A simple exercise of Video Capture using MediaRecorder

It's a A simple exercise of Video Capture. Please note that it only show the simple steps to achieve video capture, without handle the various exception case. The app start with a video preview in a SurfaceView, and some initialization of MediaRecorder. When user click on the REC button, the video capture will be started, once user click on the STOP button, recording will be stopped, and the video will be save in "/sdcard/myvideo.mp4".



First of all, modify AndroidManifest.xml to set screen orientation of landscape, and theme of fullscreen, such that we have more space for our preview. And also grant permission of "android.permission.RECORD_AUDIO", "android.permission.CAMERA" and "android.permission.WRITE_EXTERNAL_STORAGE".

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.exercise.AndroidVideoCapture"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".AndroidVideoCapture"
                  android:label="@string/app_name"
                  android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
                  android:screenOrientation="landscape">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

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

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<LinearLayout
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<SurfaceView 
 android:id="@+id/videoview" 
 android:layout_width="720px"
 android:layout_height="480px"/>
<Button
 android:id="@+id/mybutton" 
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="REC"
 android:textSize="12dp"/>
</LinearLayout>
</LinearLayout>

package com.exercise.AndroidVideoCapture;

import java.io.IOException;

import android.app.Activity;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;

public class AndroidVideoCapture extends Activity implements SurfaceHolder.Callback{
 
 Button myButton;
 MediaRecorder mediaRecorder;
 SurfaceHolder surfaceHolder;
 boolean recording;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        recording = false;
        
        mediaRecorder = new MediaRecorder();
        initMediaRecorder();
        
        setContentView(R.layout.main);
        
        SurfaceView myVideoView = (SurfaceView)findViewById(R.id.videoview);
        surfaceHolder = myVideoView.getHolder();
        surfaceHolder.addCallback(this);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        
        myButton = (Button)findViewById(R.id.mybutton);
        myButton.setOnClickListener(myButtonOnClickListener);
    }
    
    private Button.OnClickListener myButtonOnClickListener 
    = new Button.OnClickListener(){

  @Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub
   if(recording){
    mediaRecorder.stop();
    mediaRecorder.release();
    finish();
   }else{
    mediaRecorder.start();
    recording = true;
    myButton.setText("STOP");
   }
  }};
    
 @Override
 public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
  // TODO Auto-generated method stub
  
 }
 @Override
 public void surfaceCreated(SurfaceHolder arg0) {
  // TODO Auto-generated method stub
  prepareMediaRecorder();
 }
 @Override
 public void surfaceDestroyed(SurfaceHolder arg0) {
  // TODO Auto-generated method stub

 }
 
 private void initMediaRecorder(){
  mediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
        CamcorderProfile camcorderProfile_HQ = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
        mediaRecorder.setProfile(camcorderProfile_HQ);
        mediaRecorder.setOutputFile("/sdcard/myvideo.mp4");
        mediaRecorder.setMaxDuration(60000); // Set max duration 60 sec.
        mediaRecorder.setMaxFileSize(5000000); // Set max file size 5M
 }
 
 private void prepareMediaRecorder(){
  mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());
  try {
   mediaRecorder.prepare();
  } catch (IllegalStateException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
}

Download the files.


Related Articles:
- Start Video Recording using android.provider.MediaStore.ACTION_VIDEO_CAPTURE
- CamcorderProfile: predefined camcorder profile settings for camcorder applications