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Edit MKV Files

To remove audio or subtitle tracks from mkv files, the mkvmerge command can be used.

First, identify the track ids contained in the mkv file:

mkvmerge -i videofile.mkv

The output will look something like this:

kax i am at 6718
File 'videofile.mkv': container: Matroska
Track ID 0: audio (AC3/EAC3)
Track ID 1: subtitles (SubRip/SRT)
Track ID 2: subtitles (SubRip/SRT)
Track ID 3: video (MPEG-4p10/AVC/h.264)
Track ID 4: audio (DTS)
Chapters: 17 entries
Tags for track ID 0: 7 entries
Tags for track ID 1: 7 entries
Tags for track ID 2: 7 entries
Tags for track ID 3: 7 entries
Tags for track ID 4: 7 entries

To create a new mkv file with the subtitles removed and only keeping the second audio stream, use the following command:

mkvmerge -o newvideofile.mkv -a 4 -s 0 videofile.mkv