Filters - FFmpeg 3.2.19

Audio

acompressor: A compressor is mainly used to reduce the dynamic range of a signal.
acrossfade: Apply cross fade from one input audio stream to another input audio stream.
acrusher: Reduce audio bit resolution.
adelay: Delay one or more audio channels.
aecho: Apply echoing to the input audio.
aemphasis: Audio emphasis filter creates or restores material directly taken from LPs or emphased CDs with different filter curves.
aeval: Modify an audio signal according to the specified expressions.
afade: Apply fade-in/out effect to input audio.
afftfilt: Apply arbitrary expressions to samples in frequency domain.
aformat: Set output format constraints for the input audio.
agate: A gate is mainly used to reduce lower parts of a signal.
alimiter: The limiter prevents an input signal from rising over a desired threshold.
allpass: Apply a two-pole all-pass filter with central frequency (in Hz) frequency, and filter-width width.
aloop: Loop audio samples.
amerge: Merge two or more audio streams into a single multi-channel stream.
amix: Mixes multiple audio inputs into a single output.
anequalizer: High-order parametric multiband equalizer for each channel.
anull: Pass the audio source unchanged to the output.
apad: Pad the end of an audio stream with silence.
aphaser: Add a phasing effect to the input audio.
apulsator: Audio pulsator is something between an autopanner and a tremolo.
aresample: Resample the input audio to the specified parameters, using the libswresample library.
areverse: Reverse an audio clip.
asetnsamples: Set the number of samples per each output audio frame.
asetrate: Set the sample rate without altering the PCM data.
ashowinfo: Show a line containing various information for each input audio frame.
astats: Display time domain statistical information about the audio channels.
asyncts: Synchronize audio data with timestamps by squeezing/stretching it and/or dropping samples/adding silence when needed.
atempo: Adjust audio tempo.
atrim: Trim the input so that the output contains one continuous subpart of the input.
bandpass: Apply a two-pole Butterworth band-pass filter with central frequency frequency, and (3dB-point) band-width width.
bandreject: Apply a two-pole Butterworth band-reject filter with central frequency frequency, and (3dB-point) band-width width.
bass: Boost or cut the bass (lower) frequencies of the audio using a two-pole shelving filter with a response similar to that of a standard hi-fi’s tone-controls.
biquad: Apply a biquad IIR filter with the given coefficients.
bs2b: Bauer stereo to binaural transformation, which improves headphone listening of stereo audio records.
channelmap: Remap input channels to new locations.
channelsplit: Split each channel from an input audio stream into a separate output stream.
chorus: Add a chorus effect to the audio.
compand: Compress or expand the audio’s dynamic range.
compensationdelay: Compensation Delay Line is a metric based delay to compensate differing positions of microphones or speakers.
crystalizer: Simple algorithm to expand audio dynamic range.
dcshift: Apply a DC shift to the audio.
dynaudnorm: Dynamic Audio Normalizer.
earwax: Make audio easier to listen to on headphones.
equalizer: Apply a two-pole peaking equalisation (EQ) filter.
extrastereo: Linearly increases the difference between left and right channels which adds some sort of "live" effect to playback.
firequalizer: Apply FIR Equalization using arbitrary frequency response.
flanger: Apply a flanging effect to the audio.
hdcd: Decodes High Definition Compatible Digital (HDCD) data.
highpass: Apply a high-pass filter with 3dB point frequency.
join: Join multiple input streams into one multi-channel stream.
ladspa: Load a LADSPA (Linux Audio Developer’s Simple Plugin API) plugin.
loudnorm: EBU R128 loudness normalization.
lowpass: Apply a low-pass filter with 3dB point frequency.
pan: Mix channels with specific gain levels.
replaygain: ReplayGain scanner filter.
resample: Convert the audio sample format, sample rate and channel layout.
rubberband: Apply time-stretching and pitch-shifting with librubberband.
sidechaincompress: This filter acts like normal compressor but has the ability to compress detected signal using second input signal.
sidechaingate: A sidechain gate acts like a normal (wideband) gate but has the ability to filter the detected signal before sending it to the gain reduction stage.
silencedetect: Detect silence in an audio stream.
