Process MKV files

Wed, Aug 22, 2018 02:00 CEST

Tags: Video

Here is a list of things you might want to do once you get your hands on a MKV file.

Transcode the soundtrack to some other format

for x in *.mkv
    ffmpeg -i $x -c:v copy -c:a aac $x.mp4
end

Extract a subtitle track

mkvmerge -i file.mkv
mkvextract tracks file.mkv 1:file-en.srt

VOBSUB to SRT

Given you just extracted a file.idx and file.sub file pair and have vobsub2srt installed

vobsub2srt file

NB: For OCR to work, a per language package must be installed. For instance, for English:

pacman -S tesseract-data-eng

If your player only supports a limited set of encodings or there is a mismatch of encodings somewhere and you are satisfied with ASCII only output try:

iconv -f utf8 -t ascii//translit < before.srt > after.srt