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QTKit Architecture
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/QTKitApplicationProgrammingGuide/AnatomyoftheQTKFramework/AnatomyoftheQTKFramework.html
An object that represents the ordering and other characteristics of media data in a QTMovie object, such as a single video track or audio track. Provides methods for getting and setting track properties. QTMedia. An object that represents the data associated with a QTTrack object. Provides methods for getting and setting the media properties.
objective c - Changing the volume of a QTMovie playing …
https://stackoverflow.com/questions/2228104/changing-the-volume-of-a-qtmovie-playing-an-mp3
I'm using a QTMovie to play audio tracks. I've just started playing around with the volume controls and I'm changing the volume using setVolume:(float)newVolume. The problem I'm having is that the ...
Technical Note TN2300: Transitioning QTKit Code to AV ...
https://developer.apple.com/library/archive/technotes/tn2300/_index.html
To create an empty QTMovie that you can then add media to, you use the initToWritableDataReference: ... You can also set the relative volumes and ramping of audio tracks; and set the opacity, and opacity ramps, of video tracks. All file-based audiovisual assets are eligible to be combined, regardless of container type. ...
Using Multiple Audio Tracks in iMovie - Complete Guide
https://editingdojo.com/using-multiple-audio-tracks-in-imovie-complete-guide/
Select the audio track you want to add by clicking on it and pressing the “+” button; Scroll down the list of audio files in the list until you find the one you want. You can listen to each of them by simply pressing on them. Adding an audio …
Add a soundtrack and sound effects to your iMovie …
https://support.apple.com/en-us/HT210831
To add the soundtrack to your project, tap the Add Audio button next to a soundtrack. iMovie automatically places the song at the beginning of the project and automatically fits it to the length of the project. After you add a soundtrack, you can change its length like any other type of clip. You can also use more than one soundtrack in a project.
Quick Answer: How To Have Two Audio Tracks In Imovie ...
https://www.seniorcare2share.com/how-to-have-two-audio-tracks-in-imovie/
iMovie permits you to add multiple audio tracks in the editor. For example, you could have the video with audio, add a music track, add separate sound effects on top of that, etc. I’m not sure how many you can stack atop one another, but it’s more than 3.
HOW TO ADD MULTIPLE AUDIO TRACKS - iMovie… - Apple …
https://discussions.apple.com/thread/3011258
I'm having trouble adding multiple audio tracks in iMovie 11. I already have an audio track embedded with the video and a separate music track under. I wish to extend the music track further but need to cut it off at a certain point. I tried just adding the 2nd music track under the first but when I 'drop' the track it doesn't show up anywhere.
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