Sources - FFmpeg 7.1

Audio

abuffer: Buffer audio frames, and make them available to the filter chain.
aevalsrc: Generate an audio signal specified by an expression.
afdelaysrc: Generate a fractional delay FIR coefficients.
afireqsrc: Generate a FIR equalizer coefficients.
afirsrc: Generate a FIR coefficients using frequency sampling method.
anullsrc: The null audio source, return unprocessed audio frames.
flite: Synthesize a voice utterance using the libflite library.
anoisesrc: Generate a noise audio signal.
hilbert: Generate odd-tap Hilbert transform FIR coefficients.
sinc: Generate a sinc kaiser-windowed low-pass, high-pass, band-pass, or band-reject FIR coefficients.
sine: Generate an audio signal made of a sine wave with amplitude 1/8.

Video

buffer: Buffer video frames, and make them available to the filter chain.
cellauto: Create a pattern generated by an elementary cellular automaton.
coreimagesrc: Video source generated on GPU using Apple’s CoreImage API on OSX.
ddagrab: Captures the Windows Desktop via Desktop Duplication API.
gradients: Generate several gradients.
mandelbrot: Generate a Mandelbrot set fractal, and progressively zoom towards the point specified with start_x and start_y.
mptestsrc: Generate various test patterns, as generated by the MPlayer test filter.
frei0r_src: Provide a frei0r source.
life: Generate a life pattern.
perlin: Generate Perlin noise.
qrencodesrc: Generate a QR code using the libqrencode library (see https://fukuchi.
allrgb: The allrgb source returns frames of size 4096x4096 of all rgb colors.
allyuv: The allyuv source returns frames of size 4096x4096 of all yuv colors.
color: The color source provides an uniformly colored input.
colorchart: The colorchart source provides a colors checker chart.
colorspectrum: The colorspectrum source provides a color spectrum input.
haldclutsrc: The haldclutsrc source provides an identity Hald CLUT.
nullsrc: The nullsrc source returns unprocessed video frames.
pal75bars: The pal75bars source generates a color bars pattern, based on EBU PAL recommendations with 75% color levels.
pal100bars: The pal100bars source generates a color bars pattern, based on EBU PAL recommendations with 100% color levels.
rgbtestsrc: The rgbtestsrc source generates an RGB test pattern useful for detecting RGB vs BGR issues.
smptebars: The smptebars source generates a color bars pattern, based on the SMPTE Engineering Guideline EG 1-1990.
smptehdbars: The smptehdbars source generates a color bars pattern, based on the SMPTE RP 219-2002.
testsrc: The testsrc source generates a test video pattern, showing a color pattern, a scrolling gradient and a timestamp.
testsrc2: The testsrc2 source is similar to testsrc, but supports more pixel formats instead of just rgb24.
yuvtestsrc: The yuvtestsrc source generates an YUV test pattern.
openclsrc: Generate video using an OpenCL program.
sierpinski: Generate a Sierpinski carpet/triangle fractal, and randomly pan around.
zoneplate: Generate a zoneplate test video pattern.

Multimedia

a3dscope: Convert input audio to 3d scope video output.
abitscope: Convert input audio to a video output, displaying the audio bit scope.
adrawgraph: Draw a graph using input audio metadata.
agraphmonitor: See graphmonitor.
ahistogram: Convert input audio to a video output, displaying the volume histogram.
aphasemeter: Measures phase of input audio, which is exported as metadata lavfi.
avectorscope: Convert input audio to a video output, representing the audio vector scope.
bench: Benchmark part of a filtergraph.
abench: Benchmark part of a filtergraph.
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.
latency: Measure filtering latency.
alatency: Measure filtering latency.
metadata: Manipulate frame metadata.
ametadata: Manipulate frame metadata.
perms: Set read/write permissions for the output frames.
aperms: Set read/write permissions for the output frames.
realtime: Slow down filtering to match real time approximately.
arealtime: Slow down filtering to match real time approximately.
segment: segment works on video frames, asegment on audio samples.
asegment: segment works on video frames, asegment on audio samples.
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.
setrange: Force color range for the output video frame.
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 Brown-Puckette constant Q transform algorithm with direct frequency domain coefficient calculation (but the transform itself is not really constant Q, instead the Q factor is actually variable/clamped), with musical tone scale, from E0 to D#10.
showcwt: Convert input audio to video output representing frequency spectrum using Continuous Wavelet Transform and Morlet wavelet.
showfreqs: Convert input audio to video output representing the audio power spectrum.
showspatial: Convert stereo input audio to a video output, representing the spatial relationship between two channels.
showspectrum: Convert input audio to a video output, representing the audio frequency spectrum.
showspectrumpic: Convert input audio to a single video frame, representing the audio frequency spectrum.
showvolume: Convert input audio volume to a video output.
showwaves: Convert input audio to a video output, representing the samples waves.
showwavespic: Convert input audio to a single video frame, representing the samples waves.
sidedata: Delete frame side data, or select frames based on it.
asidedata: Delete frame side data, or select frames based on it.
spectrumsynth: Synthesize audio from 2 input video spectrums, first input stream represents magnitude across time and second represents phase across time.
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.
amovie: This is the same as movie source, except it selects an audio stream by default.
avsynctest: Generate an Audio/Video Sync Test.
movie: Read audio and/or video stream(s) from a movie container.