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描述:
* 利用MediaMetadataRetriever按照時間截取視頻
* 并轉換為Bitmap存放于SDCard
*
* 特別注意:
* getFrameAtTime()方法第一個參數的單位是微秒 (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);
// 取得視頻的長度(單位為毫秒)
String time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
// 取得視頻的長度(單位為秒)
int seconds = Integer.valueOf(time) / 1000;
// 得到每一秒時刻的bitmap比如第一秒,第二秒
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();
}
}
}
}

<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="獲取視頻的幀圖片"
android:layout_centerInParent="true"
/>
</RelativeLayout>