+/**
+ * Chapter selection and enumeration, it is bound
+ * to a title option.
+ */
+
+/**
+ * Return the current video subtitle index, or
+ * \return NSNotFound if none is set.
+ *
+ * To disable subtitle pass NSNotFound.
+ */
+@property (readwrite) NSUInteger currentChapterIndex;
+- (void)previousChapter;
+- (void)nextChapter;
+- (NSArray *)chaptersForTitleIndex:(NSUInteger)titleIndex;
+
+/**
+ * Title selection and enumeration
+ * \return NSNotFound if none is set.
+ */
+@property (readwrite) NSUInteger currentTitleIndex;