add remind

libbluray.go

@@ -135,8 +135,8 @@ func (d *DBStruct) GetMainTitle() (uint32, error) {
 	return uint32(mainTitle), nil
 }
 
-// GetTitleInfo 从蓝光光盘获取标题信息 0为全部
-// GetTitleInfo Get title info from a Blu-ray disc 0 for all
+// GetTitleInfo 从蓝光光盘获取标题信息 需要先调用 GetTitles() 获取标题列表
+// GetTitleInfo Get title info from a Blu-ray disc. GetTitles() must be called first to get the title list
 func (d *DBStruct) GetTitleInfo(titleIdx uint32, angle uint) (*BlurayTitleInfo, error) {
 	cTitleInfo := C.bd_get_title_info(d.bd, C.uint32_t(titleIdx), C.uint(angle))
 	if cTitleInfo == nil {