Mailing List Archive: MythTV: Dev

hd-pvr and playback

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steve at heistand

Jun 26, 2008, 7:43 PM

Post #1 of 5 (737 views)
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hd-pvr and playback

so I have the latest svn trunk build and the handy v4l libraries from jannau.
I can record from this beast just fine now. playback is my issue at the moment.
I can playback non-HD recordings just fine. however HD recordings start
giving my machine fits. mostly it seems in the audio department.
for a few seconds all is fine then mythtvfrontend starts taking up ~150% of a cpu.
(3.0ghz intel core 2 duo with 4G ram)
then things start stuttering. the audio is way behind the video and the video seems
to be slowing down to allow the audio to catch up.
This is with the internal myth player.
mplayer and vlc all choke on the files so at least mythtv is doing something
at least better.

any thoughts or suggestions?

thanks

s

"Why is it so hot inside this handbasket?"
--
Steve Heistand
steve[at]heistand.org

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mark.buechler at gmail

Jun 27, 2008, 3:53 AM

Post #2 of 5 (686 views)
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Re: hd-pvr and playback [In reply to]

Hi

On Thu, Jun 26, 2008 at 10:43 PM, Steve Heistand <steve[at]heistand.org> wrote:

> so I have the latest svn trunk build and the handy v4l libraries from
> jannau.
> I can record from this beast just fine now. playback is my issue at the
> moment.
> I can playback non-HD recordings just fine. however HD recordings start
> giving my machine fits. mostly it seems in the audio department.
> for a few seconds all is fine then mythtvfrontend starts taking up ~150% of
> a cpu.
> (3.0ghz intel core 2 duo with 4G ram)
> then things start stuttering. the audio is way behind the video and the
> video seems
> to be slowing down to allow the audio to catch up.
> This is with the internal myth player.
> mplayer and vlc all choke on the files so at least mythtv is doing
> something
> at least better.
>
> any thoughts or suggestions?
>

Try CoreAVC.

- Mark.

>
> thanks
>
> s
>
>
> "Why is it so hot inside this handbasket?"
> --
> Steve Heistand
> steve[at]heistand.org
>
> _______________________________________________
> mythtv-dev mailing list
> mythtv-dev[at]mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
>

jppoet at gmail

Jun 27, 2008, 10:28 AM

Post #3 of 5 (668 views)
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Re: hd-pvr and playback [In reply to]

On Thu, Jun 26, 2008 at 8:43 PM, Steve Heistand <steve[at]heistand.org> wrote:
> so I have the latest svn trunk build and the handy v4l libraries from jannau.
> I can record from this beast just fine now. playback is my issue at the moment.
> I can playback non-HD recordings just fine. however HD recordings start
> giving my machine fits. mostly it seems in the audio department.
> for a few seconds all is fine then mythtvfrontend starts taking up ~150% of a cpu.
> (3.0ghz intel core 2 duo with 4G ram)
> then things start stuttering. the audio is way behind the video and the video seems
> to be slowing down to allow the audio to catch up.
> This is with the internal myth player.
> mplayer and vlc all choke on the files so at least mythtv is doing something
> at least better.
>
> any thoughts or suggestions?

nVidia binary driver, right?

If this is a seperate backend and frontend, make sure you are using
"streaming" instead of an nfs mount to get the data to the frontend.

You have "use audio as timebase" selected, right?

My 3.0 GHz core 2 is able to handle these streams fine (at 1.0x
playback speed), so there must be some configuration problem.

John
--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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steve at heistand

Jun 27, 2008, 10:35 AM

Post #4 of 5 (670 views)
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Re: hd-pvr and playback [In reply to]

The latest nvidia drivers (173.14.05) yes.

Its a combined FE/BE, but I have on occasion
tried to play files that were on an NFS mounted
filesystem. didnt seem to make a difference but will
make sure the HDPVR files are local.

Ive been playing around with some of the options
on the "use audio as timebase" page but I dont
remember if that is checked or not. will make sure
it is.

are you using the coreAVC codecs as was mentioned
earlier?

thanks

s

"Why is it so hot inside this handbasket?"
--
Steve Heistand
steve[at]heistand.org

---------- Original Message -----------
From: "John P Poet" <jppoet[at]gmail.com>
To: "Development of mythtv" <mythtv-dev[at]mythtv.org>
Sent: Fri, 27 Jun 2008 11:28:22 -0600
Subject: Re: [mythtv] hd-pvr and playback

> On Thu, Jun 26, 2008 at 8:43 PM, Steve Heistand <steve[at]heistand.org> wrote:
> > so I have the latest svn trunk build and the handy v4l libraries from jannau.
> > I can record from this beast just fine now. playback is my issue at the moment.
> > I can playback non-HD recordings just fine. however HD recordings start
> > giving my machine fits. mostly it seems in the audio department.
> > for a few seconds all is fine then mythtvfrontend starts taking up ~150% of a cpu.
> > (3.0ghz intel core 2 duo with 4G ram)
> > then things start stuttering. the audio is way behind the video and the video seems
> > to be slowing down to allow the audio to catch up.
> > This is with the internal myth player.
> > mplayer and vlc all choke on the files so at least mythtv is doing something
> > at least better.
> >
> > any thoughts or suggestions?
>
> nVidia binary driver, right?
>
> If this is a seperate backend and frontend, make sure you are using
> "streaming" instead of an nfs mount to get the data to the frontend.
>
> You have "use audio as timebase" selected, right?
>
> My 3.0 GHz core 2 is able to handle these streams fine (at 1.0x
> playback speed), so there must be some configuration problem.
>
> John
> --
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> _______________________________________________
> mythtv-dev mailing list
> mythtv-dev[at]mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
------- End of Original Message -------

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jppoet at gmail

Jun 27, 2008, 11:43 AM

Post #5 of 5 (667 views)
Permalink

Re: hd-pvr and playback [In reply to]

On Fri, Jun 27, 2008 at 11:35 AM, Steve Heistand <steve[at]heistand.org> wrote:
> The latest nvidia drivers (173.14.05) yes.
>
> Its a combined FE/BE, but I have on occasion
> tried to play files that were on an NFS mounted
> filesystem. didnt seem to make a difference but will
> make sure the HDPVR files are local.
>
> Ive been playing around with some of the options
> on the "use audio as timebase" page but I dont
> remember if that is checked or not. will make sure
> it is.
>
> are you using the coreAVC codecs as was mentioned
> earlier?

I am not using coreavc. I have limited my STB to only output 720p, so
coreavc is not necessary.

John
--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
_______________________________________________
mythtv-dev mailing list
mythtv-dev[at]mythtv.org
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev

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