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dotfiles/dotfiles/bin/embed-subtitles

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#!/usr/bin/env bash
# Adds subtitles to a video. You can pass multiple srt files in one go. This
# preserves all existing streams, so if you've already added subtitle tracks to
# the video then these new ones will be appended. I haven't extensively tested
# appending yet (not sure if the mapping arg is correct), so I recommend adding
# all of your tracks in one go.
if which tput >/dev/null 2>&1; then
ncolors=$(tput colors)
fi
if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then
RED="$(tput setaf 1)"
GREEN="$(tput setaf 2)"
YELLOW="$(tput setaf 3)"
BLUE="$(tput setaf 4)"
MAGENTA="$(tput setaf 5)"
CYAN="$(tput setaf 6)"
BOLD="$(tput bold)"
NORMAL="$(tput sgr0)"
else
RED=""
GREEN=""
YELLOW=""
BLUE=""
MAGENTA=""
CYAN=""
BOLD=""
NORMAL=""
fi
filename=$(basename -- "$1")
extension="${filename##*.}"
filename="${filename%.*}"
output_name="$2"
output="${output_name}.$extension"
shift 2
subtitles=("$@")
if [[ $filename == "" || $output_name == "" || ${#subtitles[@]} -eq 0 ]]; then
printf "${BOLD}${RED}Usage: embed-subtitles <video filename> <output name> <subtitle filenames>${NORMAL}\n"
exit 1
fi
printf "\n${YELLOW}${BOLD}Adding subtitles to $filename.$extension | output: $output${NORMAL}\n"
mapping="-map 0"
tracks=""
map_index=1
for track in "$@"; do
tracks+="-i \"$track\" "
mapping+=" -map $map_index"
map_index=$((map_index+1))
done
cmd="ffmpeg -i \"$filename.$extension\" $tracks $mapping -c copy -c:s mov_text \"$output\""
printf "\n${BOLD}Running: $cmd\n\n${NORMAL}"
eval $cmd
printf "\n${GREEN}${BOLD}Done adding subtitles to $filename.$extension | output: $output\n${NORMAL}"