hlssink and textoverlay

[Baby Octopus]

textoverlay is nothing but buring the text on raw video, for which you need
to decode, burnin and then reencode. Without decoding it isn't possible

Another option as Nicolas suggested is to add metadata like subtitle. HLS
recommends WebVTT IIRC. You can try using *webvttenc* and insert the link of
this subtitle file in the HLS manifest file

~BO 



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