如何在iPhone中捕捉视频

Question

我正在iPhone中创建视频应用程序的应用程序,但我不知道如何在iPhone中捕获视频; 我想将它们存储在SQLite数据库中,但我有一个问题:我可以在SQLite数据库中保存直接视频吗？是可能的,还是我必须存储视频的路径？如果我必须在SQLite数据库中保存路径,那么我该怎么做呢？请帮助解决这个问题.

Answer 1

只有iPhone 3GS及以上版本支持视频录制.因此,您应首先检查是否支持录制,然后使用以下代码启动为属性设置所需值的摄像机.
您将拥有"MobileCoreServices/MobileCoreServices.h"来运行此代码.

            if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {              
                UIImagePickerController *videoRecorder = [[UIImagePickerController alloc]init];         
                NSArray *sourceTypes = [UIImagePickerController availableMediaTypesForSourceType:videoRecorder.sourceType];
                NSLog(@"Available types for source as camera = %@", sourceTypes);
                if (![sourceTypes containsObject:(NSString*)kUTTypeMovie] ) {
                    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil 
                                                                    message:@"Device Not Supported for video Recording."                                                                       delegate:self 
                                                          cancelButtonTitle:@"Yes" 
                                                          otherButtonTitles:@"No",nil];
                    [alert show];
                    [alert release];
                    return;
                }
                videoRecorder.sourceType = UIImagePickerControllerSourceTypeCamera;
                videoRecorder.mediaTypes = [NSArray arrayWithObject:(NSString*)kUTTypeMovie];           
                videoRecorder.videoQuality = UIImagePickerControllerQualityTypeLow;
                videoRecorder.videoMaximumDuration = 120;
                videoRecorder.delegate = self;
                self.recorder_ = videoRecorder;                 
                [videoRecorder release];
                [self presentModalViewController:self.recorder_ animated:YES];                  
            }

然后你应该实现以下委托方法来保存捕获的视频.在SQL/coredata中进行视频路径是理想的,而不是将整个视频文件存储在其中.

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
 if ([type isEqualToString:(NSString *)kUTTypeVideo] || 
    [type isEqualToString:(NSString *)kUTTypeMovie]) { // movie != video
    NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
    NSData *videoData = [NSData dataWithContentsOfURL:videoUrl];
    NSString *videoStoragePath;//Set your video storage path to this variable
    [videoData writeToFile:videoStoragePath atomically:YES];
    //You can store the path of the saved video file in sqlite/coredata here.
}
}

希望这可以帮助.