It's a old exercise to retrieve image frame from mp4 video. At the time I wrote the post, it work as expected without need permission of "android.permission.READ_EXTERNAL_STORAGE". But now, you have to add it in AndroidManifest.xml. Otherwise, the code mediaMetadataRetriever.setDataSource(uri) will throw java.lang.IllegalArgumentException, caused by the path is invalid.
MainActivity.java
package com.example.androidmediametadataretriever;
import android.support.v7.app.ActionBarActivity;
import android.graphics.Bitmap;
import android.media.MediaMetadataRetriever;
import android.os.Bundle;
import android.widget.ImageView;
public class MainActivity extends ActionBarActivity {
String uri = "/storage/emulated/0/DCIM/LEDrose.mp4";
ImageView capturedImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
capturedImageView = (ImageView) findViewById(R.id.capturedimage);
MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
mediaMetadataRetriever.setDataSource(uri);
Bitmap bmFrame = mediaMetadataRetriever.getFrameAtTime(5000000);
capturedImageView.setImageBitmap(bmFrame);
}
}
activity_main.xml
<LinearLayout 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"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.androidmediametadataretriever.MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold" />
<ImageView
android:id="@+id/capturedimage"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
Permission of "android.permission.READ_EXTERNAL_STORAGE" is needed in AndroidManifest.xml. And minSdkVersion have to be 10 or higher to use MediaMetadataRetriever in your code.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidmediametadataretriever"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
