[LAU] jack weirdness, and -verbose doesn't help

Eric Steinberg eric.steinberg at gmail.com
Mon Jul 18 23:43:58 UTC 2011


No, Rotter splits the files at one hour.  Average file size is about 52
megabytes.  This is, incidentally, the only way I can tell that the signal
chain is hosed/fubar- it starts writing files of 800k or so.

On Mon, Jul 18, 2011 at 4:27 PM, Bob van der Poel <bob at mellowood.ca> wrote:

> There is a limit to the size of a wav file. Are you writing a file too
> large after the time period?
>
> On Mon, Jul 18, 2011 at 4:02 PM, Eric Steinberg
> <eric.steinberg at gmail.com> wrote:
> > Hi all,
> > I'm trying to build an audio logger- a machine to record audio that can
> stay
> > running all the time.  I've been attempting to use Rotter and Jack for
> this,
> > but I'm getting the same problems across a variety of distros (Arch,
> Ubuntu,
> > Ubuntu Studio, CentOs &c.).  I'm using an Edirol FA-101, attached to a P4
> > 3ghz machine with a second SATA drive as an audio recording volume.  I
> > launch jack, with a big period so as to avoid xruns:
> > jackd -v -d firewire -r 44100 -n 3 -p 4096 2> jack_stderr.log >
> > jack_stdout.log &
> > Then I launch multiple instances of Rotter, one per channel, six total:
> > rotter -f flac -c 1 -n channelone -d 500 -L flat -v
> > /secondsatadrive/channelone
> > .
> > .
> > .
> > rotter -f flac -c 1 -n channelsix -d 500 -L flat -v
> > /secondsatadrive/channelsix
> > Then I launch esjit and patch physical input one to rotter instance
> > channelone, etc.
> > This works, for a while.  Jackd still gets xruns, but the recording
> happens
> > and files are written properly.  However, after several hours and a whole
> > lot of xruns, it stops working.  Files are still written and named
> properly,
> > but they are only a few hundred k in size and contain no audio.  The
> error
> > logs show the xruns, but nothing else (no error messages, except for
> xruns).
> >  The output of Rotter also does not show anything wrong.  Clearly, jackd
> is
> > breaking somehow; anyone have clues?  Any way to get more info from
> jackd?
> >  What am I doing wrong?  This problem is the same across several distros
> > (see above), and occurs whether or not I use the -R realtime flag.
> > _______________________________________________
> > Linux-audio-user mailing list
> > Linux-audio-user at lists.linuxaudio.org
> > http://lists.linuxaudio.org/listinfo/linux-audio-user
> >
> >
>
>
>
> --
> **** Listen to my CD at http://www.mellowood.ca/music/cedars ****
> Bob van der Poel ** Wynndel, British Columbia, CANADA **
> EMAIL: bob at mellowood.ca
> WWW:   http://www.mellowood.ca
>
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