The documentation does not mention that using add/cycle to change the property is subject to --chapter-seek-threshold option, and the fact that a chapter number of -1 indicates a playback position before the start of the first chapter.
The documentation does not mention that using add/cycle to change the property is subject to --chapter-seek-threshold option, and the fact that a chapter number of -1 indicates a playback position before the start of the first chapter.