![]() (void)captureOutput:(QTCaptureOutput *)captureOutput didOutputAudioSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection #pragma mark = Audio capture methods =Ĭalled periodically by the QTCaptureAudioDataOutput as it receives QTSampleBuffer objects containing audio frames captured by the QTCaptureSession.Įach QTSampleBuffer will contain multiple frames of audio encoded in the canonical non-interleaved linear PCM format compatible with AudioUnits. (void)windowWillClose:(NSNotification *)notification ![]() * Become the window's delegate so that the capture session can be stopped and cleaned up immediately after the window is closed. This will cause the audo data output delegate method to be called for each new audio buffer that is captured from the input device. RenderCallbackStruct.inputProcRefCon = self Įrr = AudioUnitSetProperty(effectAudioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &renderCallbackStruct, sizeof(renderCallbackStruct)) ĪudioComponentInstanceDispose(effectAudioUnit) RenderCallbackStruct.inputProc = PushCurrentInputBufferIntoAudioUnit */ĪURenderCallbackStruct renderCallbackStruct * Set a callback on the effect unit that will supply the audio buffers received from the audio data output. */ĪudioComponentDescription effectAudioUnitComponentDescription ĮponentType = kAudioUnitType_Effect ĮponentSubType = kAudioUnitSubType_Delay ĮponentManufacturer = kAudioUnitManufacturer_Apple ĮponentFlags = 0 ĮponentFlagsMask = 0 ĪudioComponent effectAudioUnitComponent = AudioComponentFindNext(NULL, &effectAudioUnitComponentDescription) Įrr = AudioComponentInstanceNew(effectAudioUnitComponent, &effectAudioUnit) * Create an effect audio unit to add an effect to the audio before it is written to a file. * Captured audio buffers will be provided to the delegate via the captureOutput:didOutputAudioSampleBuffer:fromConnection: delegate method. * Create an audio data output for reading captured audio buffers and add it to the capture session. */ĬaptureAudioDeviceInput = initWithDevice:audioDevice] * Add a device input for the audio device to the session. Set a callback on the effect unit that will supply the audio buffers received from the audio data output.Create an audio data output for reading captured audio buffers and add it to the capture session.Add a device input for the audio device to the session.Note: I've gone through all StackOverflow questions I could find on the subject, two questions came close, but they do not solve this issue. (I've tried logging all I could think of, but I receive no errors from any of the QTKit methods I invoke). What do I need to add/change, in order to get my microscope to work with MyRecorder ? MCaptureAudioDeviceInput = initWithDevice:audioDevice] MCaptureVideoDeviceInput = initWithDevice:videoDevice] QTCaptureDevice *videoDevice = īOOL success = Here's the stripped down MyRecorder (for a better overview): - (void)awakeFromNib ![]() MiXscope also works with both cameras (it seems it uses the sequence grabber). The sequence grabber demo works with both cameras. If I open QuickTime Player and create a movie recording, I get the error message: "Recording failed because no data was received.|Make sure that the media input source is turned on and playing." MyRecorder works fine with my low-cost WebCam, but it only displays black video when I connect the microscope instead. I want to use the USB microscope with Mac OS X 10.5 and QTKit. The microscope is actually just another WebCam. One is a low-cost WebCam, the other is a low-cost USB microscope both bought from eBay.
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