14

我成功地发送了一个 NSData 流。下面的委托方法是获取该流并附加到 NSMutableData self.data。如何获取这些数据并将其转换为 UIView/AVCaptureVideoPreviewLayer（应该显示视频）？我觉得我错过了另一个转换， AVCaptureSession > NSStream > MCSession > NSStream > ？

- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode {
    switch(eventCode) {
        case NSStreamEventHasBytesAvailable:
        {
            if(!self.data) {
                self.data = [NSMutableData data];
            }
            uint8_t buf[1024];
            unsigned int len = 0;
            len = [(NSInputStream *)stream read:buf maxLength:1024];
            if(len) {
                [self.data appendBytes:(const void *)buf length:len];
            } else {
                NSLog(@"no buffer!");
            }

// Code here to take self.data and convert the NSData to UIView/Video
}

我用这个发送流：

-(void) captureOutput:(AVCaptureOutput*)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection*)connection
{

    CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
    CVPixelBufferLockBaseAddress(imageBuffer,0);

    size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
//    size_t width = CVPixelBufferGetWidth(imageBuffer);
    size_t height = CVPixelBufferGetHeight(imageBuffer);
    void *src_buff = CVPixelBufferGetBaseAddress(imageBuffer);

    NSData *data = [NSData dataWithBytes:src_buff length:bytesPerRow * height];

    CVPixelBufferUnlockBaseAddress(imageBuffer, 0);


    NSError *error;
    self.oStream = [self.mySession startStreamWithName:@"videoOut" toPeer:[[self.mySession connectedPeers]objectAtIndex:0] error:&error];
    self.oStream.delegate = self;
    [self.oStream scheduleInRunLoop:[NSRunLoop mainRunLoop]
                            forMode:NSDefaultRunLoopMode];
    [self.oStream open];

    [self.oStream write:[data bytes] maxLength:[data length]];






//    CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer( sampleBuffer );

    CGSize imageSize = CVImageBufferGetEncodedSize( imageBuffer );
    // also in the 'mediaSpecific' dict of the sampleBuffer

    NSLog( @"frame captured at %.fx%.f", imageSize.width, imageSize.height );
}
4

2 回答 2

1

我认为你需要AVCaptureManager，看看下面的代码是否适合你..

AVCamCaptureManager *manager = [[AVCamCaptureManager alloc] init];
[self setCaptureManager:manager];

[[self captureManager] setDelegate:self];

if ([[self captureManager] setupSession]) {
     // Create video preview layer and add it to the UI
    AVCaptureVideoPreviewLayer *newCaptureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:[[self captureManager] session]];
    UIView *view = self.videoPreviewView;//Add a view in XIB where you want to show video
    CALayer *viewLayer = [view layer];
    [viewLayer setMasksToBounds:YES];
    CGRect bounds = [view bounds];

    [newCaptureVideoPreviewLayer setFrame:bounds];

    [newCaptureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];

    [viewLayer insertSublayer:newCaptureVideoPreviewLayer below:[[viewLayer sublayers] objectAtIndex:0]];

    [self setCaptureVideoPreviewLayer:newCaptureVideoPreviewLayer];

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        [[[self captureManager] session] startRunning];
    });
}

管理代表

- (void)captureManager:(AVCamCaptureManager *)captureManager didFailWithError:(NSError *)error
{

}

- (void)captureManagerRecordingBegan:(AVCamCaptureManager *)captureManager
{

}

- (void)captureManagerRecordingFinished:(AVCamCaptureManager *)captureManager outputURL:(NSURL *)url
{



}

- (void)captureManagerStillImageCaptured:(AVCamCaptureManager *)captureManager
{



}

- (void)captureManagerDeviceConfigurationChanged:(AVCamCaptureManager *)captureManager
{

}

我希望它有所帮助。

于 2014-03-21T20:11:53.197 回答
-2

您可以在您的处理事件上创建一个 UIImageView，如下所示：

UIImageView * iv = [[UIImageView alloc] initWithImage: [UIImage imageWithData: self.data];

你也可以只分配一次，然后调用 init。

每次您从套接字接收时，您都会初始化 UIImageView，您可以将其添加到 UIView 中。

对不起我的英语，我不知道我是否听懂了你

于 2014-03-21T11:51:15.277 回答