Sending a live streaming with 8 live subtitles to akamai in multibitrate HLS ...

Hello,

I’m trying to send a multibitrate hls stream with 8 live subtitles to akamai (hls ingest).

I have a special module to inject live subtitles in a video input.as onTextData.

All is fine until i set up the stream targets : i can send my different video qualities without any problem … but i can’t send my subtitiles.

I can generate a HLS stream from wowza (using smil file) with subs in webvtt format but i can’t find a way to send those webvtt files to akamai.

Is there a way or is it not possible ?