Android intercepts video frames and converts them to the Bitmap example

MainActivity is as follows:

 
package cn.testmediametadataretriever; 
import java.io.File; 
import java.io.FileOutputStream; 
import android.media.MediaMetadataRetriever; 
import android.os.Bundle; 
import android.os.Environment; 
import android.app.Activity; 
import android.graphics.Bitmap; 
import android.graphics.Bitmap.CompressFormat; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
/** 
* Demo describe : 
*  using MediaMetadataRetriever Capture the video by time  
*  And converted into Bitmap Stored in SDCard 
* 
*  Pay special attention to : 
* getFrameAtTime() Methods the first 1 Is in microseconds  (us) 
* 
*/ 
public class MainActivity extends Activity { 
private Button mButton; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 
init(); 
} 
private void init(){ 
mButton=(Button) findViewById(R.id.button); 
mButton.setOnClickListener(new ClickListenerImpl()); 
} 
private class ClickListenerImpl implements OnClickListener{ 
@Override 
public void onClick(View v) { 
switch (v.getId()) { 
case R.id.button: 

getBitmapsFromVideo(); 

default: 
break; 
} 

} 

} 

public void getBitmapsFromVideo() { 
String dataPath = Environment.getExternalStorageDirectory()+ "/testVideo.mp4"; 
MediaMetadataRetriever retriever = new MediaMetadataRetriever(); 
retriever.setDataSource(dataPath); 
//  Get the length of the video ( In milliseconds ) 
String time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION); 
//  Get the length of the video ( The unit is in seconds ) 
int seconds = Integer.valueOf(time) / 1000; 
//  For each 1 The second time bitmap Such as the first 1 seconds , The first 2 seconds  
for (int i = 1; i <= seconds; i++) { 
Bitmap bitmap = retriever.getFrameAtTime(i*1000*1000,MediaMetadataRetriever.OPTION_CLOSEST_SYNC); 
String path = Environment.getExternalStorageDirectory()+ File.separator + i + ".jpg"; 
FileOutputStream fos = null; 
try { 
fos = new FileOutputStream(path); 
bitmap.compress(CompressFormat.JPEG, 80, fos); 
fos.close(); 
} catch (Exception e) { 
e.printStackTrace(); 
} 
} 
} 
} 

main. xml as follows:

 
<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
> 
<Button 
android:id="@+id/button" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:text=" Gets the frame image of the video " 
android:layout_centerInParent="true" 
/> 
</RelativeLayout>