154
技術社區[雲棲]
音視頻采集
原文：https://www.cnblogs.com/tjpfly/archive/2011/06/08/2074735.html
第一步：在功能清單文件AndroidManifest.xml中添加音頻刻錄和照相機權限：
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
第二步：編寫音頻刻錄代碼:
recorder.reset();
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //從照相機采集視頻
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setVideoSize(320, 240);
recorder.setVideoFrameRate(3); //每秒3幀
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263); //設置視頻編碼方式
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile("/mnt/sdcard/itcast.3gp");
recorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
recorder.prepare();//預期準備
recorder.start();//開始刻錄
...
recorder.stop();//停止刻錄
recorder.release(); //刻錄完成一定要釋放資源
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, VideoRecordActivity!</string>
<string name="app_name">視頻刻錄</string>
<string name="record">刻錄</string>
<string name="stop">停止</string>
<string name="success">刻錄完成</string>
<string name="error">刻錄失敗</string>
<string name="sdcarderror">SDCARD不存在或者寫保護</string>
</resources>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:andro
package="com.tjp.videorecord"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="7" />
<application android:icon="@drawable/icon" android:label="@string/app_name" >
<activity android:name=".VideoRecordActivity"
android:label="@string/app_name" android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<!-- 音頻權限 -->
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<!-- 視頻權限 -->
<uses-permission android:name="android.permission.CAMERA"/>
<!-- sdcard權限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
</manifest>
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:andro
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff"
>
<SurfaceView
android:layout_width="fill_parent"
android:layout_height="220dip"
android:
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="right"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:
android:text="@string/record"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dip"
android:
android:text="@string/stop"
/>
</LinearLayout>
</LinearLayout>
VideoRecordActivity
package com.tjp.videorecord;
import android.app.Activity;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class VideoRecordActivity extends Activity {
private SurfaceView surfaceView;
private MediaRecorder recorder;
private boolean record=false;
private static final String TAG="VideoRecordActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
surfaceView=(SurfaceView)findViewById(R.id.surfaceview);
Button stopButton=(Button)findViewById(R.id.stop);
Button recordButton=(Button)findViewById(R.id.record);
ButtonClickListiner buttonClickListiner=new ButtonClickListiner();
stopButton.setOnClickListener(buttonClickListiner);
recordButton.setOnClickListener(buttonClickListiner);
/*下麵設置Surface不維護自己的緩衝區，而是等待屏幕的渲染引擎將內容推送到用戶麵前*/
this.surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
this.surfaceView.getHolder().setFixedSize(320, 240);//設置分辨率
this.surfaceView.getHolder().setKeepScreenOn(true);
}
@Override
protected void onDestroy() {
recorder.release();
super.onDestroy();
}
private final class ButtonClickListiner implements OnClickListener{
@Override
public void onClick(View v) {
if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
Toast.makeText(VideoRecordActivity.this, R.string.sdcarderror, Toast.LENGTH_SHORT).show();
}
try {
switch (v.getId()) {
case R.id.stop:
if(record){
recorder.stop();
record=false;
}
break;
case R.id.record:
recorder.reset();
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //從照相機采集視頻
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setVideoSize(320, 240);
recorder.setVideoFrameRate(3); //每秒3幀
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263); //設置視頻編碼方式
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile("/mnt/sdcard/tjp.3gp");
recorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
recorder.prepare();//預期準備
recorder.start();//開始刻錄
record=true;
break;
default:
break;
}
} catch (Exception e) {
Log.i(TAG, e.getMessage());
Toast.makeText(VideoRecordActivity.this, R.string.error, Toast.LENGTH_SHORT).show();
}
}
}
}
最後更新：2017-04-02 06:52:02