[mythtv] [mythtv-commits] Ticket #2688: Fix for ac3 passthrough glitch with timestretch

John P Poet jppoet at gmail.com
Wed Feb 6 05:28:19 UTC 2008


On Feb 5, 2008 8:31 PM, Daniel Kristjansson <danielk at cuymedia.net> wrote:
> On Tue, 2008-02-05 at 20:16 -0700, John P Poet wrote:
> > On Feb 5, 2008 12:04 PM, MythTV <mythtv at cvs.mythtv.org> wrote:
> > > #2688: Fix for ac3 passthrough glitch with timestretch
> > > ---------------------------+------------------------------------------------
> > >  Reporter:  cizek at rcn.com  |        Owner:  danielk
> > >      Type:  patch          |       Status:  closed
> > >  Priority:  minor          |    Milestone:  0.21
> > > Component:  mythtv         |      Version:  head
> > >  Severity:  medium         |   Resolution:  wontfix
> > >   Mlocked:  0              |
> > > ---------------------------+------------------------------------------------
> > > Changes (by danielk):
> > >
> > >   * status:  assigned => closed
> > >   * resolution:  => wontfix
> > >
> > >
> > > Comment:
> > >
> > >  This patch breaks ALSA audio here
> >
> > Interesting.  I use this patch with ALSA and it works fine for me.
> >
> > Without this patch, toggling from time-stretch back to 1.0x playback
> > causes a very quick audio drop-out every second or two.  This is with
> > S/PDIF to my pre-amp.
>
> Have you tried the latest patch on #1104? I'm currently getting the
> same type of noise + bursts of sped up sound with it after changing
> the time stretch with it as I was getting with this patch applied.
> (passthru work ok with the latest #1104 patch).
>
> -- Daniel

Sorry, I had not.  I just did with svn rev 15806.

With the mythtv_ac3.48.patch timestretch is complete unusable.  As
soon as I hit the "TOGGLESTRETCH" key (ctrl-s on my system), all I get
are clicks and pops -- the audio completely goes away.  Toggling the
timestretch to go back to 1.0x speed does not fix the problem -- The
only way to get the audio back is to stop the show and start playing
it again.

John
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