[vdr] Re: A/V sync problems with new drivers

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Oliver Endriss wrote:
> 
> Juri Haberland wrote:
> > I know that this may be off-topic for this list, but as I posted this
> > a week ago on the linux-dvb list I didn't receive a single answer.
> >
> > Maybe one of you experienced the following behaviour also or has a
> > hint to why this is happening:
> >
> > With the new drivers 1.0.0-rc1 and -rc2 I experience desync of a/v in
> > VDR after viewing a recording. This does not happen with a driver
> > from CVS as of 13. January. This is very reproducable. It affects all
> > programs on the same frequency (I use DVB-T) but vanishes, if I
> > switch to a channel on another frequency.
> > This happens also, if I use the old firmware (from the 13-01 driver)
> > with the new driver, so it seems to be not a problem of the new
> > firmware.
> 
> @all who have A/V sync problems:
> Please try the following driver patch and report whether it solves the
> problem.
> 
> --- av7110.c.org        Tue Apr  1 15:01:30 2003
> +++ av7110.c    Wed Apr  2 20:39:37 2003
> @@ -2288,8 +2288,10 @@ ChangePIDs(av7110_t *av7110, u16 vpid, u
> 
>          av7110->pids[DMX_PES_SUBTITLE]=0;
> 
> -        if (av7110->fe_synced)
> +        if (av7110->fe_synced) {
> +                pcrpid = av7110->pids[DMX_PES_PCR];
>                  SetPIDs(av7110, vpid, apid, ttpid, subpid, pcrpid);
> +        }
> 
>          up(&av7110->pid_mutex);
>  }

I took today's CVS driver version, applied the above patch and tested with
Astra 19.2 channels "SR3" and "SWR BW" (apparently they broadcast the same
programme, so it was easy to compare lipsync). Without the patch I got A/V
desync after just a few times switching between these two channels. With the
patch the problem is gone.

Nice work, Oliver!

Klaus
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Klaus Schmidinger                       Phone: +49-8635-6989-10
CadSoft Computer GmbH                   Fax:   +49-8635-6989-40
Hofmark 2                               Email:   kls@cadsoft.de
D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de
_______________________________________________________________


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