如何捕捉视频Android的框架? [英] How to capture a frame from video in android?
问题描述
您好,我已在一个自定义的视频打出android.with一些简单的播放,暂停,再玩一次和俘获button.NOw我所做的这一切,除了功能捕获。我已经seacrched很多很多的链接和GOOGLE了很多,但我找不到如何捕捉在运行Android视频帧?我的code是如下:请帮我要的是:
Main.java
包org.apache.android.media;
进口的java.io.File;
进口java.io.FileOutputStream中;
进口java.io.IOException异常;
进口的java.io.InputStream;
进口的java.net.URL;
进口java.net.URLConnection中;
进口android.app.Activity;
进口android.os.Bundle;
进口android.util.Log;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.webkit.URLUtil;
进口android.widget.EditText;
进口android.widget.ImageButton;
进口android.widget.Toast; 进口android.widget.VideoView;
公共类VideoViewDemo延伸活动{
私有静态最后弦乐TAG =VideoViewDemo;
私人VideoView mVideoView;
私人的EditText的mpath;
私人的ImageButton mPlay;
私人的ImageButton mPause;
私人的ImageButton MRESET;
私人的ImageButton MSTOP;
私人的ImageButton mcaptur;
私人字符串电流;
@覆盖
公共无效的onCreate(捆绑冰柱){
super.onCreate(冰柱);
的setContentView(R.layout.main);
mVideoView =(VideoView)findViewById(R.id.surface_view);
的mpath =(EditText上)findViewById(R.id.path);
mPath.setText(http://daily3gp.com/vids/747.3gp);
mPlay =(的ImageButton)findViewById(R.id.play);
mPause =(的ImageButton)findViewById(R.id.pause);
MRESET =(的ImageButton)findViewById(R.id.reset);
MSTOP =(的ImageButton)findViewById(R.id.stop);
mcaptur =(的ImageButton)findViewById(R.id.Captur);
mPlay.setOnClickListener(新OnClickListener(){
公共无效的onClick(查看视图){
的playVideo();
}
});
mPause.setOnClickListener(新OnClickListener(){
公共无效的onClick(查看视图){
如果(mVideoView!= NULL){
mVideoView.pause();
}
}
});
mReset.setOnClickListener(新OnClickListener(){
公共无效的onClick(查看视图){
如果(mVideoView!= NULL){
mVideoView.seekTo(0);
}
}
});
mStop.setOnClickListener(新OnClickListener(){
公共无效的onClick(查看视图){
如果(mVideoView!= NULL){
电流=无效;
mVideoView.stopPlayback();
}
}
});
runOnUiThread(新的Runnable(){
公共无效的run(){
的playVideo();
}
});
mcaptur.setOnClickListener(新OnClickListener(){
@覆盖
公共无效的onClick(视图v){
}
});
}
私人无效的playVideo(){
尝试{
。最终的字符串路径= mPath.getText()的toString();
Log.v(TAG,路径为:+路径);
如果(路径== NULL || path.length()== 0){
Toast.makeText(VideoViewDemo.this,文件URL /路径为空,
Toast.LENGTH_LONG).show();
}其他{
//如果路径没有改变,只是开始在媒体播放器
如果(path.equals(电流)及&放大器;!mVideoView =空){
mVideoView.start();
mVideoView.requestFocus();
返回;
}
电流=路径;
mVideoView.setVideoPath(了getDataSource(路径));
mVideoView.start();
mVideoView.requestFocus();
}
}赶上(例外五){
Log.e(TAG,错误:+ e.getMessage(),E);
如果(mVideoView!= NULL){
mVideoView.stopPlayback();
}
}
}
私人了getDataSource字符串(字符串路径)抛出IOException
如果(!URLUtil.isNetworkUrl(路径)){
返回路径;
}其他{
网址URL =新的URL(路径);
的URLConnection CN = url.openConnection();
cn.connect();
InputStream的流= cn.getInputStream();
如果(流== NULL)
抛出新的RuntimeException(流为空);
文件TEMP = File.createTempFile(mediaplayertmp,DAT);
temp.deleteOnExit();
串TEMPPATH = temp.getAbsolutePath();
FileOutputStream中出=新的FileOutputStream(TEMP);
中byte buf [] =新的字节[128];
做{
INT numread = stream.read(BUF);
如果(numread&下; = 0)
打破;
out.write(BUF,0,numread);
}而(真);
尝试{
stream.close();
}赶上(IOException异常前){
Log.e(TAG,错误:+ ex.getMessage(),除息);
}
返回TEMPPATH;
}
}
}
您可以用 MediaMetadataRetriever
视频帧。其基本用法如下:
MediaMetadataRetriever猎犬=新MediaMetadataRetriever();//设置数据源检索。
//从code,你可能想使用你的'字符串路径'在这里。
retriever.setDataSource(yourPath);//指定时间获取位图一帧。
//请注意,参数必须是在微秒,而不是毫秒。
位图位图= retriever.getFrameAtTime(timeInMicroSeconds);//使用您的位图的东西。
您可能需要使用 FFmpegMediaMetadataRetriever
为更好的性能。
Hi i have made a custom video played in android.with some simple "play","pause","play again" and "capture" button.NOw i have done all this functionalities except "capture".I have seacrched lot many links and googled a lot,But i can't find how to capture a frame from running video in android? my code is as below: please help me for is:
