Closed Captioning

[Jeffersonian]

How can I put closed captioning in an audio file? Thanks.

[Jeffersonian]

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[schmeg]

Closed-captioning is of course technically more of a video thing. What do you want to do with the video? Quicktime has text functions, DVDs have subtitles, Final Cut to tape has other text options. Please be more specific and someone can probably help you out.

[Jeffersonian]

My DVD player reads closed captioning and performs several features based on the content of the cc. If I copy a DVD the closed captioning comes through fine, but I'd like to be able to add cc to commercial DVDs that don't already have it (by copying the DVD, adding the cc, then reburning). If anyone can help out I'd appreciate it. Sorry for not being more specific in my first post.

PS: I don't really even know what closed captioning is. I know it's like the little black bars that come up on TVs and stuff when the sound is muted, but what else is it used for?

[Jeffersonian]

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[Krevinek]

ffmpeg can grab subtitles in VOB files, as well as POSSIBLY in QT text tracks... (major can answer that one better than I)

On the note of what CC actually is, it was intended to allow those who are hard of hearing, or deaf, to watch television programs. CC and subtitles are heavily used today, because many people either like the text to help out in some of the noisy scenes or where the producers drowned out the actor's voices for the BGM or 'noise', which is pointless IMO.

Subtitles on DVDs are also popular for fans of foriegn titles where the dialogue is done in a language that they cannot comprehend without the aid of subtitles/CC.

[donpedro]

I believe that CC is part of video. Data are in some hidden line (signal) which is not displayed on TV and processor (or something) in TV will read it and display it on TV. This is US thinkg. In Europe they have somethink called "Teletext" that will display whole pages of text with information. Text is sended in those "hidden" lines (signal).

This is very amateur explanation and might be wrong, but I am too interesting to find more about CC and specialy how could I include it into my mpeg stream for my home video.

Closed Captions and Subtitles are not the same thing. PLease do not be confused about it.

[Jeffersonian]

I know the difference in closed captioning and subtitles (well...at least I know what subtitales are and I know cc is different). When commercial DVDs are copied the captioning stays with the video so that is cool, but I'd like to add closed captioning to my own movies or hollywood ones without closed captioning. Anyway... Thanks for the posts so far.

[donpedro]

Link to old post.... Never solved...

https://www.videohelp.com/forum/viewtopic.php?t=126407&highlight=

[jsnkc1]

A video signal is compiled up by many diffrent lines only some of which you can actually se on a standard television monitor, Closed Captioning is on line 21 of the video signal, there is also another line wich carries the macrovision signal, I believe it's line 22 and another that carries the time code (VITC-Vertical Interleave Time Code). In order to add closed captioning to a DVD you will need DVD authoring software wich will allow you to import the captioning file during the authoring stage. At this time the cheapest authoring program that will do that is Sonic's DVD Fusion, The system will run you around $18,000-$30,000 depending on which encoder card you go with. There is also another program that is around $400 that is supposed to be able to insert closed captioning on DVD's which the name eludes me at the moment, but you still need closed captioning software that will produce the Closed Captioning script (not just a text file like a lot of people think), and those systems aren't cheap either. You can, however, insert closed captioning in a MPEG-1 file by using some video editing software such as Vegas Video 4.

[Jeffersonian]

Hmm...sounds like more [expensive] trouble than it's worth. But thanks for the info!