Question

好吧，所以在我的代码中我有一个非常基本的音乐设置：

import UIKit
import AVFoundation

class ViewController: UIViewController {

    @IBAction func extractAudioAndExport(_ sender: UIButton) {
        // Create a composition
        let composition = AVMutableComposition()            
        do {
            let sourceUrl = Bundle.main.url(forResource: "Movie", withExtension: "mov")!
            let asset = AVURLAsset(url: sourceUrl)
            guard let audioAssetTrack = asset.tracks(withMediaType: AVMediaTypeAudio).first else { return }
            let audioCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaTypeAudio, preferredTrackID: kCMPersistentTrackID_Invalid)
            try audioCompositionTrack.insertTimeRange(audioAssetTrack.timeRange, of: audioAssetTrack, at: kCMTimeZero)
        } catch {
            print(error)
        }

        // Get url for output
        let outputUrl = URL(fileURLWithPath: NSTemporaryDirectory() + "out.m4a")
        if FileManager.default.fileExists(atPath: exportUrl.path) {
            try? FileManager.default.removeItem(atPath: outputUrl.path)
        }

        // Create an export session
        let exportSession = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetPassthrough)!
        exportSession.outputFileType = AVFileTypeAppleM4A
        exportSession.outputURL = outputUrl

        // Export file
        exportSession.exportAsynchronously {
            guard case exportSession.status = AVAssetExportSessionStatus.completed else { return }

            DispatchQueue.main.async {
                // Present a UIActivityViewController to share audio file
                guard let outputURL = exportSession.outputURL else { return }
                let activityViewController = UIActivityViewController(activityItems: [outputURL], applicationActivities: [])
                self.present(activityViewController, animated: true, completion: nil)
            }
        }
    }

}

然后，停止我的音乐：

mainMusic = pygame.mixer.music.load('main_sound.mp3')
pygame.mixer.music.play(-1, 0.0)

但出于某种原因，当我将音乐静音时，它会在停止之前停顿，如果它完全停止的话。（在学校，在他们的电脑上，它有时会一直口吃，直到再次播放，然后口吃开始，或者有时，只是继续口吃）

无论如何都要阻止它，或音乐有什么问题？

停止时声音口吃

0 个答案: