[mythtv] [mythtv-commits] Ticket #4606: Broken progress bar in DVB-Radio playback plus stuttering

[Mark Buechler]

Hi.

On Wed, Feb 20, 2008 at 10:08 PM, MythTV <mythtv at cvs.mythtv.org> wrote:

> #4606: Broken progress bar in DVB-Radio playback plus stuttering
>
> -------------------------------------------+--------------------------------
>  Reporter:  Robin Gilks <g8ecj at gilks.org>  |        Owner:  ijr
>     Type:  defect                         |       Status:  new
>  Priority:  blocker                        |    Milestone:  0.21
> Component:  mythtv                         |      Version:  head
>  Severity:  medium                         |   Resolution:
>  Mlocked:  0                              |
>
> -------------------------------------------+--------------------------------
>
> Comment(by latepaul at gmail.com):
>
>  I'm hitting this problem too. What I've noticed is that if you pause the
>  playback and then unpause it starts again and 'corrects' the stuttering.
>
>  Also when I first hit this problem I experienced it as the whole machine
>  hanging. I discovered that it wasn't actually hanging but that the
>  mythfrontend was taking all the CPU. It would eventually respond to e.g.
> a
>  keypress, but it was taking forever and practically speaking I had to
>  reboot.
>
>  I had real-time priority set up using /etc/security/limit.conf. When I
>  disabled this I got the problem as described here - stuttering. I also
> see
>  the progress bar as '01 of 01'
>
>  When listening to DVB Radio view LiveTV I don't get this problem. I can
>  play back the underlying recording file with mplayer without stuttering.
>
>  Let me know if you want me to upload any logs etc.


I believe the stuttering is from the stream size difference between
pre-multirec and trunk. The old way was to create dummy video and record it
along with the audio. Now the dummy video is being created on-demand by the
frontend - thus reducing the size of the stream. I believe the read size is
too large for such a small stream. However, adjusting it will affect video
streams. This may be where specialized storage groups comes in handy - one
for DVB audio only.


>
> --
> Ticket URL: <http://svn.mythtv.org/trac/ticket/4606#comment:3>
> MythTV <http://svn.mythtv.org/trac>
> MythTV
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- Mark.
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