[mythtv-users] Stuttering Video in some Live TV

Mon Jul 13 18:08:47 UTC 2009

For that very reason I have a 40GB drive as the MythTV system drive and a
1.5tb drive for storage of videos; music etc. backing up to 1TB of storage
in a remote frontend which is otherwise silent and backs-up during the day
when we're not otherwise using the system.

dont forget your backups or crtical data - I dont backup mythdatabase or
recordings; only music and other files.!

Thanks And Regards,

Richard Morton
07899 750400
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2009/7/13 <mythtv at derdev.com>

> Please note my point was a separate DRIVE not partition, hope you meant
> that.   The point is to get off of the same physical spindle.
>
> All you need to do is add another drive, format/mount, and modify the
> backend for "LiveTV" storage to use that new drive.
>
> > Thanks for your advice. With your first point, I still don't see why I
> > should have problems with even a very 'demanding' playback. I have a
> > dual-core 6000+ processor (with 64-bit Ubuntu) and I also have 6 GB of
> RAM
> > installed besides running 2 8600GT graphic cards in SLI. My system is I
> > believe quite powerful enough. I must say though that I only have a
> > 19-inch
> > monitor. Would that make a difference? Like I said, with Windows the
> > hardware works without problems.
> > With your second point, I will look into this. I will build a partition
> > exclusively for MythTV live and recordings. I forgot to mention that
> > currently my Live TV is on an LVM volume. It is a separate LVM partition
> > but
> > it is in the same physical volume group as my OS/MySQL. That could affect
> > playback. Could you give me advice on how to copy this partition to a
> > separate partition? I have already recorded stuff I don't want to lose.
> >
> > Thanks
> >
> > Danny
> >
> > On Mon, Jul 13, 2009 at 2:47 PM, <mythtv at derdev.com> wrote:
> >
> >> Simplest observations a Myth noob can offer:
> >>
> >> 1) There are various resolutions of HD broadcast output quality, so some
> >> stations are simply more "demanding" for playback than others...
> >> Shouldn't make a difference in general, but if you're on the margin,
> >> then
> >> my (limited) experience is that the most intense HD programming will tip
> >> the balance.
> >>
> >> 2) I also took to heart the forum advice that you should use a separate
> >> disk for "watch live TV" storage from your OS/MySQL db.  I found that
> >> once
> >> I moved my live tv storage volume to another disk, that greatly improved
> >> stutter and other artifacts in playback.  This is a mythbackend setting.
> >>
> >>
> >>
> >>
> >> > I've been trying to find a solution to my MythTV problem. I have
> >> combed
> >> > the forums and although I found that some users have a similar
> >> problem, I
> >> > haven't found a satisfactory solution. The problem is this: on some
> >> > channels
> >> > like Channels 3 and 4, I get terribly bad stuttering playback of Live
> >> TV.
> >> > However this doesn't happen with other channels like the BBC which
> >> play
> >> > fine, quite good actually. I don't understand while a few channels
> >> stutter
> >> > while most don't.
> >> >
> >> > I have an AMD64 Dual Core, with dual SLI 8600GT Nvidia cards and a
> >> > Hauppauge HVR 3000 TV Card. I use the Nvidia VDPAU encoder although
> >> I've
> >> > tried different settings to the encoder to find solution to my
> >> problem.
> >> > Using mythtv -v playback I get messages such as ac-tex being
> >> > damaged, MPEG motion out of boundary, and NVP: video frames behind
> >> audio.
> >> > I've also tried different settings in the frontend but problem
> >> persist.
> >> > I'm
> >> > sure the problem is not hardware because I dual-boot with Windows and
> >> > using
> >> > Hauppauge propriety package I can watch Live TV there without any
> >> problem.
> >> > From the forums my intuition tells me it might have something to do
> >> with
> >> > i2c. I don't know anything about i2c and I'm not sure how this relates
> >> to
> >> > MythTV or to Hauppauge driver modules. An explanation would be great.
> >> I
> >> > also
> >> > suspect that for the channels that don't work, they use the same
> >> > transcoder
> >> > and I might have a missing codec.
> >> >
> >> > I'd like to add that I'm very new with Linux and MythTV. I really like
> >> > using
> >> > them both so a much like for me would be highly appreciated.
> >> >
> >> > Danny
> >> > _______________________________________________
> >> > mythtv-users mailing list
> >> > mythtv-users at mythtv.org
> >> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >> >
> >>
> >>
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> >>
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>
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