Re: QTMovieLayer and QCCompositionLayer Don't Start
Re: QTMovieLayer and QCCompositionLayer Don't Start
- Subject: Re: QTMovieLayer and QCCompositionLayer Don't Start
- From: David Duncan <email@hidden>
- Date: Tue, 6 Jan 2009 13:03:49 -0800
On Jan 6, 2009, at 11:53 AM, Gordon Apple wrote:
Note: There is no equivalent to "play" for a composition (at least
that I
am aware of). I get the initial frame and no play. My composition
layer is
four levels deep:
viewLayer:contentLayer:attentionLayer:compositionLayer.
Other stuff, including movieLayers, work fine at that level. I'm
using
standard compositions (plus one of my own derived from the tutorial)
which
all play just fine independently and in Quartz Composer.
Are you changing the asynchronous property of the QCCompositionLayer?
Is there something about " composition tracks the Core Animation
layer time"
that I am missing, on need to include? I notice that all of the
sample code
includes animating some parameter. I just want the composition to
play. Do
I need to be feeding it an animation "clock" signal to make it play?
Try replacing the composition in the CALayerEssentials sample <http://developer.apple.com/samplecode/CALayerEssentials/index.html
>
If it fails there, then there may be something stranger going on. If
not, determining how to replicate the issue from there and filing a
bug report may be your best option.
--
David Duncan
Apple DTS Animation and Printing
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