How do I NOT display webvtt listed in mpd as caption?

Created by: ddhp

Hello there!

We are trying to list a text/vtt adaptation inside mpd, and do not want it to be displayed as caption, it's more like a metadata instead.

And we found out that dash.js treats mimeType: text/vtt adaptation as a caption kind, if it's role is not set to caption or subtitle.

ref: src/streaming/TextSourceBuffer.js:152

var trackKindMap = { subtitle: 'subtitles', caption: 'captions' };
var getKind = function () {
                var kind = (mediaInfo.roles.length > 0) ? trackKindMap[mediaInfo.roles[0]] : trackKindMap.caption;
                kind = (kind === trackKindMap.caption || kind === trackKindMap.subtitle) ? kind : trackKindMap.caption;
                return kind;
            };

Can we add metadata inside trackKindMap?

Thanks!