原因：导入视频文件，转换和创建日期时，'无法分叉：错误35'

Question

我正在尝试使用ipad上的sdcard reader从sdCard导入文件。从卡中导入mts文件时，我将它们转换为mov格式并将其保存到应用程序的文档目录中。如果我不调用下面提到的函数来获取日期，它会完全转换文件。当我在导入时调用此函数来获取视频文件的创建日期。它崩溃并给出以下堆栈跟踪....

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'couldn't fork: errno 35'
*** Call stack at first throw:
(
    0   CoreFoundation                      0x32fba64f __exceptionPreprocess + 114
    1   libobjc.A.dylib                     0x35992c5d objc_exception_throw + 24
    2   CoreFoundation                      0x32fba491 +[NSException raise:format:arguments:] + 68
    3   CoreFoundation                      0x32fba4cb +[NSException raise:format:] + 34
    4   Foundation                          0x3582be8f -[NSConcreteTask launchWithDictionary:] + 2138
    5   Foundation                          0x3582af57 -[NSConcreteTask launch] + 22
    6   IRVideoEditor                       0x0002f917 +[IRVideoManager getCreatedDate:] + 358
    7   IRVideoEditor                       0x0002f65d +[IRVideoManager duplicateExists:] + 240
    8   IRVideoEditor                       0x0002d6c9 -[IRVideoEncoder wrapVideos] + 752
    9   IRVideoEditor                       0x00016d27 -[ImportVideoViewController importVideo] + 170
    10  Foundation                          0x357b0389 -[NSThread main] + 44
    11  Foundation                          0x358225cd __NSThread__main__ + 972
    12  libsystem_c.dylib                   0x36539311 _pthread_start + 248
    13  libsystem_c.dylib                   0x3653abbc start_wqthread + 0
)
terminate called after throwing an instance of 'NSException'

bellow是代码，我用来使用nstask获取日期

NSPipe * pipe = [NSPipe pipe];

    task = [[NSTask alloc] init];


    [task setLaunchPath: @"/bin/sh"];


    NSArray *arguments = [NSArray arrayWithObjects:@"-c", [NSString stringWithFormat:@"stat -c %%y %@", filePath], nil]; // iPad stat

    [task setArguments: arguments];

    [task setStandardOutput:pipe];

    [task setStandardError:[NSPipe pipe]];

// [[NSNotificationCenter defaultCenter] addObserver：self selector：@selector（taskExited :) name：NSTaskDidTerminateNotification object：task];         [任务启动];         // [task waitUntilExit];

    NSString * date = [[[NSString alloc] initWithData:[[pipe fileHandleForReading] availableData] encoding:NSASCIIStringEncoding] autorelease];
    return date;