New Avfoundation Video Capture Module For Mac

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@@ -302,17 +302,24 @@ if(WIN32) endif endif( WIN32) # - Apple AV Foundation - # - Apple AV Foundation (iOS) - if(WITHAVFOUNDATION) set(HAVEAVFOUNDATION YES) endif # - QuickTime - # - Apple AV Foundation (Mac) - if(WITHAVFOUNDATIONMAC) set(HAVEAVFOUNDATIONMAC YES) endif # - QuickTime, Apple AV Foundation (Mac) - if ( NOT IOS) if(WITHQUICKTIME) set(HAVEQUICKTIME YES) elseif( APPLE AND CMAKECOMPILERISCLANGCXX) elseif( WITHQTKIT) set(HAVEQTKIT YES) elseif(APPLE AND CMAKECOMPILERISCLANGCXX) set(HAVEAVFOUNDATIONMAC YES) endif endif. @@ -46,12 +46,13 @@ using namespace std; using namespace testing; using namespace perf; # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEFFMPEG) # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEAVFOUNDATIONMAC) defined(HAVEFFMPEG) defined(WIN32) /.

  1. Comment on attachment 8751170 WIP-02-use-AVFoundation-for-camera-capture-on-OSX.patch Review of attachment 8751170: ----- All new files look like upstream code, so I skimmed those. The rest of the changes looks good.
  2. I am new bie to MAC OSX development. I wanted to capture video as raw frames using AVFoundation on OSX 10.7. I am not understanding setting specific video resolution to camera device, somehow I setted using VideoSettings, but if I set 320x240, it is capturing at 320x176.

assume that we have ffmpeg./ # define BUILDWITHVIDEOINPUTSUPPORT 1. @@ -46,12 +46,13 @@ using namespace cvtest; # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEFFMPEG) # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEAVFOUNDATIONMAC) defined(HAVEFFMPEG) defined(WIN32) /. assume that we have ffmpeg./ # define BUILDWITHVIDEOINPUTSUPPORT 1. @@ -47,12 +47,13 @@ using namespace std; using namespace testing; using namespace perf; # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEFFMPEG) # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEAVFOUNDATIONMAC) defined(HAVEFFMPEG) defined(WIN32) /.

AVFoundation allows you to create custom playback and capture solutions for audio, video and still images. The advantage of using AVFoundation instead of the out-of-the-shelf solutions such as the UIImagePickerController, is that you get access to the single camera pixels.

New Avfoundation Video Capture Module For Mac Free

assume that we have ffmpeg./ # define BUILDWITHVIDEOINPUTSUPPORT 1. @@ -50,12 +50,13 @@ using namespace std; using namespace testing; using namespace perf; # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEFFMPEG) # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEAVFOUNDATIONMAC) defined(HAVEFFMPEG) defined(WIN32) /. assume that we have ffmpeg./ # define BUILDWITHVIDEOINPUTSUPPORT 1. @@ -59,13 +59,14 @@ # include 'cvconfig.h ' # include './src/inputarrayutility.hpp ' # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEFFMPEG) defined(HAVEMSMF) # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEQTKIT) defined(HAVEAVFOUNDATION) defined(HAVEAVFOUNDATIONMAC) defined(HAVEFFMPEG) defined(HAVEMSMF) defined(HAVEVFW) # define BUILDWITHVIDEOINPUTSUPPORT 1 # else. @@ -3,11 +3,12 @@ # ifdef HAVEOPENCL # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEAVFOUNDATION) defined(HAVEFFMPEG) # if defined(HAVEXINE) defined(HAVEGSTREAMER) defined(HAVEQUICKTIME) defined(HAVEAVFOUNDATION) defined(HAVEAVFOUNDATIONMAC) defined(HAVEFFMPEG) defined(WIN32) # define BUILDWITHVIDEOINPUTSUPPORT 1 @@ -117,4 +118,4 @@ OCLPERFTESTP(MOG2GetBackgroundImage, Mog2, Combine(Values('gpu/video/768x576 // namespace cvtest::ocl # endif # endif # endif. Add this suggestion to a batch that can be applied as a single commit.

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The answer by user692178 works. But a cleaner approach would be to set kCVPixelBufferWidthKey and kCVPixelBufferHeightKey options on AVCaptureVideoDataOutput object. Then there won't be need to get exclusive access to device by calling AVCaptureDevice lockForConfigration before starting AVCaptureSession. Minimal sample as below. In AVCaptureDevice there are two properties. Formats and activeFormat. Format will return an NSArrary of AVCaptureDeviceFormat with contains all formats exposed by cam.

New avfoundation video capture module for mac mac

You select any one format from this list and set it to activeFormat. Make sure that you set the format after you receive the exclusive access to the devlce by calling AVCaptureDevice lockForConfigration. After you set the format release the lock with AVCaptureDevice unlockForConfigration. Then start the AVCaptureSession which will give you the video frames of the format you set. AVCaptureFormat is a wraper for CMFormatDescription. CMVideoFotmatDescription is the concreete subclass of CMFormatDescription.

Use CMVideoFormatDescriptionGetDimentions to get the width and height in the set format. Use CMFormatDescriptionGetMediaSubType to get the video codec. For raw fotmats video codec mostly is yuvs or vuy2. For compressed formats its h264, dmb1(mjpeg) and many more.

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