Closed Captioning

A Closed Captioning stream is a data stream hidden inside a video stream which represents the audio portion as text.

MPEG2 elementary video streams sometime have closed captioning data embedded in it as IEC-608. In such cases the MPEG2 Decoder generates two output streams: Video and Closed Captioning.

In addition, AVI and OGG container formats can have closed captioning data as a separate stream. For instance, an MPEG2 file with closed captioning is converted to an AVI format that will have three streams: Video, Audio and Closed Captioning.

Data Options

To enable the display of closed captioning data, use Leadtools.Multimedia.PlayCtrl.ToggleClosedCaptioning.
To enable the capture of closed captioning data, use Leadtools.Multimedia.CaptureCtrl.ToggleClosedCaptioning.
To preserve Closed Captioning data during conversion from one format to another, use Leadtools.Multimedia.ConvertCtrl.AllowedStreams to make sure the output format can accept Closed Captioning data.
To save decoded closed captioning data to file in either TEXT or SRT format, use Leadtools.Multimedia.ConvertCtrl.SetClosedCaptioningTargetFile(System.String,Leadtools.Multimedia.ClosedCaptioningFlags).