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ffmpeg - burning subtitles onto mp4, such that they always show, and cannot be turned off

I have successfully create a command line that allows subtitles to be displayed, I can see them when I select the track number in VLC. What I would like is to burn the subtitles such that they always show when the mp4 is played by any player, and not provide the option to be turned off. All i need is a clue to pursue. does ffmpeg have an option to do this. Thanks.

question from:https://stackoverflow.com/questions/65912311/burning-subtitles-onto-mp4-such-that-they-always-show-and-cannot-be-turned-off

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Use the subtitles filter to make hardsubs (burnt-in subtitles).

Assuming you have a subtitles file named sub.srt:

ffmpeg -i input.mkv -vf "subtitles=sub.srt" output.mp4

Or if the subtitles are in input.mkv:

ffmpeg -i input.mkv -vf "subtitles=input.mkv" output.mp4

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