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#!/bin/bash
# Please install 'libav-tools' for Ubuntu 14.04 onwards
# As ffmpeg is obsolete, it has been replaced by 'avconv'
# Instead of python script, a simple bash one is sufficient
# A beta release for noNoise-v2
# Usage example
# $ bash noNoise.sh noisyVideo.mp4 noise-reduction-factor
# noise-reduction-factor: 0 means no reduction, 1 means
# maximum damping of noise (recommended is 0.2 to 0.4)
# Making a backup of the original video
echo "Back up original video at /tmp/orig_$1"
cp -v $1 /tmp/orig_$1
# Extracting audio from noisyVideo
avconv -i $1 -f wav -ab 192000 -vn /tmp/noisy.wav
# Creating a noise profile, basically looking for white noise
# in 0 to 0.5 sec of the clip (change if you like)
sox /tmp/noisy.wav -n trim 0 0.5 noiseprof myprofile
# Removing noise using noise profile
sox /tmp/noisy.wav /tmp/noisefree.wav noisered myprofile $2
# Replacing noisyAudio with noisefree audio in original video
avconv -i $1 -i /tmp/noisefree.wav -c:v copy -c:a aac -strict experimental -map 0:v:0 -map 1:a:0 noisefree_$1.mp4
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