warning: Unable to read symbols for "/Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.2 (7B367)/Symbols/System/Library/VideoDecoders/VCH263.videodecoder" (file not found).warning: Unable to read symbols for "/Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.2 (7B367)/Symbols/System/Library/VideoDecoders/H264H2.videodecoder" (file not found).warning: Unable to read symbols for "/Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.2 (7B367)/Symbols/System/Library/VideoDecoders/MP4VH2.videodecoder" (file not found).warning: Unable to read symbols for "/Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.2 (7B367)/Symbols/System/Library/VideoDecoders/JPEGH1.videodecoder" (file not found).2011-2-28 16:16:15.145 app[3089:207] setting file:///private/var/mobile/Applications/46CE5456-6338-4CCD-B560-DCEFF700ACE0/tmp/MediaCache/ 在做ipad视频播放时候遇到的这么个问题，看了API文档，文档给出如下解释：
Important: In iOS 3.1 and earlier, a movie player always uses a system-supplied audio session.
To obtain that same behavior in iOS 3.2 and newer, you must set this property’s value to NO.
所以在3.2以后的ios系统中需要将
useApplicationAudioSession 设置为NO；
