[Ardour-Dev] 2.8.12 export problem

[Dominic Kaiser]

Hi John,

I had a similar issue in ardour3 during export.  It was on fedora 16
specifically.  I did not have that problem in ubuntu.
I will retest because as you know I have a problem with export of stems in
ardour3 and trying to figure out that also. I will try in mixbus also to
make sure it is not system wide or distro wide.  I am curious also.

Dominic

On Thu, Jun 14, 2012 at 12:11 PM, John Rigg <ardev2 at jrigg.co.uk> wrote:

> I've just tried exporting a stereo file from a 48kHz session in Ardour
> 2.8.12 to 44.1Hz 16-bit and encountered some very odd behaviour.
> In 2.8.11 this procedure used to produce a file without any audio in it
> for the first 3 or 4 attempts, but it would eventually export successfully.
>
> In 2.8.12 this has changed. The exported file contains audio but the
> file is truncated. Subsequent exports truncate the file to a different
> length, which appears to be random. Sometimes only a few MB are exported,
> other times 90% of what should be a 32MB file get exported. I gave up
> after 30 or so attempts failed to produce a full length file.
>
> Exporting to a 48kHz floating point file works fine.
> Exporting to 48kHz 16-bit with triangular dither also works.
> Add in sample rate conversion and the problem appears.
>
> System is Debian testing amd64 with jack-0.121.3 and 3.2.16 kernel with
> preempt but no rt-patch. Command line used to start jackd couldn't be
> simpler:
> jackd -d alsa
>
> For the time being I can work around it by exporting to 48kHz
> and then convert using sndfile-resample from the command line.
>
> Any ideas about what is causing this?
>
> John
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>
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