[mythtv-users] Captions with HD-PVR help

[Mike Rice]

On Sun, Nov 9, 2014 at 8:06 PM, Bob <mythtv at cox.net> wrote:

> On 11/05/2014 07:49 PM, Mike Rice wrote:
>
>> I've pulled out my pvr-150s and pvr-350 and have been trying to use one
>> for closed captions for my HD-PVR recordings.
>>
>> http://www.mythtv.org/wiki/Captions_With_HD_PVR <
>> http://www.mythtv.org/wiki/Captions_With_HD_PVR>
>>
>> I verified that my TV shows captions on the composite input from my
>> Motorola DCH3200 cable box.  But for whatever reason I don't seem to be
>> recording any captions in the mpeg generated.  At least ccextractor doesn't
>> seem to produce any output and viewing the mpeg file in mythtv doesn't seem
>> to indicate there are captions.
>>
>> Here's what I've done.  See anything I am doing wrong?
>>
>>  Disclaimer: I did not read your entire post.
>
> However, one of my problems I faced was my capture could not *not* output
> captions unless the card was producing an MPEG stream. My understanding is
> this is an issue with the way the driver was written.  So, if you do:
>
> cat /dev/videoX > /dev/null &
> zvbi2raw -m -d /dev/vbiX > pass2.vbiraw
>
> This may get the captions for you.
>
> Reference: http://www.gossamer-threads.com/lists/mythtv/users/559759


Thanks, Bob.  Using zvbi2raw is the key for my situation.  I found some
channels that ccextractor works on but some it did not.  All the channels
work on my TV and I found they also work with zvbi-ntsc-cc.  I guess there
are two types of captions being produced by my cable box.  Fortunately
zvbi2raw works on both.

I still need to work on getting the timing right though.  There are several
things working against me.  First my channel change script sleeps for 4
seconds so right off I have at least 4 seconds of captions more that I
need.  And second ccextractor (at least the version I have) doesn't seem
happy with negative delays and comes up with some really strange times in
the .srt file.

I think I may try to start the vbi recording from a rec started writing
event instead of a rec started event.  That may get me closer to what I
need, and then ccextractor might add my delay better (or I'll use a perl
script).
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mythtv.org/pipermail/mythtv-users/attachments/20141111/14fe34e2/attachment.html>