Creates a subtitle based on the subtitle at the specified index and adds it to the collection, inserting it right after that index.
True if the subtitle could be added, false otherwise.
The newly created subtitle's times will be based on the specified subtitle. Its start time will be the start time of the existing subtitle plus MinTimeBetweenSubtitles. Its duration will be MaxSingleLineSubtitleDuration.
SubtitleCollection Class | SubLib Namespace