[mythtv-users] Live Playback of HDTV isn't smooth
wpoland at gmail.com
Mon Jan 2 15:38:02 UTC 2006
On 1/2/06, Kichigai Mentat <kichigai at comcast.net> wrote:
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> On Jan 1, 2006, at 17.22, Byron Poland wrote:
> > I've got a backend with 3 hd tuners in it, and a frontend with an
> > Athlon 2500+ (overclocked to 2700+) I'm using an nvidia 6200 to drive
> > a westinghouse lvm-37w1 at 1920x1080, with sound going out via ac3
> > passthrough. Recorded programs play back great. However when I try
> > watching live tv, (usually sports) things just aren't right. Audio is
> > fine, but video is somewhere between smooth and jerky. Its tough to
> > describe, but the more you watch it, the more it starts to hurt your
> > eyes..... Sometimes it looks like things are going in slowmotion, and
> > then it speeds up then back down. Anyone have any suggestions?
> Well, it sounds to me like your computer can't handle the playback.
> Something tells me an Athlon 2500+ (That's not the clock speed,
> actually) would offer up enough power to handle this, and I think the
> nVidia 6200 does hardware MPEG-2 decoding, but I don't know if it's
> capable of doing HD. But, since apparently recordings play fine, this
> can't be the problem. So, what does this leave us? The only
> specification you haven't mentioned: RAM.
> How much RAM do you have? Is it good (IE have you run a RAM test on
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Its got 1 gig of ram, and is okay, I've had bad ram before, so know
what to look for. I've even went so far as to put a gigabit nic card
in the frontend and the backend, plus a gigabit switch between them,
but it makes no difference.
It has something to do with the ringbuffer, as if I tell Myth to
record the program, and watch it from the recording folder as it
grows, it plays back fine.
I just realized my cache and recordings reside on different disks. I
might investigate that to see if it is something. But it also sounds
that .19 may fix this problem as it is going to treat livetv in a
completely different way, at least thats what I gather.
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