Increase volume of podcasts

normalise-podcasts.sh

#!/bin/sh

INPUTDIR="/home/tripu/gPodder/Downloads/"
PREFIXLENGTH=6
OUTPUTDIR=/home/tripu/t/personal/podcasts/
GAIN=2.5

find "$INPUTDIR" -regextype egrep -iregex '.+\.mp3$' | while read f; do
  SHORT=$(echo $f | cut -d'/' -f"$PREFIXLENGTH"-)
  echo -n "$SHORT… "
  OUT=$(basename "$f")

  if [ -f "$OUTPUTDIR""$OUT" ]; then
    echo —
  else
    # ffmpeg -loglevel quiet -map_metadata 0 -i "$f" -af "volume=$GAIN" "$OUTPUTDIR""$OUT" > /dev/null 2>&1 && echo ✓ || echo ☹
    ffmpeg -loglevel quiet -map_metadata 0 -i "$f" -af "volume=$GAIN" "$OUTPUTDIR""$OUT" && echo ✓ || echo ☹
  fi

done