[mythtv-users] Playback Stutters

[Christian Hack]

I would be looking at maybe a failing disk taking a while to respond. Get
Playback Data up when it's stuttering and I think it will hit 0% in the
buffer.

I presume it happens randomly. Can you test playback from another disk.
On 28/12/2014 11:23 AM, "Andy" <mizeraka at yahoo.com> wrote:

> Hi.
> I just upgraded my backend.  It is a headless backed running Ubuntu server
> edition.  I have mythtv installed (0.27).  I have 2- 2TB WD green drives in
> a RAID 0 setup with LVM (ext4) on top.  They are connected via SATA III.
> During video playback I am getting skipping of the video.  In the log I
> see:
>
> mythfrontend[20625]: N CoreContext mythplayer.cpp:2130
> (PrebufferEnoughFrames) Player(6): Waited 312ms for video buffers
> AAAAAAAAAAAAAA
> mythfrontend[20625]: I Decoder avformatdecoder.cpp:663 (DoFastForward)
> AFD: No DTS Seeking Hack!
>
> In the Playback Data accessed from the menu, I see:
>  Available Buffer 99% of 8 Mb
>
> That occasionally drops down to ~35% but seems to quickly recover.  The
> CPU usage is between 1%-15% (there are 4 CPUs).  I haven't been monitoring
> the Playback data when I've noticed a skip.
>
> I don't seem to notice this with playback of recordings, only playback of
> videos (mp4 format).
>
> I have increased the audiobuffer in /proc/asound....
>
> I read all about prebuffering pauses on mythtv.org, but I'm not sure what
> applies to me and my system.  I thought a RAID 0 would make it faster, not
> slower, but I'm concerned my filesystem setup is my problem.   Are there
> other things I should look at before I back up all my recordings, and
> videos and redo my filesystem?
>
> Thanks,
> Andy M.
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