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ASIFormDataRequest を使用してキャプチャ ビデオのフレームをアップロードすることはできますか?

私が持っているコード:

 - (void)viewDidLoad
    {
        [super viewDidLoad];

        frameCount = 0;
        [myQueue cancelAllOperations];
        [myQueue setDelegate:self];
        NSString *urlString = @"url";
        NSURL *url = [NSURL URLWithString:urlString];
        request = [ASIFormDataRequest requestWithURL:url];

        objReturner = [[ReturnerClass alloc] init];
        NSError *deviceError;
        AVCaptureDevice *cameraDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
        AVCaptureDeviceInput *inputDevice = [AVCaptureDeviceInput deviceInputWithDevice:cameraDevice error:&deviceError];

        // make output device
        AVCaptureVideoDataOutput *outputDevice = [[AVCaptureVideoDataOutput alloc] init];
        outputDevice.videoSettings = [NSDictionary dictionaryWithObject: [NSNumber numberWithInt:kCVPixelFormatType_32BGRA] forKey: (id)kCVPixelBufferPixelFormatTypeKey];
        [outputDevice setSampleBufferDelegate:self queue:dispatch_get_main_queue()];

        // initialize capture session
        self.captureSession = [[AVCaptureSession alloc] init];
        [self.captureSession addInput:inputDevice];
        [self.captureSession addOutput:outputDevice];

        // make preview layer and add so that camera's view is displayed on screen
        AVCaptureVideoPreviewLayer *previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:self.captureSession];
        previewLayer.frame = self.previewLayer.bounds;
        [self.previewLayer.layer addSublayer:previewLayer];
        [self.captureSession startRunning];

    }




-(void) captureOutput:(AVCaptureOutput*)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection*)connection
    {
        //[connection setVideoMinFrameDuration:CMTimeMake(1, 30)];
        /*We create an autorelease pool because as we are not in the main_queue our code is
         not executed in the main thread. So we have to create an autorelease pool for the thread we are in*/


        CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
        /*Lock the image buffer*/
        CVPixelBufferLockBaseAddress(imageBuffer,0);
        /*Get information about the image*/
        uint8_t *baseAddress = (uint8_t *)CVPixelBufferGetBaseAddress(imageBuffer);
        size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
        size_t width = CVPixelBufferGetWidth(imageBuffer);
        size_t height = CVPixelBufferGetHeight(imageBuffer);

        /*Create a CGImageRef from the CVImageBufferRef*/
        CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
        CGContextRef newContext = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
        CGImageRef newImage = CGBitmapContextCreateImage(newContext);

        /*We release some components*/
        CGContextRelease(newContext);
        CGColorSpaceRelease(colorSpace);

        /*We display the result on the custom layer. All the display stuff must be done in the main thread because
         UIKit is no thread safe, and as we are not in the main thread (remember we didn't use the main_queue)
         we use performSelectorOnMainThread to call our CALayer and tell it to display the CGImage.*/
        //[self.customLayer performSelectorOnMainThread:@selector(setContents:) withObject: (id) newImage waitUntilDone:YES];

        /*We display the result on the image view (We need to change the orientation of the image so that the video is displayed correctly).
         Same thing as for the CALayer we are not in the main thread so ...*/
        UIImage *image= [UIImage imageWithCGImage:newImage scale:1.0 orientation:UIImageOrientationRight];

        /*We relase the CGImageRef*/
        CGImageRelease(newImage);

        //[self.imageView performSelectorOnMainThread:@selector(setImage:) withObject:image waitUntilDone:YES];

        NSData *imageData = UIImageJPEGRepresentation(image,0.1);     //change Image to NSData



        [self sendFrameToServer:imageData];
        /*We unlock the  image buffer*/
        CVPixelBufferUnlockBaseAddress(imageBuffer,0);


    }


-(void)sendFrameToServer:(NSData *)imageData{
        [request setData:imageData withFileName:[NSString stringWithFormat:@"%i_%@.png",frameCount,[objReturner returnTimeStamp]] andContentType:@"image/png" forKey:@"imagetoupload"];
        [request startSynchronous];
        [myQueue addOperation:request];
        NSLog(@"Value: %@",[request responseString]);
        frameCount++;
    }

.h で myQueue と request オブジェクトを宣言しています

ここで私が抱えている問題は、NSLog 応答が常にサーバーに送信された最初の画像を表示することです。たとえば、「値: ファイル 0_2013-03-14 19:27:34.png がアップロードされました」のように変更されることはありません。これはずっと、frameCount が増加している間、日付の秒数も上がりません。

これに対する解決策はありますか？

4

1 に答える 1

1

次のような Delegate メソッドを使用して試してみてください。

-(void)sendFrameToserver:(NSData *)imageData {

    NSURL *url = [NSURL URLWithString:@"YOUR_URL_TO_POST"];
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
    [request setUseKeychainPersistence:YES];
    [request setData:imageData withFileName:[NSString stringWithFormat:@"%i_%@.png",frameCount,[objReturner returnTimeStamp]] andContentType:@"image/png" forKey:@"imagetoupload"];
    [request setDelegate:self];
    [request setDidFinishSelector:@selector(uploadRequestFinished:)];
    [request setDidFailSelector:@selector(uploadRequestFailed:)];
    [request startAsynchronous];

   }

次に、デリゲート メソッドを記述します。

- (void)uploadRequestFinished:(ASIHTTPRequest *)request{    

     NSString *responseString = [request responseString];
     NSLog( @"response--%@",responseString );

   }
 - (void)uploadRequestFailed:(ASIHTTPRequest *)request{

    NSLog(@" Error - Statistics file upload failed: \"%@\"",[[request error] localizedDescription]);

   }

お役に立てば幸いです....

于 2013-03-15T05:02:32.977 に答える