enable
Image Media Playlist thumbnails are not officially supported for live sources as the parsing is not optimised for dynamically updating manifests. If enableImageMediaPlaylistThumbnailParsingForLive is set to true, variant playlists for all EXT-X-IMAGE-STREAM-INF tags are downloaded and parsed anyway.
Activating this feature can have a severe impact on performance and should be used with caution.
Default is false.