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@jace jace/
Last active Sep 12, 2019

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

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ghost commented Apr 19, 2018

so nice . how about *.mkv videos? (without convertion...)

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