iOS - 播放录制的音频失败,OSStatus错误-43(找不到文件)

Question

当我的视图加载时,我按以下方式设置AVAudioRecorder实例:

AVAudioSession *audioSession = [AVAudioSession sharedInstance];
audioSession.delegate = self;
[audioSession setActive:YES error:nil];
[audioSession setCategory:AVAudioSessionCategoryRecord error:nil];

NSString *tempDir = NSTemporaryDirectory();
NSString *soundFilePath = [tempDir stringByAppendingPathComponent:@"sound.m4a"];

NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
NSLog(@"%@", soundFileURL);

NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys:
                                [NSNumber numberWithInt:kAudioFormatMPEG4AAC], AVFormatIDKey,
                                [NSNumber numberWithInt:AVAudioQualityMin], AVEncoderAudioQualityKey,
                                [NSNumber numberWithInt:16], AVEncoderBitRateKey,
                                [NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
                                [NSNumber numberWithFloat:8000.0], AVSampleRateKey,
                                [NSNumber numberWithInt:8], AVLinearPCMBitDepthKey,
                                nil];

NSError *error = nil;

self.recorder = [[AVAudioRecorder alloc]
                 initWithURL:soundFileURL
                 settings:recordSettings
                 error:&error];
self.recorder.delegate = self;

if (error) {
    NSLog(@"error: %@", [error localizedDescription]);
} else {
    [self.recorder prepareToRecord];
}

然后,当用户按下记录按钮时,我做:

- (IBAction)record:(id)sender {
    if (!self.isRecording) {
        self.isRecording = YES;
        [self.recorder record];
        self.recordButton.enabled = NO;
    }
}

然后停止录制/播放:

- (IBAction)stop:(id)sender {
    if (self.isRecording) {
        [self.recorder stop];
        self.recordButton.enabled = YES;
        self.isRecording = NO;
    }

    if (self.isPlaying) {
        [self.player stop];
        self.isPlaying = NO;
        self.playButton.enabled = YES;
    }
}

之后,我希望能够播放录制的内容,因此我执行以下操作:

- (IBAction)play:(id)sender {
    NSError *error = nil;
    self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:self.recorder.url error:&error];
    self.player.delegate = self;

    if (error) {
        NSLog(@"%@", error.localizedDescription);
    } else {
        self.isPlaying = YES;
        [self.player play];
        self.playButton.enabled = NO;
    }
}

但是当我去播放文件时,找不到OSStatus错误-43文件.

这一切都在设备btw上运行,在模拟器上尝试实例化录音机或播放器时出错,从我看到它是模拟器问题.

编辑1:我解决了OSStatus错误-43部分它与编码格式有关,我注释掉格式并且它正确记录和播放文件,但我需要以压缩格式记录.有谁知道这个设置？

编辑2:我设法找到适用于压缩AAC音频的设置.一个2分钟的音频文件出现了256KB,我更新了我的代码以反映当前的状态.感谢所有为您提供帮助的人.

Answer 1

因为没有其他人回答(编辑:现在有)(我对iOS中的音频没有多少经验)但我会对此采取疯狂的尝试,但......

尝试改变

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:nil];

至

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];