Extract subtitles from .mkv files on Mac OS X

extract-subtitles-from-mkv.md

Extract Subtitles From mkv

Instuctions available (moved) at REMOTE ORIGIN website: Extract Subtitles From mkv

Extract subtitles from MKV on all subdirectories

extract_subtitles.py

from os import walk
import subprocess
import re
from os import path

tool_path = "/Applications/MKVToolNix-51.0.0.app/Contents/MacOS/"
dir = "./"

def find_files(dir, ext):
    file_list = []
    for (dirpath, dirnames, filenames) in walk(dir):
        for filename in filenames:
            if filename.endswith(ext) and not filename.startswith('._'):
                file_list.append(dirpath + '/' + filename)
    file_list.sort()
    return file_list

for file in find_files(dir, ".mkv"):
    basename = file.replace(".mkv", "")
    
    if path.exists(basename+".srt") or path.exists(basename+".ssa"):
        print("Already Exist, skipping...", basename)
        continue

    # Find subtitle track
    result = subprocess.run([tool_path + "mkvmerge", "-i", file], stdout=subprocess.PIPE, check=True)
    
    # SubRip .srt
    srt_track = re.search(r'Track ID (\d+): subtitles \(SubRip/SRT\)', str(result.stdout)) 
    if srt_track:
        srt_track = "{}:{}.{}".format(srt_track.group(1), basename, "srt")

    # SubStation Alpha .ssa
    ssa_track = re.search(r'Track ID (\d+): subtitles \(SubStationAlpha\)', str(result.stdout)) 
    if ssa_track:
        ssa_track = "{}:{}.{}".format(ssa_track.group(1), basename, "ssa")

    if not srt_track and not ssa_track:
        print('No SRT track found!', file, str(result.stdout))
        continue


    # Extract SRT
    subprocess.run(list(filter(None, [tool_path+"mkvextract", "tracks", file, srt_track, ssa_track])), check=True)

print("Finished!");

then run on terminal like:

python3 extract_subtitles.py

same issue exactly with an srt file of over 10MB with binary data.
SAD!

There's a Mac application called Subtitle Extractor in the App Store that does this

Thank you for this @larryy ! I needed an SRT to translate subtitles into another language and needed precise time codes, this app does it!

For SRT it is ok but for SUP like Japanese and Chinese, seems OCR is needed.

Thank you so much, it worked !!

Thanks a lot!

Very simple and work, it's really work well. Thank you very much