       Overlay a solid color on the video stream.
 TS colorkey          V->V       Turns a certain color into transparency. Operates on RGB colors.
 .. colorkey_opencl   V->V       Turns a certain color into transparency. Operates on RGB colors.
 TS colorhold         V->V       Turns a certain color range into gray. Operates on RGB colors.
 TS colorlevels       V->V       Adjust the color levels.
 TS colormap          VVV->V     Apply custom Color Maps to video stream.
 TS colormatrix       V->V       Convert color matrix.
 TS colorspace        V->V       Convert between colorspaces.
 TS colortemperature  V->V       Adjust color temperature of video.
 TS convolution       V->V       Apply convolution filter.
 .. convolution_opencl V->V       Apply convolution mask to input video
 TS convolve          VV->V      Convolve first video stream with second video stream.
 .. copy              V->V       Copy the input video unchanged to the output.
 TS corr              VV->V      Calculate the correlation between two video streams.
 .. cover_rect        V->V       Find and cover a user specified object.
 .. crop              V->V       Crop the input video.
 T. cropdetect        V->V       Auto-detect crop size.
 .. cue               V->V       Delay filtering to match a cue.
 TS curves            V->V       Adjust components curves.
 .S datascope         V->V       Video data analysis.
 T. dblur             V->V       Apply Directional Blur filter.
 TS dctdnoiz          V->V       Denoise frames using 2D DCT.
 TS deband            V->V       Debands video.
 T. deblock           V->V       Deblock video.
 .. decimate          N->V       Decimate frames (post field matching filter).
 TS deconvolve        VV->V      Deconvolve first video stream with second video stream.
 TS dedot             V->V       Reduce cross-luminance and cross-color.
 TS deflate           V->V       Apply deflate effect.
 .. deflicker         V->V       Remove temporal frame luminance variations.
 .. deinterlace_qsv   V->V       Quick Sync Video "deinterlacing"
 .. dejudder          V->V       Remove judder produced by pullup.
 T. delogo            V->V       Remove logo from input video.
 .. deshake           V->V       Stabilize shaky video.
 .. deshake_opencl    V->V       Feature-point based video stabilization filter
 TS despill           V->V       Despill video.
 .. detelecine        V->V       Apply an inverse telecine pattern.
 TS dilation          V->V       Apply dilation effect.
 .. dilation_opencl   V->V       Apply dilation effect
 TS displace          VVV->V     Displace pixels.
 .S doubleweave       V->V       Weave input video fields into double number of frames.
 T. drawbox           V->V       Draw a colored box on the input video.
 .. drawgraph         V->V       Draw a graph using input video metadata.
 T. drawgrid          V->V       Draw a colored grid on the input video.
 T. drawtext          V->V       Draw text on top of video frames using libfreetype library.
 T. edgedetect        V->V       Detect and draw edge.
 .. elbg              V->V       Apply posterize effect, using the ELBG algorithm.
 T. entropy           V->V       Measure video frames entropy.
 .S epx               V->V       Scale the input using EPX algorithm.
 T. eq                V->V       Adjust brightness, contrast, gamma, and saturation.
 TS erosion           V->V       Apply erosion effect.
 .. erosion_opencl    V->V       Apply erosion effect
 TS estdif            V->V       Apply Edge Slope Tracing deinterlace.
 TS exposure          V->V       Adjust exposure of the video stream.
 .. extractplanes     V->N       Extract planes as grayscale frames.
 TS fade              V->V       Fade in/out input video.
 T. feedback          VV->VV     Apply feedback video filter.
 TS fftdnoiz          V->V       Denoise frames using 3D FFT.
 TS fftfilt           V->V       Apply arbitrary expressions to pixels in frequency domain.
 .. field             V->V       Extract a field from the input video.
 .. fieldhint         V->V       Field matching using hints.
 .. fieldmatch        N->V       Field matching for inverse telecine.
 T. fieldorder        V->V       Set the field order.
 T. fillborders       V->V       Fill borders of the input video.
 .. find_rect         V->V       Find a user specified object.
 .. flip_vulkan       V->V       Flip both horizontally and vertically
 T. floodfill         V->V       Fill area with same color with another color.
 .. format            V->V       Convert the input video to one of the specified pixel formats.
 .. fps               V->V       Force constant framerate.
 .. framepack         VV->V      Generate a frame packed stereoscopic video.
 .S framerate         V->V       Upsamples or downsamples progressive source between specified frame rates.
 T. framestep         V->V       Select one frame every N frames.
 .. freezedetect      V->V       Detects frozen video input.
 .. freezeframes      VV->V      Freeze video frames.
