标签：android-video-player android-videoview android
嗨,我制作了一个自定义视频,在android中播放.带有一些简单的“播放”,“暂停”,“再次播放”和“捕捉”按钮.现在,我已经完成了除“捕捉”之外的所有这些功能.我已经找到了很多链接和谷歌搜索很多,但是我找不到如何从运行Android的视频中捕获帧？我的代码如下：请帮助我的是：
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;
}
}
}
解决方法:
您可以使用MediaMetadataRetriever获得视频帧.基本用法如下.
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.
您可能要使用FFmpegMediaMetadataRetriever以获得更好的性能.
标签：android-video-player,android-videoview,android 来源： https://codeday.me/bug/20191122/2060881.html
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