The VideoLAN Forums

Does VLC (should) support TTML subtitles format ([stpp]) ?
It is not quite clear for me after reading the sources and the forum.

Yes

which decoder modules?
does avformat support it?
PS: my subtitles streams are in [sbtt] and [stpp] boxes.

which decoder modules?
does avformat support it?
PS: my subtitles streams are in [sbtt] and [stpp] boxes.

where is sbtt registered ?

Yep, I see no sbtt footprints. (Why?)
And what about stpp ?

I see, that TTML is supported for loading from (xml) file.
But what about TTML from mp4 file track? - This should be implemented in another module or not?

Does VLC support TTML styling, especially text outline? I tried to run TTML subtitles with some styling. But unfortunately, it doesn't work for me. I repeated an example from TTML documentation. But it also doesn't work.