Closed Captioning

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

Sometimes MPEG2 elementary video streams have closed captioning data embedded in it, such 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

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