silenceremove: Remove silence from the beginning, middle or end of the audio.
sofalizer: SOFAlizer uses head-related transfer functions (HRTFs) to create virtual loudspeakers around the user for binaural listening via headphones (audio formats up to 9 channels supported).
stereotools: This filter has some handy utilities to manage stereo signals, for converting M/S stereo recordings to L/R signal while having control over the parameters or spreading the stereo image of master track.
stereowiden: This filter enhance the stereo effect by suppressing signal common to both channels and by delaying the signal of left into right and vice versa, thereby widening the stereo effect.
treble: Boost or cut treble (upper) frequencies of the audio using a two-pole shelving filter with a response similar to that of a standard hi-fi’s tone-controls.
tremolo: Sinusoidal amplitude modulation.
vibrato: Sinusoidal phase modulation.
volume: Adjust the input audio volume.
volumedetect: Detect the volume of the input video.

Video

alphaextract: Extract the alpha component from the input as a grayscale video.
alphamerge: Add or replace the alpha component of the primary input with the grayscale value of a second input.
ass: Same as the subtitles filter, except that it doesn’t require libavcodec and libavformat to work.
atadenoise: Apply an Adaptive Temporal Averaging Denoiser to the video input.
avgblur: Apply average blur filter.
bbox: Compute the bounding box for the non-black pixels in the input frame luminance plane.
bitplanenoise: Show and measure bit plane noise.
blackdetect: Detect video intervals that are (almost) completely black.
blackframe: Detect frames that are (almost) completely black.
blend: The blend filter takes two input streams and outputs one stream, the first input is the "top" layer and second input is "bottom" layer.
tblend: The tblend (time blend) filter takes two consecutive frames from one single stream, and outputs the result obtained by blending the new frame on top of the old frame.
boxblur: Apply a boxblur algorithm to the input video.
bwdif: Deinterlace the input video ("bwdif" stands for "Bob Weaver Deinterlacing Filter").
chromakey: YUV colorspace color/chroma keying.
ciescope: Display CIE color diagram with pixels overlaid onto it.
codecview: Visualize information exported by some codecs.
colorbalance: Modify intensity of primary colors (red, green and blue) of input frames.
colorkey: RGB colorspace color keying.
colorlevels: Adjust video input frames using levels.
colorchannelmixer: Adjust video input frames by re-mixing color channels.
colormatrix: Convert color matrix.
colorspace: Convert colorspace, transfer characteristics or color primaries.
convolution: Apply convolution 3x3 or 5x5 filter.
copy: Copy the input source unchanged to the output.
coreimage: Video filtering on GPU using Apple’s CoreImage API on OSX.
crop: Crop the input video to given dimensions.
cropdetect: Auto-detect the crop size.
curves: Apply color adjustments using curves.
datascope: Video data analysis filter.
dctdnoiz: Denoise frames using 2D DCT (frequency domain filtering).
deband: Remove banding artifacts from input video.
decimate: Drop duplicated frames at regular intervals.
deflate: Apply deflate effect to the video.
dejudder: Remove judder produced by partially interlaced telecined content.
delogo: Suppress a TV station logo by a simple interpolation of the surrounding pixels.
deshake: Attempt to fix small changes in horizontal and/or vertical shift.
detelecine: Apply an exact inverse of the telecine operation.
dilation: Apply dilation effect to the video.
displace: Displace pixels as indicated by second and third input stream.
drawbox: Draw a colored box on the input image.
drawgrid: Draw a grid on the input image.
drawtext: Draw a text string or text from a specified file on top of a video, using the libfreetype library.
edgedetect: Detect and draw edges.
eq: Set brightness, contrast, saturation and approximate gamma adjustment.
erosion: Apply erosion effect to the video.
extractplanes: Extract color channel components from input video stream into separate grayscale video streams.
elbg: Apply a posterize effect using the ELBG (Enhanced LBG) algorithm.
fade: Apply a fade-in/out effect to the input video.
fftfilt: Apply arbitrary expressions to samples in frequency domain .
field: Extract a single field from an interlaced image using stride arithmetic to avoid wasting CPU time.
