Created
September 3, 2020 10:22
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Windows FFmpeg | Downmix stereo to mono audio in a video file
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| @echo off | |
| :: Drag the video file onto this file to downmix | |
| rem Extract stereo stream | |
| ffmpeg -i "%~1" -vn -acodec copy "%~1.stereo.aac" -y | |
| rem Downmix stereo to mono | |
| ffmpeg -i "%~1.stereo.aac" -ac 1 "%~1.mono.aac" -y | |
| rem Replace stereo stream with mono stream | |
| ffmpeg -i "%~1" -i "%~1.mono.aac" -c:v copy -map 0:v:0 -map 1:a:0 "%~p1%~n1.mono%~x1" | |
| del "%~1.stereo.aac" | |
| del "%~1.mono.aac" |
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