Used to initialize a
SubtitleInfo object in a convenient way. The properties are writable at this point, and then become readonly in a final object.
You should not create this object manually. It is passed as a parameter to
+[SubtitleInfo infoWithURL:andBlock:] method.
- NSString * mimeType
The subtitle's mimeType.
- NSString * language
The subtitle's source language. The contents depend on the target device.
- NSString * label
A custom label that may be displayed by a device's media player.