For one file I know I can (being my video and sub files in the same directory):
mkvmerge -o output-file.mkv --default-track 0 --language 0:es subtitle-file.ass video-file.mkv
But how can I do the same for 50 files. My video and subtitle files name are the same:
video-1.mkv
video-2.mkv
video-3.mkv
video-1.ass
video-2.ass
video-3.ass
And my output file should be something like video-1-sub-mkv, video-2-sub-mkv, etc.