So I've setup CVPixelBuffer's and tied them to OpenGL FBOs successfully on iOS. But now trying to do the same on OSX has me snagged. The textures from CVOpenGLTextureCacheCreateTextureFromImage r...

I'm trying to figure out how the ownership works with the function CVMetalTextureGetTexture: CVMetalTextureRef textureRef; // ... textureRef is created id<MTLTexture> texture = CVMetalTextur...

I am attempting to perform a deep clone of CMSampleBuffer to store the output of a AVCaptureSession. I am receiving the error kCMSampleBufferError_InvalidMediaFormat (OSStatus -12743) when I run th...

Is there any way using AVFoundation and CoreVideo to get color info, aperture and focal length values in real-time? Let me explain. Say when I am shooting video I want to sample the color in a sma...

I have a project where I need to decode h264 video from a live network stream and eventually end up with a texture I can display in another framework (Unity3D) on iOS devices. I can successfully de...

In the UI of my iOS app, I display a complex hierarchy of CALayers. One of these layers is a AVPlayerLayer that displays a video with CIFilters applied in real time (using AVVideoComposition(asset:...

I have been following the apple's live stream camera editor code to get the hold of live video editing. So far so good, but I need a way out to crop a sample buffer into 4 pieces and then process...

I'm accessing the camera in iOS and using session presets as so: captureSession.sessionPreset = AVCaptureSessionPresetMedium; Pretty standard stuff. However, I'd like to know ahead of time the r...

I'm sure something's wrong with my buffer attributes, but it's not clear to me what -- it's not well documented what's supposed to go there, so I'm guessing based on CVPixelBufferPoolCreate -- and ...

I'm recording video and audio using AVCaptureVideoDataOutput and AVCaptureAudioDataOutput and in the captureOutput:didOutputSampleBuffer:fromConnection: delegate method, I want to draw text onto ea...

I am writing some video processing code using AVComposition. Giving only the necessary background details, I receive a CVPixelBuffer from an apple API that I do not control. This CVPixel buffer, co...

What's the difference between CVImageBuffer which is returned by CMSampleBufferGetmageBuffer and CVPixelBuffer? I just want to retrieve the image planes (RGBA) but I can't figure out how to retriev...

I get a CVPixelBuffer from ARSessionDelegate: func session(_ session: ARSession, didUpdate frame: ARFrame) { frame.capturedImage // CVPixelBufferRef } But another part of my app (that I can't c...

I have received a CMSampleBufferRef from a system API that contains CVPixelBufferRefs that are not RGBA (linear pixels). The buffer contains planar pixels (such as 420f aka kCVPixelFormatType_420Yp...

I'm creating a MTLTexture from CVImageBuffers (from camera and players) using CVMetalTextureCacheCreateTextureFromImage to get a CVMetalTexture and then CVMetalTextureGetTexture to get the MTLTextu...

Is there a way to list all CVPixelBuffer formats for CVPixelBufferCreate() that will not generate error -6683: kCVReturnPixelBufferNotOpenGLCompatible when used with CVOpenGLESTextureCacheCreateTex...

According to Apple docs, it's an image stored in main memory, but how are those images used to make a movie?

I'm trying to render I420 (YCbCr planner) via MetalKit most of examples are using the CMSampleBuffer which from Camera, but my goal is using a given I420 bytes. I do something like this: let da...

I am trying to convert a pixelBuffer extracted from AVPlayerItemVideoOutput to CIImage but always getting nil. The Code if([videoOutput_ hasNewPixelBufferForItemTime:player_.internalPlayer.curren...

I'm refactoring my iOS OpenGL-based rendering pipeline. My pipeline consist of many rendering steps, hence I need a lot of intermediate textures to render to and read from. Those textures are of va...

I'm trying to rotate a video to its correct orientation using an AVAssetExportSession and I always get the following error: Error Domain=AVFoundationErrorDomain Code=-11841 "The operation couldn’t...

I am trying to create a 3-channel CVOpenGLESTexture in iOS. I can successfully create a single-channel texture by specifying kCVPixelFormatType_OneComponent8 in CVPixelBufferCreate() and GL_LUMINA...

I'm looking for a way to retrieve the individual frames of a video using iOS API. I tried using AVAssetImageGenerator but it seems to only provide frame to the nearest second which is a bit too rou...

I'm trying to place some text of a part of a video that I'm creating. I realize that I can use a layer with text over an entire length of the video using CALayers, but how do I do it over only par...

We are using AVAssetReader and AVAssetWriter somewhat in the style as noted in Video Encoding using AVAssetWriter - CRASHES basically to read a video what we got from the photo gallery / asset libr...