安卓音频录制器断言失败：!(stepCount <= mUnreleased && mUnreleased <= mFrameCount)。

Question

我正在使用音频录制器，但是无法确定错误出现的位置！应用程序崩溃了...

 for (int rate : new int[]{8000, 11025, 16000, 22050, 44100}) {
        mBufferSize = AudioRecord.getMinBufferSize(rate, AudioFormat
                .CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
    }


 mAudioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
                RECORDER_SAMPLERATE,
                RECORDER_CHANNELS,
                RECORDER_AUDIO_ENCODING,
                mBufferSize);

我查阅了Stack，但没有找到相关的答案... 堆栈跟踪：

01-05 18:25:19.863 21646-23485/com.voicy.demo A/AudioTrackShared: Assertion failed: !(stepCount <= mUnreleased && mUnreleased <= mFrameCount)
01-05 18:25:19.863 21646-23485/com.voicy.demo A/libc: Fatal signal 6 (SIGABRT) at 0x0000548e (code=-6), thread 23485 (AudioRecorder T)
01-05 18:25:20.333 1061-1107/? E/InputDispatcher: channel '424b68b0 com.voicy.demo/com.voicy.demo.ui.HomePageActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
01-05 18:25:20.333 1061-1107/? E/InputDispatcher: channel '42d324d0 com.voicy.demo/com.voicy.demo.ui.HomePageActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
01-05 18:25:20.333 1061-1107/? E/InputDispatcher: channel '424b3a60 com.voicy.demo/com.voicy.demo.ui.ChatMessageActivity (server)' ~ Channel is unrecoverably broken and will be disposed!

- Raut Darpan

---

我也遇到了同样的问题。 - Alejandro Rangel

我仍然没有得到解决方案。 - Raut Darpan

Answer 1

1. 以下是代码：

   for (int rate : new int[]{8000, 11025, 16000, 22050, 44100}) {
       mBufferSize = AudioRecord.getMinBufferSize(rate, AudioFormat
       .CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
   }
   

   这里用不同的值计算 mBufferSize，最终以 44100 结束。虽然这是一个安全的数字。

   在这种情况下，应该是：

   mBufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE,
                                              RECORDER_CHANNELS,
                                              RECORDER_AUDIO_ENCODING);
   

2. 错误很可能是由于源缓冲区在中途被释放导致的。

通过this或that的StackOverflow答案获得灵感。

- SwiftArchitect