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codekitty
Asked: 2018-06-19 01:23:11 +0800 CST

How do I add mix in audio from one file to a another

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I'm trying to add background audio to a primary wav file. 

sox -m primary.wav background.wav output.wav

I have about 5s of background chatter in background.wav and I'd like the output to always be at the length of primary. How can I make sox loop and trim background.wav to the length of primary for mixing in shell?

sound sox

1 Answers

  1. Best Answer

    ffmpeg does it very well. For example:

    ffmpeg -i input1.mp3 -i input2.mp3 -filter_complex amerge -ac 2 -c:a libmp3lame -q:a 4 output.mp3

    See the FFmpeg manual for Manipulating audio channels

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