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[linux-dvb] Re: AW: Re: VDR and DVD with pause -> noise corrupt
Ralph Metzler wrote:
>
> Klaus Schmidinger writes:
> > Ralph Metzler wrote:
> > >
> > > Klaus Schmidinger writes:
> > > > If the audio frames don't contain a PTS, it's no wonder they get out of sync
> > > > (even in normal replay video and audio gets out of sync after some time).
> > >
> > > They should not any longer after my last firmware syncing patch
> > > about 10 days ago. This patch no longer was a workaround for the
> > > "jerking picture bug", which would just sync audio/video at the start
> > > of playback, but a complete fix. Syncing is always on now.
> >
> > I just replayed a DVD with the latest versions of both driver and VDR,
> > but after a while video and audio ran out of sync (audio was about half
> > a second early). I'm not talking about external AC3 replay, but "internal"
> > replay of both audio and video via the DVB card (converted by the 'ac3dec'
> > that comes with VDR).
> >
> > Do others also experience this, or is it just me?
> >
> > > > Is there a way to have ac3dec generate the necessary PTS for the audio frames?
> > > > The original Dolby Digital frames that ac3dec uses to generate the "normal"
> > > > audio frames must, I believe, contain a PTS, don't they?
> > >
> > > Of course they contain the correct PTS but reinserting it would not
> > > help because the decoder hardware does not support syncing for PCM sound.
>
> But you were talking about "normal replay" which I understood to mean
> normal MPEG2 video and MPEG audio.
> As I already wrote above, there is no syncing if using PCM. So, I am not
> surprised that sync is lost.
> Or does your ac3dec convert to MPEG audio? If it does, does it insert
> the proper PTSs?
>
> Ralph
Maybe Andreas (Schultz) or Matjaz (Thaler) can comment on this.
I haven't looked into the ac3dec version that was provided by
Andreas and Matjaz yet.
Klaus
--
_______________________________________________________________
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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