Newsgroups: gmane.comp.video.transcode.user Date: Sun, 29 Jan 2006 12:26:06 +0100
Newsgroups: gmane.comp.video.transcode.user Date: Sun, 29 Jan 2006 12:26:06 +0100
> P.S. Bonus question: will tcrequant preserve the NTSC closed-caption > data already in the file? It'd sure be nice...
Nope. CC is an extra stream (+id) that you would have to extract and mux back in, but there are no tools to do that (afaik).
Erik Slagter
http://www.hear-it.org/page.dsp?page=2907
Closed captioning of movies and TV shows provides access for hearing impaired viewers to the audio information that they would otherwise be excluded from. For people with hearing impairment several types of captioning are relevant.
Many TV stations provide closed captioning as an option for viewers of selected shows. The captions, shown as text on the screen, provide a transcription of the dialogue, much like subtitles provide a translation of foreign language movies on a text strip in the bottom of the picture.
Subtitles, however, usually provide less information than hearing impaired viewers need. Closed captioning provides additional information. Subtitles in a single box, usually at the bottom of the picture, are designed to help hearing people understand a foreign language film or show by translating spoken lines. Close captioning is more complex.
Closed captioning is a technology that delivers visual text to describe dialogue, background noise, and sound effects on television programming. In closed captioning, the spoken words and the descriptions of background noise and sound effects appear in boxes in different parts of the screen. It provides a critical link to news, entertainment, and information for deaf and hard of hearing viewers, enabling them to be part of the cultural mainstream of society.
Today, closed captioning is mostly available with television programming and on VCR and DVD versions of movies, although new digital technologies are making it increasingly possible in cinemas, on the internet and in electronic games, as well.
Closed captions are designed to assist severely hearing impaired or deaf viewers, while subtitles may be adequate for mildly hearing impaired viewers.
For specific information about the availability of closed captioning of movies, TV shows or DVDs, try contacting the cinema, TV station, DVD retailer or rental outlet.