本文介绍了Android:视频录制输出方向已翻转的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我开发了一个可以录制视频的应用程序.录制开始时，视频以旋转方向录制.录制时的视频视图向左翻转.我不知道为什么会这样.有人可以帮我解决这个问题.我的编码如下:
I have developed an app that can record video. When the recording starts the video is recorded in a rotated orientation. The video view while recording is flipped to the left. I cant figure out why its like that. Can someone help me with this issue. My codings are as follows:
MainActivity.java:
MainActivity.java:
import android.app.Activity;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
public class MainActivity extends Activity implements SurfaceHolder.Callback{
Button myButton;
MediaRecorder mediaRecorder;
SurfaceHolder surfaceHolder;
boolean recording;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
recording = false;
mediaRecorder = new MediaRecorder();
initMediaRecorder();
setContentView(R.layout.activity_main);
SurfaceView myVideoView = (SurfaceView)findViewById(R.id.videoview);
surfaceHolder = myVideoView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
myButton = (Button)findViewById(R.id.mybutton);
myButton.setOnClickListener(myButtonOnClickListener);
}
private Button.OnClickListener myButtonOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(recording){
mediaRecorder.stop();
mediaRecorder.release();
finish();
}else{
mediaRecorder.start();
recording = true;
myButton.setText("STOP");
}
}};
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
// TODO Auto-generated method stub
prepareMediaRecorder();
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
// TODO Auto-generated method stub
}
private void initMediaRecorder(){
java.util.Date date= new java.util.Date();
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(date.getTime());
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/MyFolder/";
File dir = new File(path);
if(!dir.exists())
dir.mkdirs();
String myfile = new String(path + File.separator +
"VID_"+ timeStamp + ".mp4");
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setOrientationHint(0);
CamcorderProfile camcorderProfile_HQ = CamcorderProfile.get(CamcorderProfile.QUALITY_720P);
mediaRecorder.setProfile(camcorderProfile_HQ);
mediaRecorder.setOutputFile(myfile);
mediaRecorder.setMaxDuration(60000); // Set max duration 60 sec.
mediaRecorder.setMaxFileSize(5000000); // Set max file size 5M
}
private void prepareMediaRecorder(){
mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());
try {
mediaRecorder.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
activity_main.xml:
activity_main.xml:
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SurfaceView android:id="@+id/videoview"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</SurfaceView>
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
<Button
android:text="Rec"
android:id="@+id/mybutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom">
</Button>
</FrameLayout>
logcat中没有错误.任何建议/帮助将不胜感激.谢谢.
There is no error in logcat. Any suggestions/help would be much appreciated. Thank you.
推荐答案
输出取决于setOrientationHint(..)
使用下面的方法设置directionHint
set orientationHint using below
mediaRecorder.setOrientationHint(mOrientation);
if (Build.MODEL.equalsIgnoreCase("Nexus 6") && flag == 1) {
if (mOrientation == 90) {
mediaRecorder.setOrientationHint(mOrientation);
} else if (mOrientation == 180) {
mediaRecorder.setOrientationHint(0);
} else {
mediaRecorder.setOrientationHint(180);
}
} else if (mOrientation == 90 && flag == 1) {
mediaRecorder.setOrientationHint(270);
} else if (flag == 1) {
mediaRecorder.setOrientationHint(mOrientation);
}
mOrientation you can get from `OrientationEventListener`
您需要enable()方向侦听器并禁用onDestroy()
You need to enable() orientation listener and disable onDestroy()
第1步:声明veriable和Object:
Step 1: Declare veriable and Object:
OrientationEventListener myOrientationEventListener;
int iOrientation = 0;
int mOrientation = 90;
第2步:添加此方法onCreate()
private void identifyOrientationEvents() {
myOrientationEventListener = new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL) {
@Override
public void onOrientationChanged(int iAngle) {
final int iLookup[] = {0, 0, 0, 90, 90, 90, 90, 90, 90, 180, 180, 180, 180, 180, 180, 270, 270, 270, 270, 270, 270, 0, 0, 0}; // 15-degree increments
if (iAngle != ORIENTATION_UNKNOWN) {
int iNewOrientation = iLookup[iAngle / 15];
if (iOrientation != iNewOrientation) {
iOrientation = iNewOrientation;
if (iOrientation == 0) {
mOrientation = 90;
} else if (iOrientation == 270) {
mOrientation = 0;
} else if (iOrientation == 90) {
mOrientation = 180;
}
}
mPhotoAngle = normalize(iAngle);
}
}
};
if (myOrientationEventListener.canDetectOrientation()) {
myOrientationEventListener.enable();
}
}
也是onResume()
@Override
protected void onResume() {
super.onResume();
try {
if (myOrientationEventListener != null)
myOrientationEventListener.enable();
} catch (Exception e1) {
e1.printStackTrace();
}
}
第3步:使用准备好MediaRecorder后禁用
Step 3: Disable after preparing MediaRecorder using
myOrientationEventListener.disable();
这篇关于Android:视频录制输出方向已翻转的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！