[mythtv-users] LiveTV Pausing issue

Sun May 4 18:10:47 UTC 2014

Here are the mythtv versions.  The packages are updated regularly via
mythbuntu 12.04:

# mythbackend --version
MythTV Version : v0.27-214-g27668b7
MythTV Branch : fixes/0.27

# mythfrontend --version
MythTV Version : v0.27-214-g27668b7
MythTV Branch : fixes/0.27

The TV Guide is populated for the next 10 days.  I have 3 drives installed
on the system: SSD for OS, Disk1 and Disk2 for mythtv storage.  I use an
nvidia GPU, and have VDPAU enabled.  The backend and frontend run on the
same machine.

The stuttering does not occur when watching a show that continues past the
30/60min mark.  (ie: An hour show does not stutter at the 30min mark).
However, it does occur as one show ends, and a new show begins.  Here are
the logs from both programs when the stuttering occurred:

mythbackend:
May  4 14:00:00 ubermyth mythbackend: mythbackend[2167]: N CoreContext
autoexpire.cpp:264 (CalcParams) AutoExpire: CalcParams(): Max required Free
Space: 3.0 GB w/freq: 14 min
May  4 14:00:00 ubermyth mythbackend: mythbackend[2167]: I
HDHRStreamHandler tv_rec.cpp:3398 (RingBufferChanged) TVRec[3]:
RingBufferChanged()
May  4 14:00:00 ubermyth mythbackend: mythbackend[2167]: I
HDHRStreamHandler tv_rec.cpp:834 (FinishedRecording) TVRec[3]:
FinishedRecording(1681_2014-05-04T17:34:49Z) damaged recq:<RecordingQuality
overall_score="0" key="1681_2014-05-04T17:34:49Z"
countinuity_error_count="0" packet_count="16654579">#012    <Gap
start="2014-05-04T17:00:00Z" end="2014-05-04T17:34:48Z" duration="2088"
/>#012</RecordingQuality>

mythfrontend:
May  4 14:00:00 ubermyth mythfrontend.real: mythfrontend[2204]: I Decoder
ringbuffer.cpp:1122 (WaitForAvail)
RingBuf(/myth/shows1/livetv/1681_20140504180000.mpg): Checking to see if
there's a new livetv program to switch to..
May  4 14:00:01 ubermyth mythfrontend.real: mythfrontend[2204]: E Decoder
avformatdecoder.cpp:4676 (GetFrame) decoding error#012#011#011#011eno:
Unknown error 541478725 (541478725)
May  4 14:00:01 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2989 (EventLoop) Player(4): LiveTV forcing
JumpTo 1
May  4 14:00:01 ubermyth mythfrontend.real: mythfrontend[2204]: E Decoder
avformatdecoder.cpp:4676 (GetFrame) decoding error#012#011#011#011eno:
Unknown error 541478725 (541478725)
May  4 14:00:01 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
102ms for video buffers AAAdALAAAAAAAA
May  4 14:00:01 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
205ms for video buffers AAAdALAAAAAAAA
May  4 14:00:01 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
307ms for video buffers AAAdALAAAAAAAA
May  4 14:00:01 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
410ms for video buffers AAAdALAAAAAAAA
May  4 14:00:06 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
103ms for video buffers dAADAAAAAAAADL
May  4 14:00:06 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
103ms for video buffers AAdAAADALAAAAd
May  4 14:00:06 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
102ms for video buffers AAAAdAAAdDLAAA
May  4 14:00:07 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
205ms for video buffers AAAAdAAAdDLAAA
May  4 14:00:07 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
308ms for video buffers AAAAdAAAdDLAAA
May  4 14:00:07 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(4): Waited
103ms for video buffers AdADAAADAAAALA

@Stephen: I believe the problem affects the recording.  After the
stuttering occurred, I skipped back, and replayed the segment again.  Now,
the video skips over the affected area (1-2 sec skip).  This is also output
by the mythfrontend:

May  4 14:08:24 ubermyth mythfrontend.real: mythfrontend[2204]: I Decoder
ringbuffer.cpp:1122 (WaitForAvail)
RingBuf(/myth/shows1/livetv/1681_20140504180000.mpg): Checking to see if
there's a new livetv program to switch to..
May  4 14:08:24 ubermyth mythfrontend.real: mythfrontend[2204]: E Decoder
avformatdecoder.cpp:4676 (GetFrame) decoding error#012#011#011#011eno:
Unknown error 541478725 (541478725)
May  4 14:08:24 ubermyth mythfrontend.real: mythfrontend[2204]: N
CoreContext mythplayer.cpp:2989 (EventLoop) Player(4): LiveTV forcing
JumpTo 1
May  4 14:08:24 ubermyth mythfrontend.real: mythfrontend[2204]: E Decoder
avformatdecoder.cpp:4676 (GetFrame) decoding error#012#011#011#011eno:
Unknown error 541478725 (541478725)

Let me know if any additional information is needed.

-Robert

On Sun, May 4, 2014 at 1:38 AM, Stephen Worthington <
stephen_agent at jsw.gen.nz> wrote:

> On Sat, 3 May 2014 23:58:26 -0400, you wrote:
>
> >I'm experiencing an issue where LiveTV stutters / pauses for about 3-5
> >seconds around the top of the hour, and the 30 minute mark (ie: 4:29pm,
> >4:59pm).
> >
> >This occurs if LiveTV is using the only active tuner, or if other tuners
> >are being activated / deactivated.  So far, I only noticed this behavior
> >when there's no buffer.  I haven't tested if it occurs when LiveTV is
> >buffered.
> >
> >I'm running mythtv 0.27, with HD HomeRun Prime.
> >
> >-Robert
>
> Is the problem with the recording, or the playback?  Try moving
> backwards in the LiveTV recording past the point where the problem
> happened, then let it play the affected bit again and see if the
> problem is still there.
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