29 lines
481 B
Bash
29 lines
481 B
Bash
#!/bin/bash
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for i in *.m4a
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do
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echo "$i"
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dbvalue=$(ffmpeg -i "$i" -af "volumedetect" -vn -sn -dn -f null /dev/null 2>&1 | grep "max_volume" | tr -s ' ' '\n' | tail -n 2 | head -n 1)
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echo $dbvalue
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if [ "$dbvalue" == "0.0" ]
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then
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echo "nothing to change..."
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else
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dbvaluechanged=$(echo $dbvalue | cut -c 2-)
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echo 'change '$dbvaluechanged'db'
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ffmpeg -i "$i" -af 'volume='$dbvaluechanged'dB' "new_$i" 2> /dev/null
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rm "$i"
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mv "new_$i" "$i"
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echo "replaced old file..."
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fi
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done
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