55 lines
1.9 KiB
Swift
55 lines
1.9 KiB
Swift
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// Copyright © 2021 Metabolist. All rights reserved.
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import AVFoundation
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enum AssetExportError: Error {
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case exportSetup
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case export
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}
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extension AVURLAsset {
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func exportWithoutAudioTrack(completion: @escaping ((Result<URL, AssetExportError>) -> Void)) {
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let composition = AVMutableComposition()
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let exportDirectory = FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString)
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guard let sourceVideoTrack = tracks(withMediaType: .video).first,
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let compositionVideoTrack = composition.addMutableTrack(
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withMediaType: .video,
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preferredTrackID: kCMPersistentTrackID_Invalid),
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case .success = Result(catching: {
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try compositionVideoTrack.insertTimeRange(
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CMTimeRange(start: .zero, duration: duration),
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of: sourceVideoTrack, at: .zero)
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}),
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let exportSession = AVAssetExportSession(
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asset: composition,
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presetName: AVAssetExportPresetHighestQuality),
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exportSession.supportedFileTypes.contains(.mp4),
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case .success = Result(catching: {
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try FileManager.default.createDirectory(
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at: exportDirectory,
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withIntermediateDirectories: false)
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})
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else {
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completion(.failure(.exportSetup))
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return
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}
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let exportURL = exportDirectory.appendingPathComponent(url.lastPathComponent)
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exportSession.outputFileType = AVFileType.mp4
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exportSession.outputURL = exportURL
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exportSession.timeRange = CMTimeRange(start: .zero, duration: duration)
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exportSession.exportAsynchronously {
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guard exportSession.status == .completed else {
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completion(.failure(.export))
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return
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}
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completion(.success(exportURL))
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}
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}
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}
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