A simple script to beautify and improve readability of .ass subtitles and converting subtitles .srt <=> .ass {\\bord3} - ASS subtitles outline width {\\blur14} - blur ratio (to create smooth transition between movie and subtitles)

subs.sh

#!/usr/bin/env sh
COMMAND=$1

case "$COMMAND" in
  ass-outline)
    # Add outline to all ASS subtitles in current directory
    for file in *.ass; do
      echo "$COMMAND: Processing $file"
      perl -pe 's/(^Dialogue: ([^{]*?,){9})(?=[^{])/\1\{\\bord3}\{\\blur14}/g' <"$file" >temp
      mv temp "$file"
    done
    echo "$COMMAND: Finalizing"
    sed -E 's/^(Style: sp_.+),[0-9]+,([0-9]+\r?)$/\1,0,\2/g' -i ./*.ass
    sed -E 's/^(Style: Default.+),[0-9]+,([0-9]+\r?)$/\1,0,\2/g' -i ./*.ass
    ;;
  ass-to-srt)
    # Convert all ASS subtitles in current directory to SRT (use to fix broken subtitles or prepare subtitles for tablet)
    for file in *.ass; do
      echo "$COMMAND: Processing $file"
      ffmpeg -i "$file" "$(basename "$file" ass)srt"
    done
    ;;
  srt-to-ass)
    # Convert all SRT subtitles in current directory to ASS (use before $0 ass-outline)
    for file in *.srt; do
      echo "$COMMAND: Processing $file"
      ffmpeg -i "$file" "$(basename "$file" srt)ass"
    done
    ;;
  *)
    echo "Usage: $(basename "$0") {command}"
    echo " Commands:"
    echo "  ass-outline: Add outline to all ASS subtitles in current directory"
    echo "  ass-to-srt:  Convert all ASS subtitles in current directory to SRT (use to fix broken subtitles or prepare subtitles for MiPad4)"
    echo "  srt-to-ass:  Convert all SRT subtitles in current directory to ASS (use before $(basename "$0") ass-outline)"
    exit 1
    ;;
esac