public override void ViewDidLoad()
{
base.ViewDidLoad();
// Initialize the class responsible for managing AV capture session and asset writer
videoProcessor = new RosyWriterVideoProcessor();
// Keep track of changes to the device orientation so we can update the video processor
var notificationCenter = NSNotificationCenter.DefaultCenter;
notificationCenter.AddObserver(UIApplication.DidChangeStatusBarOrientationNotification, DeviceOrientationDidChange);
UIDevice.CurrentDevice.BeginGeneratingDeviceOrientationNotifications();
// Setup and start the capture session
videoProcessor.SetupAndStartCaptureSession();
Console.WriteLine("Finished Setting up AV");
notificationCenter.AddObserver(UIApplication.DidBecomeActiveNotification, On_ApplicationDidBecomeActive);
oglView = new RosyWriterPreviewWindow(RectangleF.Empty);
// Our interface is always in portrait
oglView.Transform = videoProcessor.TransformFromCurrentVideoOrientationToOrientation(AVCaptureVideoOrientation.Portrait);
RectangleF bounds = viewPreview.ConvertRectToView(viewPreview.Bounds, oglView);
oglView.Bounds = bounds;
oglView.Center = new PointF(viewPreview.Bounds.Size.Width / 2.0F, viewPreview.Bounds.Size.Height / 2.0F);
viewPreview.AddSubview(oglView);
Console.WriteLine("Added OGL View");
// Set up labels
shouldShowStats = true;
frameRateLabel = LabelWithText(string.Empty, 10.0F);
viewPreview.AddSubview(frameRateLabel);
dimensionsLabel = LabelWithText(string.Empty, 54.0F);
viewPreview.AddSubview(dimensionsLabel);
typeLabel = LabelWithText(string.Empty, 90F);
viewPreview.Add(typeLabel);
// btnRecord Event Handler
btnRecord.Clicked += On_ToggleRecording;
// Video Processor Event Handlers
videoProcessor.RecordingDidStart += On_RecordingDidStart;
videoProcessor.RecordingDidStop += On_RecordingDidStop;
videoProcessor.RecordingWillStart += On_RecordingWillStart;
videoProcessor.RecordingWillStop += On_RecordingWillStop;
videoProcessor.PixelBufferReadyForDisplay += On_PixelBufferReadyForDisplay;
Console.WriteLine("Finished OnDidLoad");
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
statisticView.Layer.CornerRadius = 4f;
// Initialize the class responsible for managing AV capture session and asset writer
videoProcessor = new RosyWriterVideoProcessor();
// Setup and start the capture session
var isSupported = videoProcessor.SetupAndStartCaptureSession();
if (isSupported)
{
// Our interface is always in portrait
previewView.Transform = videoProcessor.TransformFromCurrentVideoOrientationToOrientation(AVCaptureVideoOrientation.Portrait);
previewView.Bounds = View.ConvertRectToView(View.Bounds, previewView);
previewView.Center = new CGPoint(View.Bounds.Size.Width / 2f, View.Bounds.Size.Height / 2f);
UIApplication.Notifications.ObserveDidBecomeActive(OnApplicationDidBecomeActive);
// Set up labels
shouldShowStats = true;
// Video Processor Event Handlers
videoProcessor.RecordingDidStart += OnRecordingDidStart;
videoProcessor.RecordingDidStop += OnRecordingDidStop;
videoProcessor.RecordingWillStart += OnRecordingWillStart;
videoProcessor.RecordingWillStop += OnRecordingWillStop;
videoProcessor.PixelBufferReadyForDisplay += OnPixelBufferReadyForDisplay;
}
else
{
errorLabel.Hidden = false;
previewView.Hidden = true;
recordButton.Enabled = false;
}
}
public bool SetupAssetWriterVideoInput(CMFormatDescription currentFormatDescription)
{
Console.WriteLine("Setting up Video Asset Writer");
float bitsPerPixel;
var dimensions = currentFormatDescription.VideoDimensions;
int numPixels = dimensions.Width * dimensions.Height;
int bitsPerSecond;
// Assume that lower-than-SD resolution are intended for streaming, and use a lower bitrate
if (numPixels < (640 * 480))
{
bitsPerPixel = 4.05F; // This bitrate matches the quality produced by AVCaptureSessionPresetMedium or Low.
