$flanger

[piotrek117studos]

https://ffmpeg.org/ffmpeg-filters.html#flanger

Apply a flanging effect to the audio.

The filter accepts the following options:

delay
Set base delay in milliseconds. Range from 0 to 30. Default value is 0.

depth
Set added sweep delay in milliseconds. Range from 0 to 10. Default value is 2.

regen
Set percentage regeneration (delayed signal feedback). Range from -95 to 95. Default value is 0.

width
Set percentage of delayed signal mixed with original. Range from 0 to 100. Default value is 71.

speed
Set sweeps per second (Hz). Range from 0.1 to 10. Default value is 0.5.

shape
Set swept wave shape, can be triangular or sinusoidal. Default value is sinusoidal.

phase
Set swept wave percentage-shift for multi channel. Range from 0 to 100. Default value is 25.

interp
Set delay-line interpolation, linear or quadratic. Default is linear.

[machineonamission]

the hell is a flanging effect? can you send an example?

[piotrek117studos]

Uploading rlanger.mp4…

[piotrek117studos]

rlanger.mp4

[machineonamission]

Hmm that's an interesting effect with plenty of meme potential, I'll give it a look.