[linux-dvb] Re: Antwort: VDR and AC3 out via SB live

[Martin Hoffmann <ma.hoff@t-online.de>]

So, with a DD broadcast still the same :-(

But taking into consideration that a recorded movie from pro7 is some
megabyte larger than it's demuxed and muxed video and mpeg1-layer2 makes me
think that vdr did record more than just the video and the layer2 stereo
audio !
However, i'm unable to get the "ac3" sound out of vdr via the -a option =>
just 0 bytes output file if using cat > file

Is there a way to check what stream types a recorded file contains ?
What am i doing wrong ?

Could anyone comment on this, please ?

Martin.

> Mh...
> Now i tried to cat the ac3 sound out of vdr into a file - but the file
> remains empty :-(
>
> Any idea what i could have done wrong ?
>
> I took the following entry in channels.conf for pro7:
> "Pro-7:12480:v:0:27500:255:256;257:32:0:898"
>
> Then i changed the call of vdr in the runvdr script to "-a catac3"
> And i created a script called "catac3" which i put in the /usr/bin dir
with
> the following content:
>
> #!/bin/sh
> cat > /video0/test.ac3
>
> Whats wrong with this ? the File /video0/test.ac3 is created when
switching
> to pro7 - but alway remains 0 byte :-(
> Do i have to turn anything else ON ?
>
> But anyway in 2 hours pro7 is going to cast a movie in DD - then i'll see
if
> the beavior differs...
>
> Martin.
>
> > I use a cmipci card ... anyway afaik Pro7 sends the digital-audio stream
> in
> > every broadcast EXCEPT commercials ... I tested several times with Pro7
> and
> > it works. Did you test to pipe the data into a file and play it with
> > play-ac3 ??? (first "-a cat > ac3data" and to see if it works play-ac3
> > ac3data) If this works the realtime should work too ..
> >
> > Anyway as another way try the alsa drivers .... they support ac3 over
> > digital output afaik.
> >
> > Stefan
> >
> >
> >
> >                     ma.hoff@t-online.d
> >                     e (Martin                 An:     "linux-dvb"
> <linux-dvb@linuxtv.org>
> >                     Hoffmann)                 Kopie:
> >                     Gesendet von:             Thema:  [linux-dvb] VDR
and
> AC3 out via SB live
> >                     linux-dvb-bounce@l
> >                     inuxtv.org
>
> >
> >
> >                     13.07.2001 22:32
> >
> >
> >
> >
> >
> >
> >
> > Hi,
> >
> > i'm trying to get the ac3 output via Soundblaster Live digital output to
> > work.
> >
> > Has anyone succesfully done this yet ?
> > If so, would you please tell me how to do that ?
> >
> > Here is what i have done so far:
> >
> > I took the latest cvs drivers for the SB Live (emu10k1) compiled them
and
> > compiled the tool play-ac3.
> > Okay, after loading those "filters" to enable ac3 output, the play-ac3
> with
> > a filename just works fine!
> > As far as i understand i have to add a "-a play-ac3 -" to the paramters
of
> > the vdr call. Or to be precise a script which is called by -a and
contains
> > the "play-ac3 -" command, because otherwise the "-" isn't passed
through.
> > So i thought this should work. But when switching to Pro7 there is only
> > silence (someone told me there would alway be ac3 2.0 ?) - and switching
> > back to any other channel (pro7 is the only one, i can receive, which
> > contains a Dolby pid) gives an error message from play-ac3 about a
broken
> > ac3 stream.
> > Is this behavior correct ? And will it work, if pro7 casts a movie
> > containing 5.1 DD ?
> >
> > Or is this the wrong way ?
> >
> > Any help would be nice...
> >
> >  Martin.
> >
> >
> >
> > --
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> > linux-dvb" as subject.
> >
> >
> >
> >
> >
> >
> >
> > --
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> >
>
>
>
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