[mythtv-users] I'm in....

[J Donavan Stanley]

On Fri, 2003-11-14 at 11:03, Boyd II, Willy wrote:
> >-----Original Message-----
> >From: Chris Delis [mailto:chris at delis.net] 
> >Sent: Friday, November 14, 2003 9:34 AM
> >To: Discussion about mythtv
> >Subject: RE: [mythtv-users] I'm in....
> >
> >
> >
> >You can determine the size of the ringbuffer during setup.
> >
> 
> Nope, this has nothing to do with the live buffer we're talking about.  Yes,
> the size of the ringbuffer can be set, so you get to decide how long you can
> pause, basically.  (This buffer will hold up to 2GB, 3GB, etc etc)  But a
> mythtv "live" stream has to be at least 3-4 seconds (currently) behind real
> live tv.  This is because we're recording data then turning around and
> playing it at the same time.  What we're concerned about is finding a way to
> trim this 3-4 second delay.  (But once you pause, you're storing quite a lot
> of live data as it comes in, and there must be a limit to this size...
> again, that's what the Ringbuffer setting is for)
> 
> >Also, I _think_ part of the delay is caused by deleting the 
> >old ringbuffer and creating a new one. 
> 
> Nope, that possibility has already been taken care of by Isaac in CVS
> (discussed on the mythtv-devel list I think).  Even ignoring channel change:
> if I fast-forward as far as the player will let me, then compare real live
> tv on a tv, with the myth output, it's a full 4 seconds behind for me.
> Which suggests the delay has little to do with channel change actions, and
> more to do with how much the player process needs to output reliably (with
> no dropped frames or audio blips, etc.)


As an aside, having two TVs one with TiVO one without on the same
channel exhibits a 2-3 second delay.  It's just just enough to be
annoying.  If a person is speaking it's about 2 words behind.