[mythtv-users] Stuttering Video in some Live TV

Tue Jul 14 12:40:44 UTC 2009

Thanks again for replying. I'll try and place my LiveTV to another drive. If
that does work very well, then I'll get an extra drive solely for MythTV
recordings and TV. I'll let you know how I got on once I've finished the
trial.

Thanks again

Danny

On Mon, Jul 13, 2009 at 7:08 PM, Richard Morton
<richard.e.morton at gmail.com>wrote:

> 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
>> >> > _______________________________________________
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>> >> > mythtv-users at mythtv.org
>> >> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>> >> >
>> >>
>> >>
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