get Thumbnail
Returns a Thumbnail for the provided playback time. Supported thumbnail formats are
WebVttconfigured via SourceConfig.thumbnailTrackHLS
Image Media Playlistin the multivariant playlistDASH
Image Adaptation Setas specified in DASH-IF IOP
If a WebVtt thumbnail track is provided, any potential in-manifest thumbnails are ignored. WebVtt and HLS Image Media Playlist thumbnail tracks will start loading once loadingState transitions to LoadingState.Loading. DASH Image Adaptation Set thumbnails are available once the loadingState is LoadingState.Loaded.
This function returns null
if the thumbnails were not loaded yet
if there are no thumbnails available in the source
if there is no thumbnail available at the provided time
Limitations
There is currently no event in place that signals when
WebVttand HLSImage Media Playlistthumbnails are loadedHLS
Image Media PlaylistandWebVttthumbnails are only supported for VoD sources