在Android上录制视频而不在屏幕上显示视频
我一直试图录制视频,但没有成功。我的代码可以编译,但在尝试运行时崩溃。有人知道我如何在不改变屏幕视图的情况下进行录制吗?谢谢在Android上录制视频而不在屏幕上显示视频,android,video-capture,Android,Video Capture,我一直试图录制视频,但没有成功。我的代码可以编译,但在尝试运行时崩溃。有人知道我如何在不改变屏幕视图的情况下进行录制吗?谢谢 recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT); recorder.setOutputForma
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
recorder.setMaxDuration(15000); // 15 seconds
recorder.setMaxFileSize(5000000); // Approximately 5 megabytes
recorder.setOutputFile("/sdcard/xxxxx.mp4");
recorder.start();
您需要指定一个有效的表面:
recorder.setPreviewDisplay()。
,然后您可以调用recorder.prepare()
,然后才调用recorder.start()
对有效曲面的需求非常烦人,这里有一个关于删除它的线程:
例如,这将允许后台应用程序录制视频。当屏幕关闭时,在Android手机上捕获视频记录的源代码和步骤。参考文章 下面是一些示例记录代码:
public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback {
MediaRecorder recorder;
SurfaceHolder holder;
boolean recording = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
recorder = new MediaRecorder();
initRecorder();
setContentView(R.layout.main);
SurfaceView cameraView = (SurfaceView) findViewById(R.id.CameraView);
holder = cameraView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
cameraView.setClickable(true);
cameraView.setOnClickListener(this);
}
private void initRecorder() {
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
CamcorderProfile cpHigh = CamcorderProfile
.get(CamcorderProfile.QUALITY_HIGH);
recorder.setProfile(cpHigh);
recorder.setOutputFile("/sdcard/videocapture_example.mp4");
recorder.setMaxDuration(50000); // 50 seconds
recorder.setMaxFileSize(5000000); // Approximately 5 megabytes
}
private void prepareRecorder() {
recorder.setPreviewDisplay(holder.getSurface());
try {
recorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
finish();
} catch (IOException e) {
e.printStackTrace();
finish();
}
}
public void onClick(View v) {
if (recording) {
recorder.stop();
recording = false;
// Let's initRecorder so we can record again
initRecorder();
prepareRecorder();
} else {
recording = true;
recorder.start();
}
}
public void surfaceCreated(SurfaceHolder holder) {
prepareRecorder();
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
public void surfaceDestroyed(SurfaceHolder holder) {
if (recording) {
recorder.stop();
recording = false;
}
recorder.release();
finish();
}
}
Also, do not forget to include these permissions in manifest:
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
公共类VideoCapture扩展活动实现OnClickListener、SurfaceHolder.Callback{
媒体记录器;
表面焊钳;
布尔记录=假;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
requestWindowFeature(窗口。功能\u无\u标题);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_全屏,
WindowManager.LayoutParams.FLAG(全屏);
setRequestedOrientation(ActivityInfo.SCREEN\u ORIENTATION\u横向);
记录器=新的MediaRecorder();
initRecorder();
setContentView(R.layout.main);
SurfaceView cameraView=(SurfaceView)findViewById(R.id.cameraView);
holder=cameraView.getHolder();
holder.addCallback(本);
夹持器。设置类型(表面夹持器。表面夹持器类型推压缓冲);
cameraView.setClickable(真);
cameraView.setOnClickListener(这个);
}
私有void initRecorder(){
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
摄像机档案cpHigh=摄像机档案
.获得(摄像机产品质量高);
记录器。设置配置文件(cpHigh);
setOutputFile(“/sdcard/videocapture_example.mp4”);
recorder.setMaxDuration(50000);//50秒
recorder.setMaxFileSize(5000000);//大约5兆字节
}
私有无效制备记录程序(){
setPreviewDisplay(holder.getSurface());
试一试{
记录器。准备();
}捕获(非法状态){
e、 printStackTrace();
完成();
}捕获(IOE异常){
e、 printStackTrace();
完成();
}
}
公共void onClick(视图v){
如果(录音){
录音机。停止();
记录=假;
//让我们打开录音机,这样我们可以再录音
initRecorder();
prepareRecorder();
}否则{
记录=真;
recorder.start();
}
}
已创建的公共空白表面(表面持有人){
prepareRecorder();
}
公共无效表面更改(表面文件夹持有者,整型格式,整型宽度,
整数高度){
}
公共空间表面覆盖(表面覆盖物持有人){
如果(录音){
录音机。停止();
记录=假;
}
记录器。释放();
完成();
}
}
另外,不要忘记在清单中包含这些权限:
如果提供异常消息和堆栈跟踪,可能会有所帮助。