Thumbnails - I-Frames

This class can be used to display I-Frames from a stream, e.g. for display of thumbnails while seeking. The URL provided to the initialiser must point to a HLS playlist with I-Frames, otherwise the hasThumbnails function will return false and the view won’t render thumbnails. note: hasThumbnails will return false immediately after initalisation, even for a playlist that has I-Frames. This is because the playlist needs to first be downloaded and checked for I-Frames.