iphone - descargar - AVCaptureVideoDataOutput y AVCaptureMovieFileOutput simultáneos

screen recorder ios 10

Question

Necesito poder tener AVCaptureVideoDataOutput y AVCaptureMovieFileOutput funcionando al mismo tiempo. El siguiente código funciona, sin embargo, la grabación de video no lo hace. Se didFinishRecordingToOutputFileAtURL delegado didFinishRecordingToOutputFileAtURL directamente después de startRecordingToOutputFileURL . Ahora, si AVCaptureVideoDataOutput de AVCaptureSession simplemente comentando la línea:

[captureSession addOutput:captureDataOutput];

La grabación de video funciona pero luego no se llama a SampleBufferDelegate (lo que necesito).

¿Cómo puedo hacer que AVCaptureVideoDataOutput y AVCaptureMovieFileOutput funcionen simultáneamente?

- (void)initCapture {
AVCaptureDeviceInput *captureInput = [AVCaptureDeviceInput deviceInputWithDevice:[AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo] error:NULL];
captureDataOutput = [[AVCaptureVideoDataOutput alloc] init];
[captureDataOutput setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
m_captureFileOutput = [[AVCaptureMovieFileOutput alloc] init];
NSString* key = (NSString*)kCVPixelBufferPixelFormatTypeKey;
NSNumber* value = [NSNumber numberWithUnsignedInt:kCVPixelFormatType_32BGRA];
NSDictionary* videoSettings = [NSDictionary dictionaryWithObject:value forKey:key];
[captureDataOutput setVideoSettings:videoSettings];
captureSession = [[AVCaptureSession alloc] init];
[captureSession addInput:captureInput];
[captureSession addOutput:m_captureFileOutput];
[captureSession addOutput:captureDataOutput];
[captureSession beginConfiguration];
[captureSession setSessionPreset:AVCaptureSessionPresetLow];
[captureSession commitConfiguration];
[self performSelector:@selector(startRecording) withObject:nil afterDelay:10.0];
[self performSelector:@selector(stopRecording) withObject:nil afterDelay:15.0];
[captureSession startRunning];
}
- (void) startRecording
{
[m_captureFileOutput startRecordingToOutputFileURL:[self tempFileURL] recordingDelegate:self];
}
- (void) stopRecording
{
if([m_captureFileOutput isRecording])
[m_captureFileOutput stopRecording];
}
- (NSURL *) tempFileURL
{
NSString *outputPath = [[NSString alloc] initWithFormat:@"%@%@", NSTemporaryDirectory(), @"camera.mov"];
NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputPath];
NSFileManager *fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:outputPath]) {
[[NSFileManager defaultManager] removeItemAtPath:outputPath error:nil];
[outputPath release];
return [outputURL autorelease];
}
- (void)captureOutput:(AVCaptureFileOutput *)captureOutput didStartRecordingToOutputFileAtURL:(NSURL *)fileURL fromConnections:(NSArray *)connections
{
NSLog(@"start record video");
}
- (void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error
{
NSLog(@"end record");
}
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection
{
// do stuff with sampleBuffer
}

Debo añadir que estoy recibiendo el error:

Error Domain=NSOSStatusErrorDomain Code=-12780 "The operation couldn’t be completed. (OSStatus error -12780.)" UserInfo=0x23fcd0 {AVErrorRecordingSuccessfullyFinishedKey=false}

desde

- (void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error

Aclamaciones

Answer 1

Aunque no puede usar AVCaptureVideoDataOutput , puede usar AVCaptureVideoPreviewLayer simultáneamente con AVCaptureMovieFileOutput . Vea el ejemplo de "AVCam" en el sitio web de Apple.

En Xamarin.iOS, el código se ve así:

var session = new AVCaptureSession();
var camera = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
var mic = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Audio);
if(camera == null || mic == null){
throw new Exception("Can''t find devices");
}
if(session.CanAddInput(camera)){
session.AddInput(camera);
}
if(session.CanAddInput(mic)){
session.AddInput(mic);
}
var layer = new AVCaptureVideoPreviewLayer(session);
layer.LayerVideoGravity = AVLayerVideoGravity.ResizeAspectFill;
layer.VideoGravity = AVCaptureVideoPreviewLayer.GravityResizeAspectFill;
cameraView = new UIView();
cameraView.Layer.AddSublayer(layer);
var filePath = System.IO.Path.Combine( Path.GetTempPath(), "temporary.mov");
var fileUrl = NSUrl.FromFilename( filePath );
var movieFileOutput = new AVCaptureMovieFileOutput();
var recordingDelegate = new MyRecordingDelegate();
session.AddOutput(movieFileOutput);
movieFileOutput.StartRecordingToOutputFile( fileUrl, recordingDelegate);

Answer 2

Me he contactado con un ingeniero de soporte de Apple y me dijo que AVCaptureVideoDataOutput AVCaptureMovieFileOutput uso simultáneo de AVCaptureVideoDataOutput + AVCaptureMovieFileOutput . No sé si lo apoyarán en el futuro, pero usó la palabra "no es compatible en este momento".

Lo invito a completar una solicitud de informe / función de error en esto, como hice yo (bugreport.apple.com), ya que miden cuán difícil es la gente que quiere algo y quizás podamos ver esto en un futuro cercano.