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@Roman-Port

Roman-Port/gist:0f95f3739ee0bd5158ea4cd43c94e8f9

Created December 3, 2023 03:32
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FFMPEG Stereo Difference Split and Join
Raw
gistfile1.txt
Creates L+R and L-R channels:
ffmpeg -i test.wav -filter_complex "[0:a]channelsplit=channel_layout=stereo[l][r];[r]volume=volume=-1[ri];[l][ri]amix=inputs=2[diff];[0:a]channelsplit=channel_layout=stereo[l][r];[l][r]amix=inputs=2:weights=0.5[add]" -map "[add]" add.wav -map "[diff]" diff.wav
Merges L+R and L-R back into a stereo file, identical to the original input:
ffmpeg -i add.wav -i diff.wav -filter_complex "[1:a]volume=volume=-1[diffi];[0:a][1:a]amix=inputs=2[l];[0:a][diffi]amix=inputs=2[r];[l][r]join=inputs=2:channel_layout=stereo[outpre];[outpre]volume=volume=2[out]" -map "[out]" testout.wav
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