Enum DVDAudioLangExt

Namespace

VisioForge.Core.Types.MediaInfo

Assembly

VisioForge.Core.dll

Defines language extension codes that identify special-purpose audio tracks on a DVD.

public enum DVDAudioLangExt

Fields

NotSpecified = 0

No special language extension is specified; this is a standard audio track.

This is the default value for regular audio tracks that contain the main program audio. Most audio tracks on a DVD will have this extension, indicating they're intended for normal playback without any special purpose or additional content.

Captions = 1

Audio track contains normal dialog plus additional narration for captions.

Caption audio tracks include the regular program audio plus a narrator reading on-screen text, captions, and titles. This helps viewers who cannot read the on-screen text or subtitles. It's different from descriptive audio as it focuses on reading text rather than describing visual elements. This feature is particularly useful for audiences with reading difficulties or visual impairments.

VisuallyImpaired = 2

Audio track contains descriptive narration for visually impaired viewers.

Descriptive audio (also called audio description or video description) includes the main program audio plus additional narration that describes important visual elements during pauses in dialog. The narrator describes actions, scenes, facial expressions, costumes, and other visual information that would otherwise be missed by visually impaired viewers. This is an important accessibility feature required by law in many jurisdictions.

DirectorComments1 = 3

First director's commentary track providing behind-the-scenes information.

Director commentary tracks typically feature the film's director (and sometimes other crew members) discussing the making of the film, creative decisions, technical challenges, and anecdotes from production. This is the primary commentary track when multiple commentaries are available. Commentary tracks are popular bonus features that provide insight into the filmmaking process.

DirectorComments2 = 4

Second director's commentary track or alternative commentary.

This indicates a secondary commentary track, which might feature different participants than the first commentary. For example, it could include actors, producers, writers, or technical crew. Some DVDs feature multiple commentary tracks to provide different perspectives on the same content. The specific participants and focus would be indicated in the DVD's menu system.

Remarks

Language extensions provide additional context about the purpose of an audio track beyond just its language. This allows DVD authors to include multiple audio tracks in the same language but serving different purposes. For example, a DVD might have an English main audio track, an English descriptive audio track for visually impaired viewers, and two English commentary tracks. The language extension helps players present these options clearly to users and enables accessibility features.