android 录制 mp4
时间: 2023-12-27 22:01:15 浏览: 42
在Android手机上录制MP4视频非常简单。首先,打开您的手机上的相机应用程序。然后,选择视频录制模式。接下来,您可以调整一些设置,比如视频质量、分辨率和帧率等。然后,点击开始录制按钮开始录制您的视频。录制过程中,您可以随时点击暂停按钮来暂停录制,然后再次点击继续录制。一旦您完成了录制,点击停止按钮结束录制过程。您的视频将会保存为MP4格式,您可以在相册中找到它并进行播放或分享。另外,您也可以使用第三方应用程序来录制MP4视频,这些应用程序提供了更多的功能和定制选项,让您可以实现更多的创意和创作。总之,在Android手机上录制MP4视频非常简单,只需几个简单的步骤即可完成。希望这些信息对您有所帮助。
相关问题
Android 录制MP4添加时间水印
要在 Android 上录制 MP4 并添加时间水印,你可以使用 MediaRecorder 和 Canvas 对象。下面是一个简单的示例代码:
```java
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private MediaRecorder mediaRecorder;
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private boolean isRecording = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 初始化 SurfaceView 和 SurfaceHolder
surfaceView = findViewById(R.id.surface_view);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
// 初始化 MediaRecorder
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mediaRecorder.setVideoEncodingBitRate(10000000);
mediaRecorder.setVideoFrameRate(30);
mediaRecorder.setVideoSize(1280, 720);
mediaRecorder.setOutputFile(getOutputFile().getAbsolutePath());
mediaRecorder.setOrientationHint(90);
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
try {
mediaRecorder.prepare();
} catch (IOException e) {
Log.e(TAG, "prepare() failed: " + e.getMessage());
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
releaseMediaRecorder();
}
});
}
private File getOutputFile() {
File dir = new File(Environment.getExternalStorageDirectory(), "MyVideo");
if (!dir.exists()) {
dir.mkdirs();
}
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault());
String currentTimeStamp = dateFormat.format(new Date());
return new File(dir.getAbsolutePath() + File.separator + "VID_" + currentTimeStamp + ".mp4");
}
private void releaseMediaRecorder() {
if (mediaRecorder != null) {
try {
mediaRecorder.stop();
mediaRecorder.reset();
mediaRecorder.release();
mediaRecorder = null;
} catch (Exception e) {
Log.e(TAG, "releaseMediaRecorder() failed: " + e.getMessage());
}
}
}
private void startRecording() {
mediaRecorder.start();
isRecording = true;
// 开始绘制时间水印
new Thread(new Runnable() {
@Override
public void run() {
Canvas canvas = surfaceHolder.lockCanvas();
Paint paint = new Paint();
paint.setColor(Color.RED);
paint.setTextSize(60);
while (isRecording) {
canvas.drawText(getCurrentTime(), 100, 100, paint);
surfaceHolder.unlockCanvasAndPost(canvas);
SystemClock.sleep(1000);
}
}
}).start();
}
private void stopRecording() {
isRecording = false;
releaseMediaRecorder();
}
private String getCurrentTime() {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
return dateFormat.format(new Date());
}
public void onRecordBtnClick(View view) {
if (isRecording) {
stopRecording();
((Button) view).setText("Record");
} else {
startRecording();
((Button) view).setText("Stop");
}
}
}
```
上面的代码中,我们首先使用 MediaRecorder 和 SurfaceHolder 来初始化录制器和 SurfaceView。然后,我们在 surfaceCreated() 方法中初始化了 MediaRecorder 并将其准备好。在录制开始时,我们使用 Canvas 对象绘制时间水印,并将其加入到 SurfaceView 中。在录制结束时,我们释放了 MediaRecorder 并停止了绘制水印的线程。
需要注意的是,为了在 Android 上录制视频,你需要在 AndroidManifest.xml 文件中添加以下权限:
```xml
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
```
同时,你也需要在运行时请求这些权限。
Android 录制surface
您好!要在Android上录制Surface,您可以使用MediaRecorder类来实现。下面是一个简单的示例代码,展示了如何录制SurfaceView的内容:
```java
import android.Manifest;
import android.content.pm.PackageManager;
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 android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import java.io.File;
import java.io.IOException;
public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback {
private static final int REQUEST_PERMISSIONS = 100;
private static final String[] PERMISSIONS = {
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.RECORD_AUDIO,
Manifest.permission.CAMERA
};
private SurfaceView mSurfaceView;
private Button mRecordButton;
private MediaRecorder mMediaRecorder;
private boolean isRecording = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSurfaceView = findViewById(R.id.surface_view);
mRecordButton = findViewById(R.id.record_button);
mSurfaceView.getHolder().addCallback(this);
mRecordButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isRecording) {
stopRecording();
} else {
startRecording();
}
}
});
if (!hasPermissions()) {
ActivityCompat.requestPermissions(this, PERMISSIONS, REQUEST_PERMISSIONS);
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
prepareMediaRecorder();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
releaseMediaRecorder();
}
private boolean hasPermissions() {
for (String permission : PERMISSIONS) {
if (ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
return true;
}
private void prepareMediaRecorder() {
mMediaRecorder = new MediaRecorder();
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
String outputPath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "output.mp4";
mMediaRecorder.setOutputFile(outputPath);
CamcorderProfile profile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
mMediaRecorder.setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight);
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
mMediaRecorder.setPreviewDisplay(mSurfaceView.getHolder().getSurface());
try {
mMediaRecorder.prepare();
} catch (IOException e) {
Toast.makeText(this, "录制准备失败: " + e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
private void startRecording() {
mMediaRecorder.start();
isRecording = true;
mRecordButton.setText(R.string.stop_recording);
}
private void stopRecording() {
mMediaRecorder.stop();
isRecording = false;
mRecordButton.setText(R.string.start_recording);
releaseMediaRecorder();
}
private void releaseMediaRecorder() {
if (mMediaRecorder != null) {
mMediaRecorder.reset();
mMediaRecorder.release();
mMediaRecorder = null;
}
}
}
```
请确保在AndroidManifest.xml文件中添加必要的权限,并在布局文件中添加一个SurfaceView和一个Button,用于启动/停止录制。
这是一个简单的示例,您可以根据您的需求进行扩展和优化。希望对您有所帮助!如果您有任何问题,请随时提问。
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