sox won't write output file when run in spawned shell

sox won't write output file when run in spawned shell

[Rob Robinett]

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Hi,

I am trying to us sox as part of an RF signal processing daemon on a
Raspberry Pi 3B Stretch.  When I execute sox from a terminal command line
the output file is created, but when I spawn the command it runs but
doesn't create the output file:

runs and creates '0.wav':              sox -r 32k -t raw -e s -b 16 -c 1
0.raw -r 12k 0.wav
runs but doesn't create '0.wav':    sox -r 32k -t raw -e s -b 16 -c 1 0.raw
-r 12k 0.wav
redirecting stdin/out/err and it still doesn't create '0.wav':      sox -r
32k -t raw -e s -b 16 -c 1 0.raw -r 12k 0.wav &> out.log < /dev/null &

the sox output seems the same in all cases and echo $? print 0 == success.
What am I missing?

thanks

Rob

-- 
Rob Robinett
AI6VN
rob@robinett.us
mobile: +1 650 218 8896

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Re: sox won't write output file when run in spawned shell

[Måns Rullgård]

Rob Robinett <rob@robinett.us> writes:

> Hi,
>
> I am trying to us sox as part of an RF signal processing daemon on a
> Raspberry Pi 3B Stretch.  When I execute sox from a terminal command line
> the output file is created, but when I spawn the command it runs but
> doesn't create the output file:
>
> runs and creates '0.wav':              sox -r 32k -t raw -e s -b 16 -c 1
> 0.raw -r 12k 0.wav
> runs but doesn't create '0.wav':    sox -r 32k -t raw -e s -b 16 -c 1 0.raw
> -r 12k 0.wav
> redirecting stdin/out/err and it still doesn't create '0.wav':      sox -r
> 32k -t raw -e s -b 16 -c 1 0.raw -r 12k 0.wav &> out.log < /dev/null &
>
> the sox output seems the same in all cases and echo $? print 0 == success.
> What am I missing?

The daemon is probably running in a different directory than you're
expecting.  Use full path names in the sox command and see if that
helps.

-- 
Måns Rullgård


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Re: sox won't write output file when run in spawned shell

[Rob Robinett]

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You were correct,  There was no problem with sox, it was with my daemon.

thanks,



On Mon, Nov 5, 2018 at 7:54 AM, Måns Rullgård <mans@mansr.com> wrote:

> Rob Robinett <rob@robinett.us> writes:
>
> > Hi,
> >
> > I am trying to us sox as part of an RF signal processing daemon on a
> > Raspberry Pi 3B Stretch.  When I execute sox from a terminal command line
> > the output file is created, but when I spawn the command it runs but
> > doesn't create the output file:
> >
> > runs and creates '0.wav':              sox -r 32k -t raw -e s -b 16 -c 1
> > 0.raw -r 12k 0.wav
> > runs but doesn't create '0.wav':    sox -r 32k -t raw -e s -b 16 -c 1
> 0.raw
> > -r 12k 0.wav
> > redirecting stdin/out/err and it still doesn't create '0.wav':      sox
> -r
> > 32k -t raw -e s -b 16 -c 1 0.raw -r 12k 0.wav &> out.log < /dev/null &
> >
> > the sox output seems the same in all cases and echo $? print 0 ==
> success.
> > What am I missing?
>
> The daemon is probably running in a different directory than you're
> expecting.  Use full path names in the sox command and see if that
> helps.
>
> --
> Måns Rullgård
>



-- 
Rob Robinett
AI6VN
rob@robinett.us
mobile: +1 650 218 8896

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