[vdr] Re: AC3 over DVBs / only DVD with sound

[<apieper@gmx.net>]

-------- Original Message --------
Subject: [vdr] Re: AC3 over DVBs / only DVD with sound (22-Feb-2002 13:52)
From:    werner@suse.de
To:      vdr@linuxtv.org

> On Fri, Feb 22, 2002 at 12:29:07PM +0000, apieper@gmx.net wrote:
> > -------- Original Message --------
> > > > 
> > > > The only different here is the total audio DD bitrate:
> > > > DVD: DD 384kbps
> > > > VDR: DD ~420kbps
> > > 
> > > Does ac3dec or ac3play work together with the A/V-receiver?
> > > OK this requires a soundcard with S/P-DIF supported by ALSA.
> > 
> > Never tried.
> > 
> > But another PC (running Win98) with a creative sb live
> > works good with my receiver when replaying dvd.
> > 
> > I forgot to mention that i am using a dvbs-card v1.3
> 
> Hmmm ... a test with ac3dec or ac3play would be nice, because
> both tools uses little endianes (e.g. convert ac3 to
> little endian) due most ALSA drivers are using little endian
> for input.  Nevertheless the output on the S/P-DIF has to
> be the natural bit oder aka big endian.

Ups, what's 'little endian'?
 
> AFAIS the ac3 patch from Wolfi uses big endian and I suppose
> that the S/P-DIF out from the DVB card is big endian because
> it is possible to connect e.g. a TOS Link or a
> professionel IEC 958 connector.
> 
> Now the question is : how do you have connected the S/P-DIF
> out of the DVB card to the A/V-receiver ... are you using
> a soundcard as loop through and if so I suppose you're using
> ALSA and alsamixer to control the soundcars I/O.  Maybe
> alsamixer helps you to hear something.

No soundcard loopthrough, there even is no soundcard in my vdr-box.
I am using a direct connection from J2 SPDIFF-out to my a/v receiver
(ok, in between there is a koax->opto converter, but for testing i
removed him - only dvd-ac3 either).

Maybe i should investigate if my receiver is capable of replaying the
higher bitrate of vdr-recordings altogether.

Is there anybody on this list who has a working playback of vdr-ac3-recordings
through a yamaha-receiver, especially a rx-v595?

...Andreas