我正在尝试使用MPMoviePlayerController从选定的视频文件中提取多个图像.以下是我写的代码.
movie = [[MPMoviePlayerController alloc] initWithContentURL:[info objectForKey:UIImagePickerControllerMediaURL]]; NSNumber *time1 = [NSNumber numberWithInt:1]; NSNumber *time2 = [NSNumber numberWithInt:3]; NSNumber *time3 = [NSNumber numberWithInt:5]; NSArray *times = [NSArray arrayWithObjects:time1,time2,time3,nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleThumbnailImageRequestFinishNotification:) name:MPMoviePlayerThumbnailImageRequestDidFinishNotification object:movie]; [movie requestThumbnailImagesAtTimes:times timeOption:MPMovieTimeOptionExact];
这是通知的处理程序
-(void)handleThumbnailImageRequestFinishNotification:(NSNotification*)note
{
NSDictionary *userinfo = [note userInfo];
NSError* value = [userinfo objectForKey:MPMoviePlayerThumbnailErrorKey];
if (value!=nil)
{
NSLog(@"Error: %@",[value debugDescription]);
}
else
{
_imageView.image = [userinfo valueForKey:MPMoviePlayerThumbnailImageKey];
}
}
但是我收到以下错误消息：
Error: Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo=0x1d8a63d0 {NSLocalizedDescription=The operation could not be completed,NSUnderlyingError=0x1d8b7b50 "The operation couldn’t be completed. (OSStatus error -12433.)",NSLocalizedFailureReason=An unknown error occurred (-12433)}
有人知道OSStatus Error -12433的描述吗？我尝试搜索有关OSStatus错误代码的文档,但未成功.
任何帮助将不胜感激.
解决方法
我不得不把时间添加为花车所以：
NSNumber *time1 = [NSNumber numberWithFloat:1.f];
