Extract subtitles track

extract_subtitles.sh

#!/bin/bash

f="$1"

IFS=$'\r\n'
filename="${f%.*}"
bf=$(basename "$filename")
options=()
moptions=()
for s in $(ffprobe "$f" -show_entries stream=index,codec_type,codec_name:stream_tags=language,title -of compact 2>/dev/null|grep "codec_type=subtitle"); do
    # stream|index=5|codec_type=subtitle|tag:language=jpn|tag:title=官方日文字幕
    stream=$(echo $s|grep -oP 'index=\d+'|grep -oP '\d+')
    lang=$(echo $s|grep -oP 'tag:language=.{3}'| cut -d= -f2)
    if [[ $lang == "chi" ]]; then
        if [[ ! -z $(echo "$s"|grep -P "(Traditional|繁)") ]]; then
            lang=cht
        else
            lang=chs
        fi
    fi
    if [[ ! -z "$lang" ]]; then
        lang=".$lang"
    fi
    title=$(echo $s|grep -oP "title=.+"|cut -d= -f2)
    if [[ ! -z "$title" ]]; then
        title=".$title"
    fi
    format=$(echo $s|grep -oP "codec_name=[^:|]+"|cut -d= -f2)
    if [[ ! -z $(echo $s|grep subrip) ]]; then
        format=srt
    elif [[ ! -z $(echo $s|grep hdmv_pgs_subtitle) ]]; then
        format=sup
    elif [[ ! -z $(echo $s|grep dvd_subtitle) ]]; then
        moptions+=("$stream:${bf}${title}${lang}.sub")
        continue
    else
        format=ass
    fi
    echo $s $stream $title $lang
    options+=(-map "0:$stream" -c copy "${bf}${title}${lang}.${format}")
done
if [[ ${#options[@]} -gt 0 ]]; then
    ffmpeg -i "$f" -y ${options[@]}
    echo "ffmpeg -i -y $f ${options[@]}"
fi
if [[ ${#moptions[@]} -gt 0 ]]; then
    mkvextract tracks "$f" ${moptions[@]}
    echo "mkvextract tracks $f ${moptions[@]}"
fi