fieldhint: Create new frames by copying the top and bottom fields from surrounding frames supplied as numbers by the hint file.
fieldmatch: Field matching filter for inverse telecine.
fieldorder: Transform the field order of the input video.
fifo: Buffer input images and send them when they are requested.
afifo: Buffer input images and send them when they are requested.
find_rect: Find a rectangular object .
cover_rect: Cover a rectangular object .
format: Convert the input video to one of the specified pixel formats.
fps: Convert the video to specified constant frame rate by duplicating or dropping frames as necessary.
framepack: Pack two different video streams into a stereoscopic video, setting proper metadata on supported codecs.
framerate: Change the frame rate by interpolating new video output frames from the source frames.
framestep: Select one frame every N-th frame.
frei0r: Apply a frei0r effect to the input video.
fspp: Apply fast and simple postprocessing.
gblur: Apply Gaussian blur filter.
geq: The filter accepts the following options: .
gradfun: Fix the banding artifacts that are sometimes introduced into nearly flat regions by truncation to 8-bit color depth.
haldclut: Apply a Hald CLUT to a video stream.
hflip: Flip the input video horizontally.
histeq: This filter applies a global color histogram equalization on a per-frame basis.
histogram: Compute and draw a color distribution histogram for the input video.
hqdn3d: This is a high precision/quality 3d denoise filter.
hwupload_cuda: Upload system memory frames to a CUDA device.
hqx: Apply a high-quality magnification filter designed for pixel art.
hstack: Stack input videos horizontally.
hue: Modify the hue and/or the saturation of the input.
hysteresis: Grow first stream into second stream by connecting components.
idet: Detect video interlacing type.
il: Deinterleave or interleave fields.
inflate: Apply inflate effect to the video.
interlace: Simple interlacing filter from progressive contents.
kerndeint: Deinterlace input video by applying Donald Graft’s adaptive kernel deinterling.
lenscorrection: Correct radial lens distortion .
loop: Loop video frames.
lut3d: Apply a 3D LUT to an input video.
lut: Compute a look-up table for binding each pixel component input value to an output value, and apply it to the input video.
lutrgb: Compute a look-up table for binding each pixel component input value to an output value, and apply it to the input video.
lutyuv: Compute a look-up table for binding each pixel component input value to an output value, and apply it to the input video.
lut2: Compute and apply a lookup table from two video inputs.
maskedclamp: Clamp the first input stream with the second input and third input stream.
maskedmerge: Merge the first input stream with the second input stream using per pixel weights in the third input stream.
mcdeint: Apply motion-compensation deinterlacing.
mergeplanes: Merge color channel components from several video streams.
mestimate: Estimate and export motion vectors using block matching algorithms.
minterpolate: Convert the video to specified frame rate using motion interpolation.
mpdecimate: Drop frames that do not differ greatly from the previous frame in order to reduce frame rate.
negate: Negate input video.
nlmeans: Denoise frames using Non-Local Means algorithm.
nnedi: Deinterlace video using neural network edge directed interpolation.
noformat: Force libavfilter not to use any of the specified pixel formats for the input to the next filter.
noise: Add noise on video input frame.
null: Pass the video source unchanged to the output.
ocr: Optical Character Recognition .
ocv: Apply a video transform using libopencv.
overlay: Overlay one video on top of another.
owdenoise: Apply Overcomplete Wavelet denoiser.
pad: Add paddings to the input image, and place the original input at the provided x, y coordinates.
palettegen: Generate one palette for a whole video stream.
paletteuse: Use a palette to downsample an input video stream.
perspective: Correct perspective of video not recorded perpendicular to the screen.
phase: Delay interlaced video by one field time so that the field order changes.
pixdesctest: Pixel format descriptor test filter, mainly useful for internal testing.
pp: Enable the specified chain of postprocessing subfilters using libpostproc.
pp7: Apply Postprocessing filter 7.
prewitt: Apply prewitt operator to input video stream.
psnr: Obtain the average, maximum and minimum PSNR (Peak Signal to Noise Ratio) between two input videos.
pullup: Pulldown reversal (inverse telecine) filter, capable of handling mixed hard-telecine, 24000/1001 fps progressive, and 30000/1001 fps progressive content.
