Extreme Crashing from QT Movie Layers in Core Animation
Extreme Crashing from QT Movie Layers in Core Animation
- Subject: Extreme Crashing from QT Movie Layers in Core Animation
- From: Seth Willits <email@hidden>
- Date: Fri, 6 Mar 2009 17:28:07 -0800
I really really really hate to cross-post this, but I'm not sure which
list to send this to.
I have an extremely simple application playing three QuickTime movies
in three QTMovieLayers. When the movie ends I simply restart it from
within the notification callback. That and fading the opacity of the
layers is the only remotely "tricky" thing I'm doing in the entire
application, but a client is report *weird* crashes on the final
machine the app will run on. (On my own, and other machines here and
there it works just fine).
The crash reports are at: http://www.sethwillits.com/temp/QTCoreAnimationCrashes.zip
One of the weird things is that there are hundreds of threads in each
report:
Thread 43:
0 libSystem.B.dylib 0x919b04e2 semaphore_wait_trap + 10
1 QuickTimeH264.scalar 0x2831a6eb JVTCompEncodeFrame +
3088012
2 ??? 0x262762e0 0 + 640115424
The actual crashed thread and stack are different in almost every one
of the 8 crashes I have. There's no pattern to it. One the stack
traces for the *entire* crashed thread is:
Thread 0 Crashed:
0 QuickTimeH264.scalar 0x28c55796 JVTCompEncodeFrame +
3284791
And it's thread 0 for crying out loud!
I'd bet the farm that it's not my fault, so really the only thing I
can think of is a crazy memory smashing bug somewhere in QT or Core
Animation.
Could anyone look at some of these and see if anything stands out?
I really have no idea what to do. ;'-(
--
Seth Willits
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