[nas] Re: help with using sox with nas

[sibusiso xolo]

Greetings,

Tobias Diedrich wrote:
> auplay does seem to have some problems with playing from stdin, but this
> should work:
>
> LD_PRELOAD= sox -w -s -c 2 -r 44100 -t ossdsp /dev/dsp -t raw - |
> LD_PRELOAD=libaudiooss.so sox -t raw -w -s -c 2 -r 44100 - -t ossdsp
> /dev/dsp

I now had a chance to try out the bt848 card in more than one motherbard.  I 
get the same results:  I do not seem to be able to to get sound  over a 
network  using  nas/audiooss:  I  tried the following:

1) I tried running xawtv  with the following command;

xawtv  LD_PRELOAD=libaudiooss.so AUDIOSERVER=remotenasserver:0 sox -t raw -r 
44100 -c 2 -w -s - -t ossdsp /dev/dsp

and I get the response  station "-" not found.  if  I start xawtv with  
-station=n  or started with  -C  -|  before LD_preload   the error disappears 
but I still  get no sound on the nas server. (Sound only on the  local 
machine)  (I also tried  changing to mono -r 8000  -c 1 with the same 
results.) 

2) I then tried  your suggested command  

LD_PRELOAD= sox -w -s -c 2 -r 44100 -t ossdsp /dev/dsp -t raw - |  
LD_PRELOAD=libaudiooss.so sox -t raw -w -s -c 2 -r 44100 - -t ossdsp
 /dev/dsp

I inserted AUDIOSERVER=remotenasserver:0.0 after libausiooss.so 
(a) the above command  with  xawtv -C  after the first instance of raw and    
the response was as in (1)  above.
(b) the above command started in one terminal and xawtv  started in other 
terminal; there was    no response on the nas server  but  as before sound on 
the machine where xawtv is started..

(I get the same response in every case whether I define  the sound card  with 
xawtv  -C /dev/dsp (or as  above with sox)  or  with  -C  /dev/video (i.e. 
sound card disconnected  from the line-out of  the bt848 card).

I have had quite an exhaustive go  The bad-luck so far be be  due to an 
artifact of xawtv, who knows (I have not looked at the sources).   I will be 
happy to give your other suggestions a whirl.

Thanks again and goodbye
Sibu Xolo



On Wednesday 02 October 2002 13:58, Tobias Diedrich wrote:
> sibusiso xolo wrote:
> > I am trying to route sound from a bt848 tv/radio card  (using v4l) to a
> > remote nas server:  I have done the  following:-
> > 1) I have libaudiooss installed
> > 3) the commands
> >  export AUDIOSERVER=remote:0.0  and
> >  export LD_PRELOAD=/usr/X11R6/lib/libaudiooss.so.1.0
> > are issued on  the local and remote hosts.
>
> You only need this on the client (local) host. For the server it is
> sufficient if it runs nasd.
>
> > 4) on the local host with the bt848 card  I use the sound
> > routing/conversion utility known as sox as follows:
> > sox -w -c 2 -r 44100 -t ossdsp /dev/dsp -t raw - | auplay -l
> >
> > but nothing happens.  I would be grateful for any help ffrom nas users
> > who
>
> In this case it is not good to globally export the LD_PRELOAD line
> because this means libaudiooss is linked agains every app you start
> after that and it always tries to redirect accesses to /dev/dsp to the
> server.
> auplay does seem to have some problems with playing from stdin, but this
> should work:
>
> LD_PRELOAD= sox -w -s -c 2 -r 44100 -t ossdsp /dev/dsp -t raw - |
> LD_PRELOAD=libaudiooss.so sox -t raw -w -s -c 2 -r 44100 - -t ossdsp
> /dev/dsp
>
> Here the first sox command is used without libaudiooss preloaded so that
> it will access your real soundcard and the second is used with
> libaudiooss preloaded so that the output will get redirected to the
> server.