avcaptureoutput

AVCaptureStillImageOutput & UIImagePNGRepresentation

由 北城余情 提交于 2019-12-13 07:07:56
问题 I am having a hard time for something I think shouldn’t be so difficult, so I presume I must be looking at the problem from the wrong angle. In order to understand how AVCaptureStillImageOutput and the camera work I made a tiny app. This app is able to take a picture and save it as a PNG file (I do not want JPEG). The next time the app is launched, it checks if a file is present and if it is, the image stored inside the file is used as the background view of the app. The idea is rather simple

AVCaptureStillImageOutput area selection

由 拥有回忆 提交于 2019-12-12 19:01:57
问题 Here is a challenge I am facing, when saving an image taken from the camera, in an iOS app written in Swift. I am not saving exactly what I want, I am saving more than necessary and it is not good. These are the two relevant chunks of code for this issue. First where the session starts, as one can see I am only looking at an ellipse-shaped area: previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) previewLayer?.frame = self.view.layer.frame self.view.layer.addSublayer

Deep Copy of CMImageBuffer or CVImageBuffer

由 血红的双手。 提交于 2019-12-02 07:11:46
问题 Hi I am currently working on an app which needs to capture a Video and at the same time should be able to take frames to blend them. The problem I am having is that my frames coming from: func captureOutput( captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection! ) will drop after blending about 10-12 frames. I tried blending every 10th frame but it will still drop after 10-12 blended frames. I know that I should

Deep Copy of CMImageBuffer or CVImageBuffer

由 僤鯓⒐⒋嵵緔 提交于 2019-12-02 03:59:44
Hi I am currently working on an app which needs to capture a Video and at the same time should be able to take frames to blend them. The problem I am having is that my frames coming from: func captureOutput( captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection! ) will drop after blending about 10-12 frames. I tried blending every 10th frame but it will still drop after 10-12 blended frames. I know that I should copy the CVImageBuffer to release the imageBuffer which I got using the following: let imageBuffer =

iOS: error in __connection_block_invoke_2: Connection interrupted [duplicate]

由 谁说我不能喝 提交于 2019-11-29 10:05:27
This question already has an answer here: What is “error in __connection_block_invoke_2: Connection interrupted” in iOS? 1 answer Xcode/iOS 8/AVFoundation related error in console: error in __connection_block_invoke_2: Connection interrupted I am just adding AVCaptureVideoDataOutput to Apple's sample app 'AVCamManualUsingtheManualCaptureAPI' What I added was: // CoreImage wants BGRA pixel format NSDictionary *outputSettings = @{ (id)kCVPixelBufferPixelFormatTypeKey : [NSNumber numberWithInteger:kCVPixelFormatType_32BGRA]}; // create and configure video data output AVCaptureVideoDataOutput

iOS: error in __connection_block_invoke_2: Connection interrupted [duplicate]

由 一个人想着一个人 提交于 2019-11-28 03:33:45
问题 This question already has an answer here : What is “error in __connection_block_invoke_2: Connection interrupted” in iOS? (1 answer) Closed 4 years ago . Xcode/iOS 8/AVFoundation related error in console: error in __connection_block_invoke_2: Connection interrupted I am just adding AVCaptureVideoDataOutput to Apple's sample app 'AVCamManualUsingtheManualCaptureAPI' What I added was: // CoreImage wants BGRA pixel format NSDictionary *outputSettings = @{ (id)kCVPixelBufferPixelFormatTypeKey :
订阅 avcaptureoutput