 T. fspp              V->V       Apply Fast Simple Post-processing filter.
 .. fsync             V->V       Synchronize video frames from external source.
 TS gblur             V->V       Apply Gaussian Blur filter.
 .. gblur_vulkan      V->V       Gaussian Blur in Vulkan
 TS geq               V->V       Apply generic equation to each pixel.
 T. gradfun           V->V       Debands video quickly using gradients.
 .. graphmonitor      V->V       Show various filtergraph stats.
 TS grayworld         V->V       Adjust white balance using LAB gray world algorithm
 TS greyedge          V->V       Estimates scene illumination by grey edge assumption.
 TS guided            N->V       Apply Guided filter.
 TS haldclut          VV->V      Adjust colors using a Hald CLUT.
 TS hflip             V->V       Horizontally flip the input video.
 .. hflip_vulkan      V->V       Horizontally flip the input video in Vulkan
 T. histeq            V->V       Apply global color histogram equalization.
 .. histogram         V->V       Compute and draw a histogram.
 TS hqdn3d            V->V       Apply a High Quality 3D Denoiser.
 .S hqx               V->V       Scale the input by 2, 3 or 4 using the hq*x magnification algorithm.
 .S hstack            N->V       Stack video inputs horizontally.
 TS hsvhold           V->V       Turns a certain HSV range into gray.
 TS hsvkey            V->V       Turns a certain HSV range into transparency. Operates on YUV colors.
 T. hue               V->V       Adjust the hue and saturation of the input video.
 TS huesaturation     V->V       Apply hue-saturation-intensity adjustments.
 .. hwdownload        V->V       Download a hardware frame to a normal frame
 .. hwmap             V->V       Map hardware frames
 .. hwupload          V->V       Upload a normal frame to a hardware frame
 .. hwupload_cuda     V->V       Upload a system memory frame to a CUDA device.
 T. hysteresis        VV->V      Grow first stream into second stream by connecting components.
 TS identity          VV->V      Calculate the Identity between two video streams.
 .. idet              V->V       Interlace detect Filter.
 T. il                V->V       Deinterleave or interleave fields.
 TS inflate           V->V       Apply inflate effect.
 .. interlace         V->V       Convert progressive video into interlaced.
 .. interleave        N->V       Temporally interleave video inputs.
 .. kerndeint         V->V       Apply kernel deinterlacing to the input.
 TS kirsch            V->V       Apply kirsch operator.
 TS lagfun            V->V       Slowly update darker pixels.
 T. latency           V->V       Report video filtering latency.
 TS lenscorrection    V->V       Rectify the image by correcting for lens distortion.
 .. libplacebo        N->V       Apply various GPU filters from libplacebo
 TS limitdiff         N->V       Apply filtering with limiting difference.
 TS limiter           V->V       Limit pixels components to the specified range.
 .. loop              V->V       Loop video frames.
 TS lumakey           V->V       Turns a certain luma into transparency.
 TS lut               V->V       Compute and apply a lookup table to the RGB/YUV input video.
 TS lut1d             V->V       Adjust colors using a 1D LUT.
 TS lut2              VV->V      Compute and apply a lookup table from two video inputs.
 TS lut3d             V->V       Adjust colors using a 3D LUT.
 TS lutrgb            V->V       Compute and apply a lookup table to the RGB input video.
 TS lutyuv            V->V       Compute and apply a lookup table to the YUV input video.
 TS maskedclamp       VVV->V     Clamp first stream with second stream and third stream.
 TS maskedmax         VVV->V     Apply filtering with maximum difference of two streams.
 TS maskedmerge       VVV->V     Merge first stream with second stream using third stream as mask.
 TS maskedmin         VVV->V     Apply filtering with minimum difference of two streams.
 TS maskedthreshold   VV->V      Pick pixels comparing absolute difference of two streams with threshold.
 TS maskfun           V->V       Create Mask.
 .. mcdeint           V->V       Apply motion compensating deinterlacing.
 TS median            V->V       Apply Median filter.
 .. mergeplanes       N->V       Merge planes.
 .. mestimate         V->V       Generate motion vectors.
 T. metadata          V->V       Manipulate video frame metadata.
 T. midequalizer      VV->V      Apply Midway Equalization.
 .. minterpolate      V->V       Frame rate conversion using Motion Interpolation.
 TS mix               N->V       Mix video inputs.
 TS monochrome        V->V       Convert video to gray using custom color filter.
 TS morpho            VV->V      Apply Morphological filter.
 .. mpdecimate        V->V       Remove near-duplicate frames.
