[mythtv-users] PVR 350, closed captioning, commercial detection

Jesse Guardiani jesse at wingnet.net
Mon Aug 8 15:23:45 UTC 2005

Daniel Segel wrote:

> Jesse D. Guardiani wrote:
>> Hello,
>> It took me literally a week of my off time, but I've finally got
>> most of the components of mythtv running to my satisfaction:
>> Home made IR Blaster, PVR 350, 250G disk array over NFS, updated
>> knoppmyth ivtv drivers to 0.3.7b so I can watch DVDs on the 350's
>> TV out, etc...
>> LiveTV and playback are working great, but commercial detection
>> and closed captioning don't work at all.
>> Anyone encountered this before? Is it an ivtv driver issue, or
>> a mythtv issue?
>> Thanks!
> CC sort of works with the PVR-350, but you have to use the ivtv driver 
> form of it, not the CC functions within MythTV. This means you control 
> CC using your TV's CC decoder, just like if your were watching a 
> normal broadcast. You can enable it by setting the CC options for the 
> ivtv driver in your modules.conf (or wherever is appropriate for your 
> distro). I do it like this in /etc/modules.d/ivtv on my Gentoo system:
> post-install ivtv /usr/local/bin/ivtvctl -p 6 -l 2 -x 1 -w wss,cc -b 
> wss,cc
> I say "sort of works" because it has a bug that renders it nearly 
> unusable - it only works if you start playback from the very beginning 
> of the recording, and it stops if you skip either direction or FF or 
> REW. Basically any motion in the recording other than simply watching 
> it straight through will turn off the CC decoding. This includes 
> commercial skipping.
> It's being discussed off and on on the ivtv-dev list, and will 
> hopefully be fixed soon, but then again it may not be.

Ah. Great answer. Thanks.

Does anyone happen to know why can't mythtv tap into the CC stream?
What's the difference between this CC stream and some other CC stream
from a different tuner card?


Jesse Guardiani
Programmer/Sys Admin
jesse at wingnet.net

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