Enum DVDSubPictureType

Namespace

VisioForge.Core.Types.MediaInfo

Assembly

VisioForge.Core.dll

Specifies the type of content contained in a DVD subpicture stream.

public enum DVDSubPictureType

Fields

NotSpecified = 0

The subpicture type is not specified or unknown.

This value indicates that the DVD authoring did not specify the type of content in the subpicture stream, or the type could not be determined. Applications should handle these streams as generic overlay content.

Language = 1

The subpicture contains language-related content such as subtitles or captions.

Language-type subpictures are the most common type and typically contain: - Subtitles for foreign language dialogue - Closed captions for hearing-impaired viewers - Forced subtitles for non-native language segments in the main audio

When a subpicture is marked as Language type, the stream should have an associated language code (LCID) that identifies the language of the text content. This allows DVD players to automatically select appropriate subtitles based on user language preferences.

Other = 2

The subpicture contains non-language content such as graphics or special overlays.

Other-type subpictures may contain various types of graphical content: - Director's commentary indicators - Scene selection highlights - Easter egg indicators - Graphical overlays for special features - Karaoke timing graphics (though karaoke subtitles are usually Language type) - Production notes or trivia overlays

These subpictures are typically not associated with a specific language and may be displayed regardless of the user's language settings, depending on the DVD's programming.

Remarks

DVD subpictures are overlay graphics that can be displayed on top of the main video content. They are commonly used for subtitles, but can also contain other types of graphical information such as karaoke lyrics, menu highlights, or director's commentary indicators.

The subpicture type helps DVD players and applications determine how to handle and present the subpicture content to users. Language-type subpictures typically contain subtitles or closed captions in various languages, while other types might contain graphical overlays for special features.

DVD subpictures use run-length encoding (RLE) compression and support up to 4 colors with transparency levels. Each subpicture can be positioned anywhere on the screen and can be shown or hidden based on user preferences or DVD navigation commands.