Qtkit Audio Channels

QTKit Capture - Apple Inc.

https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/QTKitApplicationProgrammingGuide/UsingQTKit/UsingQTKit.html

Technical Note TN2300: Transitioning QTKit Code to AV ...

https://developer.apple.com/library/archive/technotes/tn2300/_index.html

Problem with Unused Audio-Channels in QuickTime …

https://stackoverflow.com/questions/5378493/problem-with-unused-audio-channels-in-quicktime-capture

QTKit Architecture - Apple Developer

https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/QTKitApplicationProgrammingGuide/AnatomyoftheQTKFramework/AnatomyoftheQTKFramework.html

Question: Q: Quicktime Pro Applescript - Assign audio channels

https://discussions.apple.com/thread/6055790

Apparently QuickTime Player 7's AppleScript interface does not provide any means to modify audio channel layout assignment. Even with QTKit.framework [2], it seems only possible to get audio channel assigment information and not to set it. ... (* remap audio channel layouts.applescript v0.1 *) on run open (choose file with prompt ("Choose movie ...

Playing Audio Files with QTKit - meandmark.com

http://www.meandmark.com/qtkitaudiopart1.html

With QTKit you can use the same set of code to play any audio file whose format QuickTime supports. Apple introduced QTKit in Mac OS X 10.4. If you want to support earlier versions of Mac OS X, you must either use QuickTime’s C API, which I covered in a previous article , or use the NSMovie class.

ffmpeg - specify channel layout flags - Video Production ...

https://video.stackexchange.com/questions/16660/ffmpeg-specify-channel-layout-flags

I have the below file which I am re-mapping the audio and trying to set the channel layout flags on a Quicktime Prores file, but can't seem to get it working. I can successfully re-map the audio (from 8 discrete to 6 monos+stereo) but I can't seem to set the channel layout flags for the 6 monos and stereo, all the monos come out as 'Mono ...

QTKit | Cocoa Is My Girlfriend

http://www.cimgf.com/category/frameworks/qtkit/

Forget Mandelbrot sets (Apple coding headstarts) and Expression Trees. NSOperation is really not that hard. In his post, Marcus introduced how to use NSOperation to greatly simplify multi-threading tasks in your application. I am now going to provide a step-by-step walk-through sample application that uses NSOperation, NSOperationQueue, and QTKit.

Converting audio sample buffer format

https://libav-user.ffmpeg.narkive.com/nUZPysY6/converting-audio-sample-buffer-format

QTKit's QTSampleBuffer info: Linear PCM, 32 bit little-endian floating point, 2 channels, 44100 Hz Sample buffers being received from QTKit contain 512 samples, and have a buffer of 4096 in length. The libavcodec flv audio codec:

FFmpeg Devices Documentation

https://ffmpeg.org/ffmpeg-devices.html

Audio sample rate is always 48 kHz and the number of channels can be 2, 8 or 16. Note that all audio channels are bundled in one single audio track. 3.5.1 Options list_devices. If set to true, print a list of devices and exit. Defaults to false. This option is deprecated, please use the -sources option of ffmpeg to list the available input devices.