Filters:
aconvert         Convert the input audio to sample_fmt:channel_layout:packed_fmt.
aformat          Convert the input audio to one of the specified formats.
anull            Pass the source unchanged to the output.
aresample        Resample audio data.
ashowinfo        Show textual information for each audio frame.
asplit           Pass on the audio input to two outputs.
earwax           Widen the stereo image.
pan              Remix channels with coefficients (panning)
volume           Change input volume.
abuffer          Buffer audio frames, and make them accessible to the filterchain.
aevalsrc         Generate an audio signal generated by an expression.
amovie           Read audio from a movie source.
anullsrc         Null audio source, return empty audio frames.
abuffersink      Buffer audio frames, and make them available to the end of the filter graph.
anullsink        Do absolutely nothing with the input audio.
blackframe       Detect frames that are (almost) black.
boxblur          Blur the input.
copy             Copy the input video unchanged to the output.
crop             Crop the input video to width:height:x:y.
cropdetect       Auto-detect crop size.
delogo           Remove logo from input video.
deshake          Stabilize shaky video.
drawbox          Draw a colored box on the input video.
fade             Fade in/out input video
fieldorder       Set the field order.
fifo             Buffer input images and send them when they are requested.
format           Convert the input video to one of the specified pixel formats.
gradfun          Debands video quickly using gradients.
hflip            Horizontally flip the input video.
hqdn3d           Apply a High Quality 3D Denoiser.
lut              Compute and apply a lookup table to the RGB/YUV input video.
lutrgb           Compute and apply a lookup table to the RGB input video.
lutyuv           Compute and apply a lookup table to the YUV input video.
mp               libmpcodecs wrapper.
negate           Negate input video.
noformat         Force libavfilter not to use any of the specified pixel formats for the input to the next filter.
null             Pass the source unchanged to the output.
overlay          Overlay a video source on top of the input.
pad              Pad input image to width:height[:x:y[:color]] (default x and y: 0, default color: black).
pixdesctest      Test pixel format definitions.
scale            Scale the input video to width:height size and/or convert the image format.
select           Select frames to pass in output.
setdar           Set the frame display aspect ratio.
setpts           Set PTS for the output video frame.
setsar           Set the pixel sample aspect ratio.
settb            Set timebase for the output link.
showinfo         Show textual information for each video frame.
slicify          Pass the images of input video on to next video filter as multiple slices.
split            Pass on the input to two outputs.
thumbnail        Select the most representative frame in a given sequence of consecutive frames.
transpose        Transpose input video.
unsharp          Sharpen or blur the input video.
vflip            Flip the input video vertically.
yadif            Deinterlace the input image
cellauto         Create pattern generated by an elementary cellular automaton.
color            Provide an uniformly colored input, syntax is: [color[:size[:rate]]]
life             Create life.
mandelbrot       Mandelbrot fractal renderer
movie            Read from a movie source.
mptestsrc        Generate various test pattern.
nullsrc          Null video source, return unprocessed video frames.
rgbtestsrc       Generate RGB test pattern.
testsrc          Generate test pattern.
buffersink       Buffer video frames, and make them available to the end of the filter graph.
nullsink         Do absolutely nothing with the input video.
buffer           Buffer video frames, and make them accessible to the filterchain.
