├── README.md
└── noiseclean.sh


/README.md:
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 1 | # noiseclean
 2 | 
 3 | A simple bash script to remove audio noise from audio and video files.
 4 | 
 5 | ## Requirements
 6 | - [ffmpeg](http://sox.sourceforge.net/)
 7 | - [sox](http://sox.sourceforge.net/)
 8 | 
 9 | ## Usage example:
10 | ```bash
11 | $ ./noiseclean.sh intro.mp4 intro_cleaned.mp4
12 | Detected 'intro.mp4' as a video file
13 | Sample noise start time [00:00:00]:
14 | Sample noise end time [00:00:00.500]:
15 | Noise reduction amount [0.21]:
16 | Cleaning noise on 'intro.mp4'...
17 | Done
18 | ```
19 | 
20 | Based on: http://www.zoharbabin.com/how-to-do-noise-reduction-using-ffmpeg-and-sox/
21 | 


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/noiseclean.sh:
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 1 | #!/usr/bin/env bash
 2 | 
 3 | usage ()
 4 | {
 5 |     echo 'Usage : noiseclean.sh <input video file> <output video file>'
 6 |     exit
 7 | }
 8 | 
 9 | # Tests for requirements
10 | ffmpeg -version >/dev/null || { echo >&2 "We require 'ffmpeg' but it's not installed. Install it by 'sudo apt-get install ffmpeg' Aborting."; exit 1; }
11 | sox --version >/dev/null || { echo >&2 "We require 'sox' but it's not installed. Install it by 'sudo apt-get install sox' Aborting."; exit 1; }
12 | 
13 | if [ "$#" -ne 2 ]
14 | then
15 |   usage
16 | fi
17 | 
18 | if [ ! -e "$1" ]
19 | then
20 |     echo "File not found: '$1'"
21 |     exit
22 | fi
23 | 
24 | if [ -e "$2" ]
25 | then
26 |     read -p "File '$2' already exists, overwrite? [y/N]: " yn
27 |     case $yn in
28 |         [Yy]* ) break;;
29 |         * ) exit;;
30 |     esac
31 | fi
32 | 
33 | inBasename=$(basename "$1")
34 | inExt="${inBasename##*.}"
35 | 
36 | isVideoStr=`ffprobe -v warning -show_streams "$1" | grep codec_type=video`
37 | if [[ ! -z $isVideoStr ]]
38 | then
39 |     isVideo=1
40 |     echo "Detected '$inBasename' as a video file"
41 | else
42 |     isVideo=0
43 |     echo "Detected '$inBasename' as an audio file"
44 | fi
45 | 
46 | read -p "Sample noise start time [00:00:00]: " sampleStart
47 | if [[ -z $sampleStart ]] ; then sampleStart="00:00:00"; fi
48 | read -p "Sample noise end time [00:00:00.500]: " sampleEnd
49 | if [[ -z $sampleEnd ]] ; then sampleEnd="00:00:00.500"; fi
50 | read -p "Noise reduction amount [0.21]: " sensitivity
51 | if [[ -z $sensitivity ]] ; then sensitivity="0.21"; fi
52 | 
53 | 
54 | tmpVidFile="/tmp/noiseclean_tmpvid.$inExt"
55 | tmpAudFile="/tmp/noiseclean_tmpaud.wav"
56 | noiseAudFile="/tmp/noiseclean_noiseaud.wav"
57 | noiseProfFile="/tmp/noiseclean_noise.prof"
58 | tmpAudCleanFile="/tmp/noiseclean_tmpaud-clean.wav"
59 | 
60 | echo "Cleaning noise on '$1'..."
61 | 
62 | if [ $isVideo -eq "1" ]; then
63 |     ffmpeg -v warning -y -i "$1" -qscale:v 0 -vcodec copy -an "$tmpVidFile"
64 |     ffmpeg -v warning -y -i "$1" -qscale:a 0 "$tmpAudFile"
65 | else
66 |     cp "$1" "$tmpAudFile"
67 | fi
68 | ffmpeg -v warning -y -i "$1" -vn -ss "$sampleStart" -t "$sampleEnd" "$noiseAudFile"
69 | sox "$noiseAudFile" -n noiseprof "$noiseProfFile"
70 | sox "$tmpAudFile" "$tmpAudCleanFile" noisered "$noiseProfFile" "$sensitivity"
71 | if [ $isVideo -eq "1" ]; then
72 |     ffmpeg -v warning -y -i "$tmpAudCleanFile" -i "$tmpVidFile" -vcodec copy -qscale:v 0 -qscale:a 0 "$2"
73 | else
74 |     cp "$tmpAudCleanFile" "$2"
75 | fi
76 | 
77 | echo "Done"
78 | 


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