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Flip audio phase shift
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ffmpeg -i input_file -af pan="stereo| c0=c0| c1=-1*c1" output_file
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This command inverses the audio phase of the second channel by shifting it 180°.
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+ - ffmpeg
- starts the command
+ - -i input file
- path, name and extension of the input file
+ - -af
- specifies that the next section should be interpreted as an audio filter
+ - pan=
- tell the quoted text below to use the pan filter
+ - "stereo| c0=c0| c1=-1*c1"
- maps the output's first channel (c0) to the input's first channel and the output's second channel (c1) to the inverse of the input's second channel
+ - output file
- path, name and extension of the output file
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