[mythtv-users] Stuttering Video in some Live TV

[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
>> > _______________________________________________
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>> >
>>
>>
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