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ffmpeg audio cheatsheet
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| # extract single audio stream video from multiple streamed video | |
| ffmpeg -i input.mp4 -c:v copy -c:a copy -map 0:v -map 0:a:2 output.mp4 |
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| # Downmix 5.1 to 2ch | |
| ffmpeg -i input.mp4 -c:v copy -c:a copy -ac 2 output.mp4 | |
| # Front Left & Right:30%, Back Left & Right:30% | |
| ffmpeg -i input.mp4 -c:v copy -c:a copy -ac 2 -af "pan=stereo|FL=FC+0.30*FL+0.30*BL|FR=FC+0.30*FR+0.30*BR" output.mp4 |
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