[mythtv] Some ATSC channels displayed "choppy", but only on LiveTV

Daniel Kristjansson danielk at cuymedia.net
Sun Oct 16 15:52:38 UTC 2005


On Sat, 2005-10-15 at 19:42 -0700, Jack Perveiler wrote:
> I have a few ATSC channels (on my PCHDTV-3000) that act erratically when I
> change to them in LiveTV in r7413.  Various frames from the feed look just fine

> When then backend changes to these channels on its own for scheduled recordings
> it does just fine (that is, the recordings it makes play back fine). 
> Additionally, if I change to the funky channel (which causes it to do the
> choppiness), then exit LiveTV and return (it starts up at the last channel I
> was tuned to, the choppy one) it also plays back fine.

> Any ideas/suggestions?  Is this ticket-worthy, or am I just doing something
> wrong?

I think this is because RingBuffer::CalcReadAheadThresh(int) is only
called when you start playing a stream, not when the stream changes.

Try the attached patch...
It may fix this problem for you...

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