Interesting, but it's more like 48-72 hours, and sometimes as much as 100 hours before recordings start to break. Others (Roberto, Lieven) on this list have mentioned integer overflow as a possible culprit, but I've been pretty consistent in the way I've set up recording, and the time-to-break is not consistent, i.e. it will sometimes go 4 or 5 days before breaking. What is consistent is that there will be many xruns and then things will break. I have not done hdparm on the disk used for recording, and I am not currently using an RT kernel (although I have used the Ubuntu Studio distro, with the same results as above). <br>
<br><div class="gmail_quote">On Mon, Jul 18, 2011 at 5:49 PM, Gabriel Beddingfield <span dir="ltr"><<a href="mailto:gabrbedd@gmail.com" target="_blank">gabrbedd@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>On 07/18/2011 06:02 PM, Eric Steinberg wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
jackd -v -d firewire -r 44100 -n 3 -p 4096 2> jack_stderr.log ><br>
jack_stdout.log &<br>
</blockquote>
<br></div>
Snip...<div><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
This works, for a while. Jackd still gets xruns, but the recording<br>
happens and files are written properly. However, after several hours<br>
and a whole lot of xruns, it stops working. Files are still written and<br>
named properly, but they are only a few hundred k in size and contain no<br>
audio. The error logs show the xruns, but nothing else (no error<br>
</blockquote>
<br></div>
How many hours? Is it a regular number?<br>
<br>
What happens when jack_frame_time() overflows? (jack_nframes_t, 32-bit unsigned) At 44.1k this would be about 27 hours.<br><font color="#888888">
<br>
-gabriel</font><div><div></div><div><br>
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