Question

github.com/expo/audio-recording-example

您可以查看有关代码的信息。

我正在使用来自expo-av的音频。

即使在模拟器上，它也可以在android设备上正常工作。在android设备上，它首先请求音频许可，然后单击“停止”就开始记录音频，它提供了播放音频。

但是在iOS上进行测试时，它也不需要征求许可，而是直接显示录音页面，然后单击“录音”按钮，录音就不会开始。

我不明白它是否与iOS音频许可有关或与audio.recording的语法有关。

我尝试将权限手动设置为true

    this.recordingSettings = JSON.parse(JSON.stringify(Audio.RECORDING_OPTIONS_PRESET_LOW_QUALITY));
    // // UNCOMMENT THIS TO TEST maxFileSize:
    // this.recordingSettings.android['maxFileSize'] = 12000;
  }

  _askForPermissions = async () => {
    const response = await Permissions.askAsync(Permissions.AUDIO_RECORDING);
    this.setState({
      haveRecordingPermissions: response.status === 'granted',
    });
  };

  async _stopPlaybackAndBeginRecording() {
    this.setState({
      isLoading: true,
    });
    if (this.sound !== null) {
      await this.sound.unloadAsync();
      this.sound.setOnPlaybackStatusUpdate(null);
      this.sound = null;
    }
    await Audio.setAudioModeAsync({
      allowsRecordingIOS: true,
      interruptionModeIOS: Audio.INTERRUPTION_MODE_IOS_DO_NOT_MIX,
      playsInSilentModeIOS: true,
      shouldDuckAndroid: true,
      interruptionModeAndroid: Audio.INTERRUPTION_MODE_ANDROID_DO_NOT_MIX,
      playThroughEarpieceAndroid: false,
      staysActiveInBackground: true,
    });
    if (this.recording !== null) {
      this.recording.setOnRecordingStatusUpdate(null);
      this.recording = null;
    }

    const recording = new Audio.Recording();
    await recording.prepareToRecordAsync(this.recordingSettings);
    recording.setOnRecordingStatusUpdate(this._updateScreenForRecordingStatus);

    this.recording = recording;
    await this.recording.startAsync(); // Will call this._updateScreenForRecordingStatus to update the screen.
    this.setState({
      isLoading: false,
    });
  }

  _onRecordPressed = () => {
    if (this.state.isRecording) {
      this._stopRecordingAndEnablePlayback();
    } else {
      this._stopPlaybackAndBeginRecording();
    }
  };

我希望能在iOS上进行录音，但会卡在isrecording上。

Answer 1

我更改了录音设置，并且在android和iOS设备上一切正常。我更新的设置。


    this.recordingSettings = JSON.parse(JSON.stringify(Audio.RECORDING_OPTIONS_PRESET_HIGH_QUALITY: RecordingOptions = {
      android: {
        extension: '.m4a',
        outputFormat: Audio.RECORDING_OPTION_ANDROID_OUTPUT_FORMAT_MPEG_4,
        audioEncoder: Audio.RECORDING_OPTION_ANDROID_AUDIO_ENCODER_AAC,
        sampleRate: 44100,
        numberOfChannels: 2,
        bitRate: 128000,
    },
    ios: {
        extension: '.m4a',
        outputFormat: Audio.RECORDING_OPTION_IOS_OUTPUT_FORMAT_MPEG4AAC,
        audioQuality: Audio.RECORDING_OPTION_IOS_AUDIO_QUALITY_MIN,
        sampleRate: 44100,
        numberOfChannels: 2,
        bitRate: 128000,
        linearPCMBitDepth: 16,
        linearPCMIsBigEndian: false,
        linearPCMIsFloat: false,
    },
    }));

这根据我的要求使用了此设置，您也可以使用其他设置选项。但是只要保持Audio.RECORDING_OPTIONS_PRESET_HIGH_QUALITY不变即可。

Expo-Audio在iOS上不起作用。它卡在录制按钮本身上

1 个答案: