Filters - FFmpeg 2.4.14

Audio

aconvert: Convert the input audio format to the specified formats.
adelay: Delay one or more audio channels.
aecho: Apply echoing to the input audio.
aeval: Modify an audio signal according to the specified expressions.
afade: Apply fade-in/out effect to input audio.
aformat: Set output format constraints for the input audio.
allpass: Apply a two-pole all-pass filter with central frequency (in Hz) frequency, and filter-width width.
amerge: Merge two or more audio streams into a single multi-channel stream.
amix: Mixes multiple audio inputs into a single output.
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.
aresample: Resample the input audio to the specified parameters, using the libswresample library.
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.
astreamsync: Forward two audio streams and control the order the buffers are forwarded.
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.
compand: Compress or expand the audio’s dynamic range.
earwax: Make audio easier to listen to on headphones.
equalizer: Apply a two-pole peaking equalisation (EQ) filter.
flanger: Apply a flanging effect to the audio.
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.
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.
silencedetect: Detect silence in an audio stream.
silenceremove: Remove silence from the beginning, middle or end of the audio.
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.
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.
bbox: Compute the bounding box for the non-black pixels in the input frame luminance plane.
blackdetect: Detect video intervals that are (almost) completely black.
blackframe: Detect frames that are (almost) completely black.
blend: Blend two video frames into each other.
boxblur: Apply a boxblur algorithm to the input video.
codecview: Visualize information exported by some codecs.
colorbalance: Modify intensity of primary colors (red, green and blue) of input frames.
colorchannelmixer: Adjust video input frames by re-mixing color channels.
colormatrix: Convert color matrix.
copy: Copy the input source unchanged to the output.
crop: Crop the input video to given dimensions.
cropdetect: Auto-detect the crop size.
curves: Apply color adjustments using curves.
dctdnoiz: Denoise frames using 2D DCT (frequency domain filtering).
decimate: Drop duplicated frames at regular intervals.
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.
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.
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.
field: Extract a single field from an interlaced image using stride arithmetic to avoid wasting CPU time.
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.
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.
framestep: Select one frame every N-th frame.
frei0r: Apply a frei0r effect to the input video.
geq: The filter accepts the following options: .
gradfun: Fix the banding artifacts that are sometimes introduced into nearly flat regions by truncation to 8bit 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.
hqx: Apply a high-quality magnification filter designed for pixel art.
hue: Modify the hue and/or the saturation of the input.
idet: Detect video interlacing type.
il: Deinterleave or interleave fields.
interlace: Simple interlacing filter from progressive contents.
kerndeint: Deinterlace input video by applying Donald Graft’s adaptive kernel deinterling.
lenscorrection: Correct radial lens distortion .
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.
mergeplanes: Merge color channel components from several video streams.
mcdeint: Apply motion-compensation deinterlacing.
mp: Apply an MPlayer filter to the input video.
mpdecimate: Drop frames that do not differ greatly from the previous frame in order to reduce frame rate.
negate: Negate input video.
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.
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.
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.
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.
removelogo: Suppress a TV station logo, using an image file to determine which pixels comprise the logo.
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.
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.
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.
stereo3d: Convert between different stereoscopic image formats.
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.
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.
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.
w3fdif: Deinterlace the input video ("w3fdif" stands for "Weston 3 Field Deinterlacing Filter").
yadif: Deinterlace the input video ("yadif" means "yet another deinterlacing filter").
zoompan: Apply Zoom & Pan effect.

Multimedia

avectorscope: Convert input audio to a video output, representing the audio vector scope.
concat: Concatenate audio and video streams, joining them together one after the other.
ebur128: EBU R128 scanner filter.
interleave: interleave works with video inputs, ainterleave with audio.
ainterleave: interleave works with video inputs, ainterleave with audio.
perms: Set read/write permissions for the output frames.
aperms: Set read/write permissions for the output frames.
select: Select frames to pass in output.
aselect: Select frames to pass in output.
sendcmd: sendcmd must be inserted between two video filters, asendcmd must be inserted between two audio filters, but apart from that they act the same way.
asendcmd: sendcmd must be inserted between two video filters, asendcmd must be inserted between two audio filters, but apart from that they act the same way.
setpts: setpts works on video frames, asetpts on audio frames.
asetpts: setpts works on video frames, asetpts on audio frames.
settb: Set the timebase to use for the output frames timestamps.
asettb: Set the timebase to use for the output frames timestamps.
showcqt: Convert input audio to a video output representing frequency spectrum logarithmically (using constant Q transform with Brown-Puckette algorithm), with musical tone scale, from E0 to D#10 (10 octaves).
showspectrum: Convert input audio to a video output, representing the audio frequency spectrum.
showwaves: Convert input audio to a video output, representing the samples waves.
split: asplit works with audio input, split with video.
asplit: asplit works with audio input, split with video.
zmq: zmq and azmq work as a pass-through filters.
azmq: zmq and azmq work as a pass-through filters.