[mythtv] Re: [mythtv-commits] Ticket #326: RingBuffer remains paused while dummyrec is filing it.

Stuart Auchterlonie stuarta at squashedfrog.net
Tue Sep 13 10:36:52 UTC 2005

On Mon, Sep 12, 2005 at 12:14:55AM -0400, Daniel Kristjansson wrote:
> On Mon, 2005-09-12 at 14:01 +1000, Mark Spieth wrote:
> > > #326: RingBuffer remains paused while dummyrec is filing it.
> > >  In some ways the RingBuffer continues to work, but this causes a number
> > of
> > >  subtle problems. But most important it appears to be the cause of the UI
> > >  unresponsiveness for John Pullan and Mark Spieth.
> > I may be wrong but I dont think this is my livetv problem. its more of a PMT
> > acquisition issue way before it gets to the ringbuffer. that what the logs
> > look like they are showing. but I defer to you greater knowledge.
> I believe you may have two problems:
>  1/ This problem, which prevents you from changing the channel when a
>     valid PMT can not be obtained.
>  2/ The problem of not having a valid PMT, which could be a number of
>     things, but is most likely a configuration problem.

Depends on the definition of valid PMT.

1. Purely data channels have a valid PMT, but no audio or video streams.
2. Radio channels (in UK) have audio + data streams.
3. Normal channels have audio + video.

For livetv currently only 3 is valid.

UK channels when they go "off air" they transition from type 3 to
type 1. When they go "on air" they transition back to type 3.
This allows the broadcasters to share frequencies between channels.


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