Adding or "burning" physical text or a watermark onto the video frame itself.
Creating a written transcript or document of the audio contained within the MKV file. AgADUgkAAoP4iFY.mkv
The request "create text: AgADUgkAAoP4iFY.mkv" can mean a few different things depending on what you're trying to do with that specific video file: Adding or "burning" physical text or a watermark
Generating a subtitle file (like .srt or .vtt) to go along with the video. AgADUgkAAoP4iFY.mkv
Creating a text-based chapter list or editing the file's internal metadata.
Could you please clarify which of these you are looking for? MKV to Text Online Converter - Any2Text