Discovers sidecar text tracks from a DASH manifest.
Considers an <AdaptationSet> to carry text when one of:
contentType="text"
its mimeType, or that of one of its <Representation>s, starts with
text/ (e.g. text/vtt)
Within a text adaptation set, each <Representation> becomes one
TextTrackInfo. The BaseURL chain (MPD → Period → AdaptationSet →
Representation) is resolved against the supplied baseUrl.
Only sidecar (single-file) WebVTT renditions are surfaced. Segmented text
tracks (stpp/wvtt codecs) are ignored - they would require streaming
through MSE which the sidecar pipeline does not support.
Discovers sidecar text tracks from a DASH manifest.
Considers an
<AdaptationSet>to carry text when one of:contentType="text"mimeType, or that of one of its<Representation>s, starts withtext/(e.g.text/vtt)Within a text adaptation set, each
<Representation>becomes one TextTrackInfo. TheBaseURLchain (MPD → Period → AdaptationSet → Representation) is resolved against the suppliedbaseUrl.Only sidecar (single-file) WebVTT renditions are surfaced. Segmented text tracks (
stpp/wvttcodecs) are ignored - they would require streaming through MSE which the sidecar pipeline does not support.