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ffmpeg -i output.wav -filter_complex "showwavespic=s=640x240:split_channels=1" -frames:v 1 output.png
ffmpeg -i in.wav \ -filter_complex "channelsplit=channel_layout=5.1[FL][FR][FC][LFE][BL][BR]" \ -map "[FL]" front_left.wav \ -map "[FR]" front_right.wav \ -map "[FC]" front_center.wav \ -map "[LFE]" lfe.wav \ -map "[BL]" back_left.wav \ -map "[BR]" back_right.wav
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