 TS msad              VV->V      Calculate the MSAD between two video streams.
 TS multiply          VV->V      Multiply first video stream with second video stream.
 TS negate            V->V       Negate input video.
 TS nlmeans           V->V       Non-local means denoiser.
 .. nlmeans_opencl    V->V       Non-local means denoiser through OpenCL
 .. nlmeans_vulkan    V->V       Non-local means denoiser (Vulkan)
 TS nnedi             V->V       Apply neural network edge directed interpolation intra-only deinterlacer.
 .. noformat          V->V       Force libavfilter not to use any of the specified pixel formats for the input to the next filter.
 TS noise             V->V       Add noise.
 T. normalize         V->V       Normalize RGB video.
 .. null              V->V       Pass the source unchanged to the output.
 T. oscilloscope      V->V       2D Video Oscilloscope.
 TS overlay           VV->V      Overlay a video source on top of the input.
 .. overlay_opencl    VV->V      Overlay one video on top of another
 .. overlay_qsv       VV->V      Quick Sync Video overlay.
 .. overlay_vulkan    VV->V      Overlay a source on top of another
 T. owdenoise         V->V       Denoise using wavelets.
 .. pad               V->V       Pad the input video.
 .. pad_opencl        V->V       Pad the input video.
 .. palettegen        V->V       Find the optimal palette for a given stream.
 .. paletteuse        VV->V      Use a palette to downsample an input video stream.
 T. perms             V->V       Set permissions for the output video frame.
 TS perspective       V->V       Correct the perspective of video.
 T. phase             V->V       Phase shift fields.
 .. photosensitivity  V->V       Filter out photosensitive epilepsy seizure-inducing flashes.
 .. pixdesctest       V->V       Test pixel format definitions.
 TS pixelize          V->V       Pixelize video.
 T. pixscope          V->V       Pixel data analysis.
 T. pp                V->V       Filter video using libpostproc.
 T. pp7               V->V       Apply Postprocessing 7 filter.
 TS premultiply       N->V       PreMultiply first stream with first plane of second stream.
 TS prewitt           V->V       Apply prewitt operator.
 .. prewitt_opencl    V->V       Apply prewitt operator
 .. program_opencl    N->V       Filter video using an OpenCL program
 TS pseudocolor       V->V       Make pseudocolored video frames.
 TS psnr              VV->V      Calculate the PSNR between two video streams.
 .. pullup            V->V       Pullup from field sequence to frames.
 T. qp                V->V       Change video quantization parameters.
 .. random            V->V       Return random frames.
 TS readeia608        V->V       Read EIA-608 Closed Caption codes from input video and write them to frame metadata.
 .. readvitc          V->V       Read vertical interval timecode and write it to frame metadata.
 .. realtime          V->V       Slow down filtering to match realtime.
 .S remap             VVV->V     Remap pixels.
 .. remap_opencl      VVV->V     Remap pixels using OpenCL.
 TS removegrain       V->V       Remove grain.
 T. removelogo        V->V       Remove a TV logo based on a mask image.
 .. repeatfields      V->V       Hard repeat fields based on MPEG repeat field flag.
 .. reverse           V->V       Reverse a clip.
 TS rgbashift         V->V       Shift RGBA.
 TS roberts           V->V       Apply roberts cross operator.
 .. roberts_opencl    V->V       Apply roberts operator
 TS rotate            V->V       Rotate the input image.
 T. sab               V->V       Apply shape adaptive blur.
 .. scale             V->V       Scale the input video size and/or convert the image format.
 .. scale_qsv         V->V       Quick Sync Video "scaling and format conversion"
 .. scale_vulkan      V->V       Scale Vulkan frames
 .. scale2ref         VV->VV     Scale the input video size and/or convert the image format to the given reference.
 .. scdet             V->V       Detect video scene change
 TS scharr            V->V       Apply scharr operator.
 TS scroll            V->V       Scroll input video.
 .. segment           V->N       Segment video stream.
 .. select            V->N       Select video frames to pass in output.
 TS selectivecolor    V->V       Apply CMYK adjustments to specific color ranges.
 .. sendcmd           V->V       Send commands to filters.
 .. separatefields    V->V       Split input video frames into fields.
 .. setdar            V->V       Set the frame display aspect ratio.
 .. setfield          V->V       Force field for the output video frame.
 .. setparams         V->V       Force field, or color property for the output video frame.
 .. setpts            V->V       Set PTS for the output video frame.
 .. setrange          V->V       Force color range for the output video frame.
 .. setsar            V->V       Set the pixel sample aspect ratio.
 .. settb             V->V       Set timebase for the video output link.
