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Let beachAudioTrack = acks(withMediaType. Ios swift share video to youtube code#Your code might look like this: let beachMovie = AVURLAsset(url: (forResource: "beach", withExtension: "mov")!) //1 In order to add data to the tracks, you load an AVAsset, determine what range of time will go into the new composition, and then call the insert function. Use the insertTimeRange(_ timeRange: CMTimeRange, of track: AVAssetTrack, at startTime: CMTime) throws function on the audio and again on the video track to add data from the clip. Adding Video ClipsĪfter creation, the AVMutableComposition has a start time of CMTime.zero and a duration of CMTime.zero. The kCMPersistendTrackID_Invalid signals that you want a new, unique track id generated.ĪVFoundation can manipulate any of the ISO media formats. AVFoundation supports many different kinds of audio and video formats, but the. The code above creates a new, empty AVMutableComposition and then adds two tracks. audio, preferredTrackID: kCMPersistentTrackID_Invalid) Let audioTrack = movie.addMutableTrack(withMediaType. video, preferredTrackID: kCMPersistentTrackID_Invalid) Let videoTrack = movie.addMutableTrack(withMediaType. Ios swift share video to youtube movie#So, to set up an empty AVComposition for combining clips, use code such as this: let movie = AVMutableComposition() The composition will ensure that all of the data it holds displays at the right time and that the tracks stay in sync.Īt the simplest, a video clip is a single AVTrack of audio data and a single AVTrack of video data. You will work with an AVMutableComposition object in this tutorial.Įach track in our composition will have a start time and a duration. ![]() Changes made to any AVAsset by an AVComposition will not impact the original media file.Īs an extra layer, Apple keeps the editing features of an AVComposition separate from the playback features by creating an AVMutableComposition object. ![]() When we want to combine and manipulate AVAsset objects, an AVComposition helps us do that. Try to remember that the AVTrack is a wrapper around the actual pixel, sound-wave, or other data and that AVAsset is a collection of AVTrack objects. Unfortunately, because these items are so similar ( AVComposition is a subclass of AVAsset) it is easy to get confused. When working with AVComposition it is helpful to think about AVAsset and AVAssetTrack objects. Asset types can include audio and video subtitles, metadata, and text. This class in AVFoundation has the purpose of arranging different assets and types of assets into a single asset for playback or processing. Whenever you want to edit media or add effects, the first place to look is AVComposition. A demo project with code that supports this tutorial is available on Github. This tutorial was created and tested with Xcode 13 and Swift 5.Īs with most AVFoundation code, the Xcode simulator is not always the best platform for running the code. You will also gain an understanding of building on this basic pattern to make more advanced creations. Ios swift share video to youtube how to#In this tutorial, you will see how to combine a few short clips into a single video. Combining video clips or parts of video clips into a single video may appear complicated, but the things that add complexity also provide flexibility. ![]()
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