[vdr] Re: VDR-1.3.19 : DD-Audio stuttering when switching between Pro7 and Sat1

["Dr. Werner Fink" <werner@suse.de>]

On Thu, Feb 10, 2005 at 11:05:13PM +0200, Mikko Salo wrote:
> On Thu, 2005-02-10 at 13:37 +0100, Dr. Werner Fink wrote:
> >> Hi Werner!
> >> 
> >> Yes 'No lights' means also no audio. This is odd because DD2.0 and DD5.1
> >> did work just fine when I was using vdr 1.3.18. Now with 1.3.20 I only
> >> get it work with DD5.1 after the vdr-1.3.20-ac3-transfer.diff patch.
> >
> >
> >Does this mean that with VDR-1.3.18 the firmware has played DD2.0 and
> >DD5.1?  If 1.3.19 and 1.3.20 can not do so I'd like to suppose that
> >the re-assembling code for the AC3 frames of the payload of the PS1
> >PES stream is broken ... at least for DD2.0.
> 
> Yes, vdr 1.3.18 played DD2.0 and DD5.1 in Live mode, 1.3.19 and 1.3.20
> not. I just confirmed this for switching back to 1.3.18 and it is still
> working at both DD2.0 and DD5.1. I have many patches applied to 1.3.18
> and that doesn't broke audio playback in any way, so I must say there's
> something broken in the AC3 re-assembling code in newer vdr versions.

Can you replay a recording done with VDR 1.3.18 with VDR 1.3.20?
Can you replay a recording done with VDR 1.3.18 with the test_av_play
binary (-> http://www.suse.de/~werner/test_av-1.0rc5.tar.bz2)?
Can you replay a recording done with VDR 1.3.20 with the test_av_play
binary?

> ...and I haven't find any fix :(
> AC3 playback is still working in DD5.1, DD2.0 doesn't. Now I noticed
> that even DD5.1 isn't rock solid every time, so I have to switch
> channels back and forth when receiver doesn't go to DD5.1 mode.
> My receiver is Pioneer VSX-C300 and that it is in AC3overDVB supported
> list. http://www.muempf.de/down/DD-receiver-status.txt

Hmmm ... the format of the PS1 PES headers and the order of
AC3 frames in the PES payload could be a problem for the 
cDolbyRepacker.  IMHO two samples, one wth DD5.1 and one with
DD2.0, done with VDR 1.3.18 are required to analyze the problem.

> >Maybe Reinhard knows more about.
> >Nevertheless, which channel has this problem for you?


        Werner

-- 
AC3 loop through sound card http://bitstreamout.sourceforge.net/
Howto http://www.vdr-portal.de/board/thread.php?threadid=1958
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