21 lines
969 B
Bash
21 lines
969 B
Bash
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# 1. extract audio from all videos (assuming .mp4 videos).
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for FILE in *.mp4; do ffmpeg -i $FILE ${FILE%%.mp4}.wav; done
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# 2. use the first second of the first audio file as the noise sample.
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sox `ls *.wav | head -1` -n trim 0 1 noiseprof noise.prof
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# Replace with a specific noise sample file if the first second doesn't work for you:
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# sox noise.wav -n noiseprof noise.prof
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# 3. clean the audio with noise reduction and normalise filters.
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for FILE in *.wav; do sox -S --multi-threaded --buffer 131072 $FILE ${FILE%%.wav}.norm.wav noisered noise.prof 0.21 norm; done
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# 4. re-insert audio into the videos.
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# If you need to include an audio offset (+/- n seconds), add parameter "-itsoffset n" after the second -i parameter.
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for FILE in *.norm.wav; do ffmpeg -i ${FILE%%.norm.wav}.mp4 -i $FILE -c:v copy -c:a aac -strict experimental -map 0:v:0 -map 1:a:0 ${FILE%%.norm.wav}.sync.mp4; done
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# 5. Remove artefacts
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rm -f *.wav noise.prof
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# 6. That's it. You're done!
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