matching #GstDiscovererStreamInfo. The caller should free it with [gstpbutils.discoverer_stream_info.DiscovererStreamInfo.listFree].
DiscovererInfo.getSubtitleStreams
gstpbutils.discoverer_subtitle_info.DiscovererSubtitleInfo[] getSubtitleStreams()Finds all the #GstDiscovererSubtitleInfo contained in info
Returns
A #GList of