Convert MKV to SUB

Understanding MKV and SUB file formats

MKV (Matroska Video) is a popular multimedia container format that can hold video, audio, and subtitle tracks in a single file. It is widely used for storing movies and TV shows with multiple audio and subtitle options.

SUB files are subtitle files, often used in conjunction with video files to display subtitles during playback. The SUB format can refer to different types, but most commonly it is a text-based or image-based subtitle file that works alongside a video file.

Why convert MKV to SUB?

Converting MKV to SUB is useful when you want to extract subtitle tracks from an MKV video for use with other media players or to edit the subtitles separately. This process does not convert video, but rather extracts the embedded subtitle stream into a standalone SUB file.

How to convert MKV to SUB

To extract subtitles from an MKV file and save them as a SUB file, you need a tool that can demux (separate) the subtitle track. Here are the steps using the recommended software:

Best software: MKVToolNix

• Download and install MKVToolNix from the official website.
• Open MKVToolNix GUI.
• Click Add source files and select your MKV file.
• In the Tracks, chapters and tags section, uncheck all tracks except the subtitle track you want to extract.
• Click Output and choose the destination folder.
• Click Start multiplexing. The subtitle track will be saved as a separate file, usually in the original format (such as .sub or .srt).

Alternative: Subtitle Edit

• Open Subtitle Edit.
• Go to File → Import subtitle from Matroska (.mkv).
• Select the subtitle track and save it as a SUB file via File → Save as.

Tips for successful conversion

• Check the subtitle format after extraction. Some players require specific SUB formats (text-based or image-based).
• If you need to convert between subtitle formats (e.g., SRT to SUB), Subtitle Edit can help with that as well.
• Always verify the extracted subtitles by playing them with your video to ensure synchronization.