iOS - 播放录制的音频失败，OSStatus错误-43（找不到文件） [英] iOS - Playback of recorded audio fails with OSStatus error -43 (file not found)

问题描述

我加载视图时，按以下方式设置AVAudioRecorder实例：

I set up an AVAudioRecorder instance the following way when my view loads:

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，我这样做：

Then, when the user presses the record button I do:

- (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，我想能够播放的是什么录音，所以我做了以下几点：

After, I want to be able to playback what was recorded, so I do the following:

- (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，获取 OSStatus错误-43 找不到文件。

But when I go and play the file is get OSStatus error -43 file not found.

这一切都在设备上运行btw，在模拟器上尝试实例化记录器时出错或玩家，从我看到它是一个模拟器问题。

This is all running on the device btw, on the simulator y an error when trying to instantiate the recorder or player, and from I've seen it's a simulator issue.

编辑1：我解决了OSStatus错误-43部分它有一些东西为了处理编码格式，我注释掉了格式并正确记录和播放了文件，但我需要以压缩格式录制。有没有人知道这个设置？

EDIT 1: I solved the OSStatus error -43 part it has something to do with the encoding format, I commented out the format and it recorded and played the file properly, but I need to record in a compressed format. Does anyone know the settings for this?

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。

EDIT 2: I managed to find settings that worked for compressed AAC audio. A 2min audio file comes out to 256KB, I updated my code to reflect the current state. Thanks to all of those who answered for your help.

推荐答案

因为没有人，所以我会采取疯狂的做法别人已经回答了（编辑：现在有）（我对iOS中的音频没有多少经验）但是......

I'm gonna take a wild stab at this since no-one else has answered ( now there is) (I don't have much experience with Audio in iOS) but...

尝试更改

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

到

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

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