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16 lines
431 B
Markdown
16 lines
431 B
Markdown
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---
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title: Downmixing audio channels
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tags:
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- Media
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emoji: 🎵
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link: https://trac.ffmpeg.org/wiki/AudioChannelManipulation
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---
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```bash
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ls -1 *.mp4 | xargs -I{} ffmpeg -y -i {} -ac 2 -c:v copy /path/to/out/{}
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```
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Downmixes multi-channel audio into stereo. Reduces the chances of weird things happening during playback.
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`-c:v copy` is important for performance as it means the video isn't re-encoded (10x improvement in speed).
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