today I read in Creating Optimized Versions that there should be an option to burn other subtitles then srt directly to the optimized file, but there is not described where and how to set the option. Do anybody now about this option and where to set it, I could not find anything.
Depending on which target profile was used when optimizing, subtitles will be already burned into the picture.
The smart TV profile is the only profile which may offer switchable (soft) subtitles. But only, if the subtitles were already available for the original (un-optimized) version of the video
And only if those subtitles were in a Text-based format (Srt).
All other optimizer profiles simply burn in the subtitle which is selected for this video (at the time when optimization was performed).