无法与qtkitserver通信:连接无效

Question

在Mountain Lion(全新安装而不是从10.6或10.7升级),我在尝试创建QTMovie时面临问题,但有以下例外:

2012-08-17 15:34:49.434 DemoApp[15995:303] Failed to communicate with qtkitserver:      
Connection invalid
2012-08-17 15:34:49.434 DemoApp [15995:303] Failed to initializeServer(), returned 5
2012-08-17 15:34:55.614 DemoApp [15995:303] Error -  Error Domain=NSOSStatusErrorDomain   Code=-2012 
 "The movie contains an invalid data reference." (invalidDataRef) 
 UserInfo=0x108ae9ca0 {NSLocalizedDescription=The movie contains an invalid data reference.}

我的代码如下:

        NSError *error = nil;

        movie = [QTMovie movieWithURL:mediaURL error:&error];

        NSLog(@"Error -  %@", error);

但"电影"对象是零.谁可以帮我这个事.

提前致谢,