MediaRecorder IOException:准备失败 [英] MediaRecorder IOException: prepare failed

问题描述

我想使用MediaRecorder录制语音，我的代码是:

I want to use MediaRecorder to record voice, my code is:

 public void record(View v) {
       Log.d(TAG, "record");

    this.mediaRecorder.setAudioChannels(1);
    this.mediaRecorder.setAudioSamplingRate(44100);
    this.mediaRecorder.setAudioEncodingBitRate(64000);
    this.mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    this.mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    this.mediaRecorder.setOutputFile(this.file.getAbsolutePath());
    this.mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
    try {
        this.mediaRecorder.prepare();
        this.mediaRecorder.start();

        // update the buttons
        this.setButtonsEnabled(false, true, false);
    } catch (IOException e) {
        Log.e(TAG, "Failed to record()", e);
    }
}

或

   public void record(View v) {
    Log.d(TAG, "record");
    this.mediaRecorder = new MediaRecorder();
    this.mediaRecorder.setAudioChannels(1);
    this.mediaRecorder.setAudioSamplingRate(8000);

    this.mediaRecorder.setAudioEncodingBitRate(16);
    this.mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    this.mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
    this.mediaRecorder.setOutputFile(this.file.getAbsolutePath());

    this.mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

    try {
        this.mediaRecorder.prepare();
        this.mediaRecorder.start();

        // update the buttons
        this.setButtonsEnabled(false, true, false);
    } catch (IOException e) {
        Log.e(TAG, "Failed to record()", e);
    }
}

在三星上一切正常，但在戴尔上，两种方法均不成功

On a Samsung all is OK, but on a Dell two methods do not succeed

这是logcat:

 02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397): Failed to record()
 02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397): java.io.IOException: prepare failed.
 02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397):     at android.media.MediaRecorder._prepare(Native Method)
 02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397):     at android.media.MediaRecorder.prepare(MediaRecorder.java:524)
 02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397):     at com.marakana.android.audiorecorderdemo.AudioRecorderDemoActivity.record(AudioRecorderDemoActivity.java:69)
 02-01 14:05:20.074: E/AndroidRuntime(1790): FATAL EXCEPTION: main
 02-01 14:05:20.074: E/AndroidRuntime(1790): java.lang.IllegalStateException: Could not execute method of the activity

推荐答案

首先，您的代码看起来还不错.您是否已将必需的权限添加到清单文件?

First at all you code looks fine. Have you added the required permissions to your manifest file?

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />

如果是，请尝试更换:

this.mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

作者

this.mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

别忘了检查视频文件的路径是否正确.

Don't forget to check if the path of your video file is correct.

这篇关于MediaRecorder IOException:准备失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！