}
else
{
bitsPerPixel = 11.4F; // This bitrate matches the quality produced by AVCaptureSessionPresetHigh.
}
bitsPerSecond = Convert.ToInt32((float)numPixels * bitsPerPixel);
NSDictionary videoCompressionSettings = NSDictionary.FromObjectsAndKeys(
new NSObject[]
{ // The Compression Settings Values
AVVideo.CodecH264,
NSNumber.FromInt32(dimensions.Width),
NSNumber.FromInt32(dimensions.Height),
NSDictionary.FromObjectsAndKeys(
new object[]
{ // Compression Property Values
NSNumber.FromInt32(bitsPerSecond),
NSNumber.FromInt32(30)
},
new object[]
{ // Compression Property Keys
AVVideo.AverageBitRateKey,
AVVideo.MaxKeyFrameIntervalKey
})
},
new NSObject[]
{ // The Compression Settings Keys
AVVideo.CodecKey,
AVVideo.WidthKey,
AVVideo.HeightKey,
AVVideo.CompressionPropertiesKey
}
);
if (processor.assetWriter.CanApplyOutputSettings(videoCompressionSettings, AVMediaType.Video))
{
processor.assetWriterVideoIn = new AVAssetWriterInput(AVMediaType.Video, videoCompressionSettings);
processor.assetWriterVideoIn.ExpectsMediaDataInRealTime = true;
processor.assetWriterVideoIn.Transform = processor.TransformFromCurrentVideoOrientationToOrientation(processor.ReferenceOrientation);
if (processor.assetWriter.CanAddInput(processor.assetWriterVideoIn))
{
processor.assetWriter.AddInput(processor.assetWriterVideoIn);
}
else
{
Console.WriteLine("Couldn't add asset writer video input.");
return(false);
}
}
else
{
Console.WriteLine("Couldn't apply video output settings.");
}
return(true);
}
public override void ViewDidLoad()
{
base.ViewDidLoad ();
// Initialize the class responsible for managing AV capture session and asset writer
videoProcessor = new RosyWriterVideoProcessor ();
// Keep track of changes to the device orientation so we can update the video processor
var notificationCenter = NSNotificationCenter.DefaultCenter;
notificationCenter.AddObserver(UIApplication.DidChangeStatusBarOrientationNotification, DeviceOrientationDidChange);
UIDevice.CurrentDevice.BeginGeneratingDeviceOrientationNotifications ();
// Setup and start the capture session
videoProcessor.SetupAndStartCaptureSession ();
notificationCenter.AddObserver (UIApplication.DidBecomeActiveNotification, OnApplicationDidBecomeActive);
oglView = new RosyWriterPreviewWindow(CGRect.Empty);
// Our interface is always in portrait
oglView.Transform = videoProcessor.TransformFromCurrentVideoOrientationToOrientation(AVCaptureVideoOrientation.Portrait);
CGRect bounds = previewView.ConvertRectToView(previewView.Bounds, oglView);
oglView.Bounds = bounds;
oglView.Center = new CGPoint(previewView.Bounds.Size.Width / 2.0F, previewView.Bounds.Size.Height / 2.0F);
previewView.AddSubview(oglView);
// Set up labels
shouldShowStats = true;
frameRateLabel = LabelWithText (string.Empty, 10.0F);
previewView.AddSubview (frameRateLabel);
dimensionsLabel = LabelWithText (string.Empty, 54.0F);
previewView.AddSubview (dimensionsLabel);
typeLabel = LabelWithText (string.Empty, 90F);
previewView.Add (typeLabel);
// btnRecord Event Handler
btnRecord.Clicked += OnToggleRecording;
// Video Processor Event Handlers
videoProcessor.RecordingDidStart += OnRecordingDidStart;
videoProcessor.RecordingDidStop += OnRecordingDidStop;
videoProcessor.RecordingWillStart += OnRecordingWillStart;
videoProcessor.RecordingWillStop += OnRecordingWillStop;
videoProcessor.PixelBufferReadyForDisplay += OnPixelBufferReadyForDisplay;
}