 TS shear             V->V       Shear transform the input image.
 .. showinfo          V->V       Show textual information for each video frame.
 .. showpalette       V->V       Display frame palette.
 T. shuffleframes     V->V       Shuffle video frames.
 TS shufflepixels     V->V       Shuffle video pixels.
 T. shuffleplanes     V->V       Shuffle video planes.
 T. sidedata          V->V       Manipulate video frame side data.
 .S signalstats       V->V       Generate statistics from video analysis.
 .. signature         N->V       Calculate the MPEG-7 video signature
 .. siti              V->V       Calculate spatial information (SI) and temporal information (TI).
 T. smartblur         V->V       Blur the input video without impacting the outlines.
 TS sobel             V->V       Apply sobel operator.
 .. sobel_opencl      V->V       Apply sobel operator
 .. split             V->N       Pass on the input to N video outputs.
 T. spp               V->V       Apply a simple post processing filter.
 TS ssim              VV->V      Calculate the SSIM between two video streams.
 .. ssim360           VV->V      Calculate the SSIM between two 360 video streams.
 .S stereo3d          V->V       Convert video stereoscopic 3D view.
 .. streamselect      N->N       Select video streams
 .. subtitles         V->V       Render text subtitles onto input video using the libass library.
 .S super2xsai        V->V       Scale the input by 2x using the Super2xSaI pixel art algorithm.
 T. swaprect          V->V       Swap 2 rectangular objects in video.
 T. swapuv            V->V       Swap U and V components.
 TS tblend            V->V       Blend successive frames.
 .. telecine          V->V       Apply a telecine pattern.
 .. thistogram        V->V       Compute and draw a temporal histogram.
 TS threshold         VVVV->V    Threshold first video stream using other video streams.
 TS thumbnail         V->V       Select the most representative frame in a given sequence of consecutive frames.
 .. tile              V->V       Tile several successive frames together.
 .. tiltandshift      V->V       Generate a tilt-and-shift'd video.
 .. tinterlace        V->V       Perform temporal field interlacing.
 TS tlut2             V->V       Compute and apply a lookup table from two successive frames.
 TS tmedian           V->V       Pick median pixels from successive frames.
 T. tmidequalizer     V->V       Apply Temporal Midway Equalization.
 TS tmix              V->V       Mix successive video frames.
 .S tonemap           V->V       Conversion to/from different dynamic ranges.
 .. tonemap_opencl    V->V       Perform HDR to SDR conversion with tonemapping.
 .. tpad              V->V       Temporarily pad video frames.
 .S transpose         V->V       Transpose input video.
 .. transpose_opencl  V->V       Transpose input video
 .. transpose_vulkan  V->V       Transpose Vulkan Filter
 .. trim              V->V       Pick one continuous section from the input, drop the rest.
 TS unpremultiply     N->V       UnPreMultiply first stream with first plane of second stream.
 TS unsharp           V->V       Sharpen or blur the input video.
 .. unsharp_opencl    V->V       Apply unsharp mask to input video
 .. untile            V->V       Untile a frame into a sequence of frames.
 TS uspp              V->V       Apply Ultra Simple / Slow Post-processing filter.
 .S v360              V->V       Convert 360 projection of video.
 T. vaguedenoiser     V->V       Apply a Wavelet based Denoiser.
 TS varblur           VV->V      Apply Variable Blur filter.
 .. vectorscope       V->V       Video vectorscope.
 T. vflip             V->V       Flip the input video vertically.
 .. vflip_vulkan      V->V       Vertically flip the input video in Vulkan
 .. vfrdet            V->V       Variable frame rate detect filter.
 TS vibrance          V->V       Boost or alter saturation.
 .. vidstabdetect     V->V       Extract relative transformations, pass 1 of 2 for stabilization (see vidstabtransform for pass 2).
 .. vidstabtransform  V->V       Transform the frames, pass 2 of 2 for stabilization (see vidstabdetect for pass 1).
 TS vif               VV->V      Calculate the VIF between two video streams.
 T. vignette          V->V       Make or reverse a vignette effect.
 .. vmafmotion        V->V       Calculate the VMAF Motion score.
 .. vpp_qsv           V->V       Quick Sync Video "VPP"
 .S vstack            N->V       Stack video inputs vertically.
 TS w3fdif            V->V       Apply Martin Weston three field deinterlace.
 .S waveform          V->V       Video waveform monitor.
 .S weave             V->V       Weave input video fields into frames.
 .S xbr               V->V       Scale the input using xBR algorithm.
 TS xcorrelate        VV->V      Cross-correlate first video stream with second video stream.
