Sound using QTKit "cracks up" randomly
Sound using QTKit "cracks up" randomly
- Subject: Sound using QTKit "cracks up" randomly
- From: Ron Fleckner <email@hidden>
- Date: Tue, 27 Nov 2007 17:17:07 +1100
Hi,
I have a test app where a short sound is played repeatedly up to
about 320 times a minute. I want to allow the user to adjust the
volume, so tried out the QTKit framework, as I'm not up to using
CoreAudio. But the sound randomly cracks up and loses volume (both
happen at once).
Not sure if this is a known problem or a programmer error(!).
Here's how I get the sound:
QTMovie *sound;
sound = [[[QTMovie alloc] initWithFile:filePath error:nil];
Then in a callback for NSTimer:
[sound play];
Things work for a while, then random cracks/distortions/volume fades
occur. I've gotten a few other people to test, and the problem
manifests on various machine types with no apparent pattern. That
is, one MacBook Pro has the problem, one doesn't; one G4 doesn't have
the problem, while another does. In fact, the problem occurred on my
machine a few months ago, but I recently tried out the same test
project to see if I could fix it, but now no problem on my machine!
Would anyone have any ideas, or could direct me to the correct mail
list. I haven't yet tried the Quick Time lists because I'm not sure
if this is a Quick Time problem or a QTKit problem.
TIA,
Ron
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