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FancyFilteringExamples

Fancy Filtering Examples

Video

cellauto

cellauto image

ffplay -f lavfi -i cellauto=rule=110

Other interesting cellauto rule values: 9, 18, 22, 26, 30, 41, 45, 50, 54, 60, 62, 73, 75, 77, 82, 86, 89, 90, 97, 99, 101, 102, 105, 107, 109, 110 (default), 124, 126, 129, 131, 133, 135, 137, 145, 146, 149, 150, 151, 153, 154, 161, 167, 169, 181, 182, 183, 193, 195, 210, 218, 225.

life

life image

ffplay -f lavfi -i life=s=300x200:mold=10:r=60:ratio=0.1:death_color=#C83232:life_color=#00ff00,scale=1200:800:flags=16

Second example for life filter (blue & blur)

ffplay -f lavfi -i life=s=640x480:mold=10:r=100:ratio=0.1:death_color=blue:life_color=#00ff00,boxblur=2:2

mandelbrot

mandelbrot image

ffplay -f lavfi -i mandelbrot

mirror effect

Mirror effect with lavfi

ffplay -i INPUT -vf "crop=iw/2:ih:0:0,split[left][tmp];[tmp]hflip[right];[left][right] hstack"

video channel separation effect with lut filter

RGB version original image plus images of the separations of the R, G, and B channels

ffplay -f lavfi -i testsrc -vf "split=4[a][b][c][d];[b]lutrgb=g=0:b=0[x];[c]lutrgb=r=0:b=0[y];[d]lutrgb=r=0:g=0[z];[a][x][y][z]hstack=4"

YUV version original image plus images of the separations of the Y, U, and V channels

ffplay -f lavfi -i testsrc -vf "split=4[a][b][c][d];[b]lutyuv=u=128:v=128[x];[c]lutyuv=y=0:v=128[y];[d]lutyuv=y=0:u=128[z];[a][x][y][z]hstack=4"

histogram & waveform

ffplay -f lavfi -i mandelbrot -vf "format=gbrp,split=4[a][b][c][d],[d]histogram=display_mode=0:level_height=244[dd],[a]waveform=m=1:d=0:r=0:c=7[aa],[b]waveform=m=0:d=0:r=0:c=7[bb],[c][aa]vstack[V],[bb][dd]vstack[V2],[V][V2]hstack"

vectorscope & waveforms

ffplay -f lavfi -i mandelbrot -vf "format=yuv444p,split=4[a][b][c][d],[a]waveform[aa],[b][aa]vstack[V],[c]waveform=m=0[cc],[d]vectorscope=color4[dd],[cc][dd]vstack[V2],[V][V2]hstack"

waveform

Split the waveform filter to show broadcast range of the waveform (y values between 16 and 235) in green and out of broadcast range in red.

ffplay -i http://download.blender.org/peach/bigbuckbunny_movies/big_buck_bunny_480p_surround-fix.avi  -vf "split[a][b];[a]format=gray,waveform,split[c][d];[b]pad=iw:ih+256[padded];[c]geq=g=1:b=1[red];[d]geq=r=1:b=1,crop=in_w:220:0:16[mid];[red][mid]overlay=0:16[wave];[padded][wave]overlay=0:H-h"

waveform with envelope

Split the waveform filter to show broadcast range of the waveform (y values between 16 and 235) in green and out of broadcast range in red and also use envelope.

ffplay ~/matrixbench_mpeg2.mpg -vf "split[a][b];[a]waveform=e=3,split=3[c][d][e];[e]crop=in_w:20:0:235,lutyuv=v=180[low];[c]crop=in_w:16:0:0,lutyuv=y=val:v=180[high];[d]crop=in_w:220:0:16,lutyuv=v=110[mid] ; [b][high][mid][low]vstack=4"

more waveforms and vectorscope

datascope

Audio

aevalsrc

Making some random "musical" keys:

% cat expr
# floor(t): 0 0 0 0 0 ... 1 1 1 1 1 ... 2 2 2 2 2
#  => set a random key when floor(t) changes
if(eq(floor(t),ld(2)),
    st(0,random(4)*3000+1000));

# the next value to compare floor(t) with
st(2,floor(t)+1);

# mod(t,1) makes t always in the range [0;1) for each key
st(1,mod(t,1));

# 0.6*... + 0.4*... for "echo" effect
# exp() to mitigate the sound according to the time
(0.6*sin(1*ld(0)*ld(1))+
 0.4*sin(2*ld(0)*ld(1)))*exp(-4*ld(1))

And to test it:

ffplay -f lavfi -i "aevalsrc=$(grep -v '^#' expr|tr -d '\n'|sed 's/\([,;]\)/\\\1/g')"

showwaves and showspectrum

Given the audio file april.flac:

ffplay -f lavfi 'amovie=april.flac,asplit=3[out1][a][b]; [a]showwaves=s=640x240[waves]; [b]showspectrum=s=640x240[spectrum]; [waves][spectrum] vstack[out0]'

FFplay with showwaves and showspectrum

showspectrum

Given the multichannel audio file tearsofsteel-surround.flac:

ffplay -f lavfi 'amovie=tearsofsteel-surround.flac,asplit=2[out1][a]; [a]showspectrum=color=channel:scale=cbrt:orientation=vertical:overlap=1:s=2048x1024[out0]'

Now with different colors and scaling:

ffplay -f lavfi 'amovie=tearsofsteel-surround.flac,asplit=2[out1][a]; [a]showspectrum=color=fire:scale=log:orientation=vertical:overlap=1:s=1024x1024[out0]'

avectorscope

Given the audio file input.flac:

ffplay -f lavfi 'amovie=input.flac,asplit=2[out1][a],[a]avectorscope=m=polar:s=800x400[out0]'

showcqt

Given the audio file input.flac:

ffplay -f lavfi 'amovie=input.flac,asplit=2[out1][a],[a]showcqt[out0]'

showspectrumpic

Given the audio file input.flac:

ffmpeg -i input.flac -lavfi showspectrumpic=s=hd720 out.jpg

Last modified 5 months ago Last modified on Aug 8, 2016, 12:39:11 PM

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