[mythtv-users] does closed captioning work?

Joseph A. Caputo jcaputo1 at comcast.net
Fri Jan 16 13:08:22 EST 2004


On Friday 16 January 2004 12:05, David jeske wrote:
> Alright, I have my hauppauge IR remote working now. I'm knocking off
> the remaining stuff one by one. My next challenge is getting closed
> captioning working.
>
> I've found various indications that closed captioning worked as early
> as version 0.9. I see the key to turn it on in keys.txt. However,
> when I press "T" nothing happens. I would expect to get a "captioning
> on" message, even if the program has no caption support. I'm using
> the apt-get 0.13 version per the Redhat 9 instructions.
>
> I didn't see anything in the faq. Searches turned up just a few
> really old messages talking about ivtv adding capture support, and
> someone "busy adding capture support" to myth one year ago yesterday.
>
> Do I need to do something special? I think all my data is still
> rtjpeg, but does the closed caption data get preserved when
> mythtranscoding to mpeg4?
>
> - David

AFAIK, Myth doesn't support getting Teletext/Closed Captions from cards 
using the ivtv driver (i.e., hardware MPEG encoder-based).  I believe 
the ivtv driver *may* be able to support it in the future, but I also 
believe Myth might need its VBI code reworked to support it if it does.

If you have a V4L (analog) card, in order to enable the capturing of 
captions, you need to set up some things in the backend setup 
(specifically, VBI device (i.e., /dev/vbi0) and format (i.e., Teletext 
or NTSC Closed Captions).

-JAC



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