qp: Change video quantization parameters (QP).
random: Flush video frames from internal cache of frames into a random order.
readvitc: Read vertical interval timecode (VITC) information from the top lines of a video frame.
remap: Remap pixels using 2nd: Xmap and 3rd: Ymap input video stream.
removegrain: The removegrain filter is a spatial denoiser for progressive video.
removelogo: Suppress a TV station logo, using an image file to determine which pixels comprise the logo.
repeatfields: This filter uses the repeat_field flag from the Video ES headers and hard repeats fields based on its value.
reverse: Reverse a video clip.
rotate: Rotate video by an arbitrary angle expressed in radians.
sab: Apply Shape Adaptive Blur.
scale: Scale (resize) the input video, using the libswscale library.
scale_npp: Use the NVIDIA Performance Primitives (libnpp) to perform scaling and/or pixel format conversion on CUDA video frames.
scale2ref: Scale (resize) the input video, based on a reference video.
selectivecolor: Adjust cyan, magenta, yellow and black (CMYK) to certain ranges of colors (such as "reds", "yellows", "greens", "cyans", .
separatefields: The separatefields takes a frame-based video input and splits each frame into its components fields, producing a new half height clip with twice the frame rate and twice the frame count.
setdar: The setdar filter sets the Display Aspect Ratio for the filter output video.
setsar: The setsar filter sets the Sample (aka Pixel) Aspect Ratio for the filter output video.
setfield: Force field for the output video frame.
showinfo: Show a line containing various information for each input video frame.
showpalette: Displays the 256 colors palette of each frame.
shuffleframes: Reorder and/or duplicate video frames.
shuffleplanes: Reorder and/or duplicate video planes.
signalstats: Evaluate various visual metrics that assist in determining issues associated with the digitization of analog video media.
smartblur: Blur the input video without impacting the outlines.
ssim: Obtain the SSIM (Structural SImilarity Metric) between two input videos.
stereo3d: Convert between different stereoscopic image formats.
streamselect: The streamselect and astreamselect filter supports the following commands: .
astreamselect: The streamselect and astreamselect filter supports the following commands: .
sobel: Apply sobel operator to input video stream.
spp: Apply a simple postprocessing filter that compresses and decompresses the image at several (or - in the case of quality level 6 - all) shifts and average the results.
subtitles: Draw subtitles on top of input video using the libass library.
super2xsai: Scale the input by 2x and smooth using the Super2xSaI (Scale and Interpolate) pixel art scaling algorithm.
swaprect: Swap two rectangular objects in video.
swapuv: Swap U & V plane.
telecine: Apply telecine process to the video.
thumbnail: Select the most representative frame in a given sequence of consecutive frames.
tile: Tile several successive frames together.
tinterlace: Perform various types of temporal field interlacing.
transpose: Transpose rows with columns in the input video and optionally flip it.
trim: Trim the input so that the output contains one continuous subpart of the input.
unsharp: Sharpen or blur the input video.
uspp: Apply ultra slow/simple postprocessing filter that compresses and decompresses the image at several (or - in the case of quality level 8 - all) shifts and average the results.
vaguedenoiser: Apply a wavelet based denoiser.
vectorscope: Display 2 color component values in the two dimensional graph (which is called a vectorscope).
vidstabdetect: Analyze video stabilization/deshaking.
vidstabtransform: Video stabilization/deshaking: pass 2 of 2, see vidstabdetect for pass 1.
vflip: Flip the input video vertically.
vignette: Make or reverse a natural vignetting effect.
vstack: Stack input videos vertically.
w3fdif: Deinterlace the input video ("w3fdif" stands for "Weston 3 Field Deinterlacing Filter").
waveform: Video waveform monitor.
weave: The weave takes a field-based video input and join each two sequential fields into single frame, producing a new double height clip with half the frame rate and half the frame count.
xbr: Apply the xBR high-quality magnification filter which is designed for pixel art.
yadif: Deinterlace the input video ("yadif" means "yet another deinterlacing filter").
zoompan: Apply Zoom & Pan effect.
zscale: Scale (resize) the input video, using the z.