ffmpeg:audio:audio_channels:change_audio_channels_-_stereo_to_mono
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ffmpeg - Audio - Audio Channels - Change Audio Channels - Stereo to Mono
Downmix both channels
ffmpeg -i "input.mkv" -ac 1 mono.mkv
WARNING: Any out of phase stereo will cancel out.
The following filtergraph can be used to bring out of phase stereo in phase prior to downmixing:
-af "asplit[a],aphasemeter=video=0,ametadata=select:key=lavfi.aphasemeter.phase:value=-0.005:function=less,pan=1c|c0=c0,aresample=async=1:first_pts=0,[a]amix"
ffmpeg/audio/audio_channels/change_audio_channels_-_stereo_to_mono.1742947306.txt.gz · Last modified: 2025/03/26 00:01 by peter