Question

我已经设置了一个可以使用AVFoundation拍摄照片的会话，并且我有一个自定义相机，所以我没有使用默认的选择器控制器。如何添加录制视频选项？

在按钮上，我添加了一个手势，可以检测是否已经按住，这应该开始视频录制。我先发布用于图像捕获的代码，然后发布我尝试用于视频捕获的代码。很抱歉提前发帖

照片捕捉代码：

（查看确实加载）

session = [[AVCaptureSession alloc]init];
[session setSessionPreset:AVCaptureSessionPresetHigh];
inputDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError * error;
deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:inputDevice error:&error];

if([session canAddInput:deviceInput])
{
    [session addInput:deviceInput];
}


previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
[previewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
CALayer * rootLayer = [myImageView layer];
[rootLayer setMasksToBounds:YES];
CGRect frame = CGRectMake(0,0,400,800);
[previewLayer setFrame:frame];

[rootLayer insertSublayer:previewLayer atIndex:0];
stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
NSDictionary * outputSettings = [[ NSDictionary alloc] initWithObjectsAndKeys:AVVideoCodecJPEG, AVVideoCodecKey, nil];
[stillImageOutput setOutputSettings:outputSettings];
[session addOutput:stillImageOutput];
movieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
[session startRunning];

（按钮方式）

AVCaptureConnection * videoConnection = nil;
for(AVCaptureConnection * connection in stillImageOutput.connections)
{
    for(AVCaptureInputPort * port in [connection inputPorts])
    {
        if([[port mediaType] isEqual:AVMediaTypeVideo])
        {
            videoConnection = connection;
            break;
        }
    }
    if(videoConnection)
    {
        break;
    }
}
[stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
    if(imageDataSampleBuffer != NULL)
    {
        NSData * imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
        UIImage * image2 = [UIImage imageWithData:imageData];
        myImageView.image= image2;
        previewLayer.hidden = YES;
        [self didFinishSelectingPhoto];
    }
}];

视频捕获代码（不起作用）

- (void)doAction:(UILongPressGestureRecognizer *)recognizer {

if (recognizer.state == UIGestureRecognizerStateBegan) {

    //start video
      [session beginConfiguration];
    AVCaptureDevice *videoCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    AVCaptureDeviceInput *videoInput = [[AVCaptureDeviceInput alloc] initWithDevice:videoCaptureDevice error:nil];



    AVCaptureSession *session = [[AVCaptureSession alloc] init];
    [session addInput:videoInput];
    [session addOutput:movieFileOutput];

    [session commitConfiguration];
    [self startRecording];
    }
}

- (void)startRecording
{

[movieFileOutput startRecordingToOutputFileURL:[self tempFileURL]
                                    recordingDelegate:self];
}


- (void) stopRecording
{
 NSLog(@"stop recording");
[movieFileOutput stopRecording];
}

- (NSURL *) tempFileURL
{

NSString *outputPath = [[NSString alloc] initWithFormat:@"%@%@", NSTemporaryDirectory(), @"output.mov"];
NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputPath];
NSFileManager *fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:outputPath]) {
    NSLog(@"file saved");
}

return outputURL;
}

Answer 1

请阅读apple文档和this他们有关于如何使用AVCaptureSession捕获视频的明确说明。希望这会有所帮助。

如何将视频录制添加到图像捕获会话

1 个答案: