Re: [patch] problem w/ arecord "split interleaved files" feature

[Dave Maley <dmaley@nc.rr.com>]

Thanks for the quick response ...

> > [dave@flanders ~]$ arecord -q -t wav -f dat -d 10800 | sox -t wav -r
> > 48000 -c 2 - -t wav -r 44100 -c 2 foo.wav resample
> > 
> > 
> > It seems this new split feature doesn't work properly when writing to a
> > pipe (or at least when piping to sox).  A quick look at an strace shows
> > constant write errors, and foo.wav grows in size until the disk is full.
> 
> I guess it's rather a bug of sox.  arecord quits when the data size
> reaches to max_filesize in the case of pipe output (since obviously
> you cannot split the output).  sox should quits, too, when receiving
> EPIPE error.

Hmm, this doesn't seem to match the behavior I'm seeing.  It's very
possible I'm misunderstanding something here, but this is what I see:

Using the above arecord | sox command when the foo.wav file reaches
2000000000 in size and the split occurs it'll actually be split into
foo-01.wav and foo-02.wav, and I believe that this rename of foo.wav to
foo-01.wav is where the problem may be occurring.  I can capture strace
output at the time of the split, if it's at all helpful.

> > A quick fix for this is to set max_filesize to 2147483648.  Not sure if
> > this is a "proper" fix however I have tested it and it seems to work
> > just fine for me.  Please consider the attached patch.
> 
> Well, I'm not sure whether exactly 2GB is allowed.

If not then I'd be happy with just increasing this max_filesize to
2073600044 as that's what my 180 minute 48KHz files end up being ... 8)

Thanks again for your feedback on this.

~Dave



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