Main.java
package org.apache.android.media;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.URLUtil;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Toast;
import android.widget.VideoView;
public class VideoViewDemo extends Activity {
private static final String TAG = "VideoViewDemo";
private VideoView mVideoView;
private EditText mPath;
private ImageButton mPlay;
private ImageButton mPause;
private ImageButton mReset;
private ImageButton mStop;
private ImageButton mcaptur;
private String current;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
mVideoView = (VideoView) findViewById(R.id.surface_view);
mPath = (EditText) findViewById(R.id.path);
mPath.setText("http://daily3gp.com/vids/747.3gp");
mPlay = (ImageButton) findViewById(R.id.play);
mPause = (ImageButton) findViewById(R.id.pause);
mReset = (ImageButton) findViewById(R.id.reset);
mStop = (ImageButton) findViewById(R.id.stop);
mcaptur = (ImageButton) findViewById(R.id.Captur);
mPlay.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
playVideo();
}
});
mPause.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
if (mVideoView != null) {
mVideoView.pause();
}
}
});
mReset.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
if (mVideoView != null) {
mVideoView.seekTo(0);
}
}
});
mStop.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
if (mVideoView != null) {
current = null;
mVideoView.stopPlayback();
}
}
});
runOnUiThread(new Runnable() {
public void run() {
playVideo();
}
});
mcaptur.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
private void playVideo() {
try {
final String path = mPath.getText().toString();
Log.v(TAG, "path: " + path);
if (path == null || path.length() == 0) {
Toast.makeText(VideoViewDemo.this, "File URL/path is empty",
Toast.LENGTH_LONG).show();
} else {
// If the path has not changed, just start the media player
if (path.equals(current) && mVideoView != null) {
mVideoView.start();
mVideoView.requestFocus();
return;
}
current = path;
mVideoView.setVideoPath(getDataSource(path));
mVideoView.start();
mVideoView.requestFocus();
}
} catch (Exception e) {
Log.e(TAG, "error: " + e.getMessage(), e);
if (mVideoView != null) {
mVideoView.stopPlayback();
}
}
}
private String getDataSource(String path) throws IOException {
if (!URLUtil.isNetworkUrl(path)) {
return path;
} else {
URL url = new URL(path);
URLConnection cn = url.openConnection();
cn.connect();
InputStream stream = cn.getInputStream();
if (stream == null)
throw new RuntimeException("stream is null");
File temp = File.createTempFile("mediaplayertmp", "dat");
temp.deleteOnExit();
String tempPath = temp.getAbsolutePath();
FileOutputStream out = new FileOutputStream(temp);
byte buf[] = new byte[128];
do {
int numread = stream.read(buf);
if (numread <= 0)
break;
out.write(buf, 0, numread);
} while (true);
try {
stream.close();
} catch (IOException ex) {
Log.e(TAG, "error: " + ex.getMessage(), ex);
}
return tempPath;
}
}
}
You can get a video frame with MediaMetadataRetriever
. The basic usage is as follows.
MediaMetadataRetriever retriever = new MediaMetadataRetriever();
// Set data source to retriever.
// From your code, you might want to use your 'String path' here.
retriever.setDataSource(yourPath);
// Get a frame in Bitmap by specifying time.
// Be aware that the parameter must be in "microseconds", not milliseconds.
Bitmap bitmap = retriever.getFrameAtTime(timeInMicroSeconds);
// Do something with your bitmap.
You might want to use FFmpegMediaMetadataRetriever
for better performance.
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