maybeAddThumbnailMetadata
fun maybeAddThumbnailMetadata(perTrackCues: SparseArray<MutableList<UpdatedMatroskaExtractor.MatroskaSeekMap.CuePointData>>, durationUs: Long, segmentContentPosition: Long, segmentContentSize: Long)(source)
Finds the best thumbnail timestamp from the cue points and adds it to the track's format as ThumbnailMetadata.