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#!/bin/bash
set -xeuo pipefail
find 2* -type f | while read file
do
dest=waveforms/`cut -d. -f1 <<<$file`.png
mkdir -p `rev <<<$dest | cut -d/ -f2- | rev`
[ ! -s $dest ] && ffmpeg -i $file -filter_complex compand,showwavespic=s=16384x768,crop=h=ih/3 -frames:v 1 $dest <<<"" # na začetek filtra lahko daš compand, za dynamic range kompresor
done
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