 .S xfade             VV->V      Cross fade one video with another video.
 .. xfade_opencl      VV->V      Cross fade one video with another video.
 .. xfade_vulkan      VV->V      Cross fade one video with another video.
 TS xmedian           N->V       Pick median pixels from several video inputs.
 T. xpsnr             VV->V      Calculate the extended perceptually weighted peak signal-to-noise ratio (XPSNR) between two video streams.
 .S xstack            N->V       Stack video inputs into custom layout.
 TS yadif             V->V       Deinterlace the input image.
 TS yaepblur          V->V       Yet another edge preserving blur filter.
 .. zoompan           V->V       Apply Zoom & Pan effect.
 .S zscale            V->V       Apply resizing, colorspace and bit depth conversion.
 .. hstack_qsv        N->V       "Quick Sync Video" hstack
 .. vstack_qsv        N->V       "Quick Sync Video" vstack
 .. xstack_qsv        N->V       "Quick Sync Video" xstack
 .. allrgb            |->V       Generate all RGB colors.
 .. allyuv            |->V       Generate all yuv colors.
 .. cellauto          |->V       Create pattern generated by an elementary cellular automaton.
 .. color             |->V       Provide an uniformly colored input.
 .. color_vulkan      |->V       Generate a constant color (Vulkan)
 .. colorchart        |->V       Generate color checker chart.
 .. colorspectrum     |->V       Generate colors spectrum.
 .. ddagrab           |->V       Grab Windows Desktop images using Desktop Duplication API
 .S gradients         |->V       Draw a gradients.
 .. haldclutsrc       |->V       Provide an identity Hald CLUT.
 .. life              |->V       Create life.
 .. mandelbrot        |->V       Render a Mandelbrot fractal.
 .. mptestsrc         |->V       Generate various test pattern.
 .. nullsrc           |->V       Null video source, return unprocessed video frames.
 .. openclsrc         |->V       Generate video using an OpenCL program
 .. pal75bars         |->V       Generate PAL 75% color bars.
 .. pal100bars        |->V       Generate PAL 100% color bars.
 .. perlin            |->V       Generate Perlin noise
 .. rgbtestsrc        |->V       Generate RGB test pattern.
 .S sierpinski        |->V       Render a Sierpinski fractal.
 .. smptebars         |->V       Generate SMPTE color bars.
 .. smptehdbars       |->V       Generate SMPTE HD color bars.
 .. testsrc           |->V       Generate test pattern.
 .. testsrc2          |->V       Generate another test pattern.
 .. yuvtestsrc        |->V       Generate YUV test pattern.
 .S zoneplate         |->V       Generate zone-plate.
 .. nullsink          V->|       Do absolutely nothing with the input video.
 .. a3dscope          A->V       Convert input audio to 3d scope video output.
 .. abitscope         A->V       Convert input audio to audio bit scope video output.
 .. adrawgraph        A->V       Draw a graph using input audio metadata.
 .. agraphmonitor     A->V       Show various filtergraph stats.
 .. ahistogram        A->V       Convert input audio to histogram video output.
 .. aphasemeter       A->N       Convert input audio to phase meter video output.
 .S avectorscope      A->V       Convert input audio to vectorscope video output.
 .. concat            N->N       Concatenate audio and video streams.
 .. showcqt           A->V       Convert input audio to a CQT (Constant/Clamped Q Transform) spectrum video output.
 .S showcwt           A->V       Convert input audio to a CWT (Continuous Wavelet Transform) spectrum video output.
 .. showfreqs         A->V       Convert input audio to a frequencies video output.
 .S showspatial       A->V       Convert input audio to a spatial video output.
 .S showspectrum      A->V       Convert input audio to a spectrum video output.
 .S showspectrumpic   A->V       Convert input audio to a spectrum video output single picture.
 .. showvolume        A->V       Convert input audio volume to video output.
 .. showwaves         A->V       Convert input audio to a video output.
 .. showwavespic      A->V       Convert input audio to a video output single picture.
 .. spectrumsynth     VV->A      Convert input spectrum videos to audio output.
 .. avsynctest        |->AV      Generate an Audio Video Sync Test.
 .. amovie            |->N       Read audio from a movie source.
 .. movie             |->N       Read from a movie source.
 .. abuffer           |->A       Buffer audio frames, and make them accessible to the filterchain.
 .. buffer            |->V       Buffer video frames, and make them accessible to the filterchain.
 .. abuffersink       A->|       Buffer audio frames, and make them available to the end of the filter graph.
 .. buffersink        V->|       Buffer video frames, and make them available to the end of the filter graph.