Audio Filters Reference

ffmpeg -i input.mp3 -af "volume=0.5,aecho=0.8:0.9:1000:0.3" output.mp3

# Reduce volume by 50%
ffmpeg -i input.mp3 -af volume=0.5 output.mp3

# Increase volume by 10dB
ffmpeg -i input.mp3 -af volume=10dB output.mp3

# Dynamic volume based on timestamp
ffmpeg -i input.mp3 -af "volume='if(lt(t,10),0.5,1.0)':eval=frame" output.mp3

# Basic compression
ffmpeg -i input.wav -af compand output.wav

# Custom compression curve
ffmpeg -i input.wav -af "compand=0.3|0.3:1|1:-90/-60|-60/-40|-40/-30|-20/-20:6:0:-90:0.2" output.wav

# Normalize to -16 LUFS
ffmpeg -i input.mp3 -af loudnorm=I=-16:LRA=11:TP=-1.5 output.mp3

# Two-pass normalization
ffmpeg -i input.mp3 -af loudnorm=print_format=json -f null -

ffmpeg -i input.wav -af alimiter=limit=0.5:attack=5:release=50 output.wav

ffmpeg -i input.wav -af acompressor=threshold=-20dB:ratio=4:attack=5:release=50 output.wav

ffmpeg -i input.wav -af adrc output.wav

# Boost 1kHz by 10dB
ffmpeg -i input.mp3 -af equalizer=f=1000:width_type=h:width=200:g=10 output.mp3

# Bass boost
ffmpeg -i input.mp3 -af bass=g=10:f=100:w=0.5 output.mp3

# High-pass filter at 200Hz
ffmpeg -i input.mp3 -af highpass=f=200 output.mp3

# Low-pass filter at 3000Hz
ffmpeg -i input.mp3 -af lowpass=f=3000 output.mp3

ffmpeg -i input.mp3 -af anequalizer="c0 f=1000 w=100 g=-10 | c1 f=2000 w=200 g=5" output.mp3

ffmpeg -i input.mp3 -af firequalizer=gain='if(lt(f,1000),0,10)' output.mp3

ffmpeg -i input.wav -af aiir=z="1 -2 1":p="1 -0.9 0.81" output.wav

# Single echo at 1 second
ffmpeg -i input.mp3 -af aecho=0.8:0.9:1000:0.3 output.mp3

# Multiple echoes
ffmpeg -i input.mp3 -af aecho=0.8:0.88:60|180|1000:0.4|0.3|0.2 output.mp3

ffmpeg -i input.wav -i impulse.wav -lavfi afir output.wav

ffmpeg -i input.mp3 -af aphaser=in_gain=0.4:out_gain=0.74:delay=3:decay=0.4:speed=0.5 output.mp3

ffmpeg -i input.mp3 -af flanger output.mp3

ffmpeg -i input.mp3 -af chorus=0.5:0.9:50|60|40:0.4|0.32|0.3:0.25|0.4|0.3:2|2.3|1.3 output.mp3

ffmpeg -i input.mp3 -af tremolo=f=5:d=0.5 output.mp3

ffmpeg -i input.mp3 -af vibrato=f=5:d=0.5 output.mp3

ffmpeg -i noisy.wav -af afftdn=nf=-25 output.wav

ffmpeg -i noisy.wav -af anlmdn output.wav

ffmpeg -i noisy.wav -af arnndn=model=model.rnnn output.wav

ffmpeg -i noisy.wav -af afwtdn output.wav

ffmpeg -i audio.wav -af adeclick output.wav
ffmpeg -i audio.wav -af adeclip output.wav

ffmpeg -i music.mp3 -i voice.mp3 -filter_complex "[0:a][1:a]amix=inputs=2:duration=longest" output.mp3

ffmpeg -i left.wav -i right.wav -filter_complex "[0:a][1:a]amerge=inputs=2" stereo.wav

# Stereo to mono
ffmpeg -i stereo.mp3 -af pan="mono|c0=0.5*c0+0.5*c1" mono.mp3

# Swap left and right
ffmpeg -i input.mp3 -af pan="stereo|c0=c1|c1=c0" output.mp3

ffmpeg -i stereo.wav -filter_complex "channelsplit" -map 0:0 left.wav -map 0:1 right.wav

ffmpeg -i input.wav -af channelmap=0-FL|1-FR output.wav

ffmpeg -i left.wav -i right.wav -filter_complex "[0:a][1:a]join=inputs=2:channel_layout=stereo" stereo.wav

# Delay by 1 second
ffmpeg -i input.mp3 -af adelay=1000|1000 output.mp3

# Delay right channel by 100ms
ffmpeg -i stereo.mp3 -af adelay=0|100 output.mp3

# Speed up by 1.5x
ffmpeg -i input.mp3 -af atempo=1.5 output.mp3

# Slow down by 0.5x
ffmpeg -i input.mp3 -af atempo=0.5 output.mp3

ffmpeg -i input.mp3 -af asetrate=44100*1.5,aresample=44100 output.mp3

ffmpeg -i input.wav -af aresample=48000 output.wav

ffmpeg -i input.mp3 -af astats -f null -

ffmpeg -i input.mp3 -af volumedetect -f null -

ffmpeg -i input.mp3 -af silencedetect=n=-50dB:d=1 -f null -

ffmpeg -i input.mp3 -af ebur128=peak=true -f null -

ffmpeg -i input.mp3 -af aspectralstats -f null -

ffmpeg -i input.wav -af aformat=sample_fmts=s16:channel_layouts=stereo output.wav

ffmpeg -i input.wav -af aresample=48000 output.wav