玻璃摄像头preVIEW显示为乱码 [英] Glass camera preview display is garbled
问题描述
我试图让现场摄像机preVIEW在谷歌玻璃来显示。
I am trying to get a live camera preview to display in Google Glass.
我使用所有的摄像头默认值(和也尝试过使用几个不同的图像格式;理想情况下,我可以使用的YUV格式之一),但显示在显示屏上的图像是乱码,这样的
I'm using all of the camera defaults (and have also tried using a few different image formats; ideally, I can use one of the YUV formats), but the image that shows up in the display is garbled, like this:
的布局很简单:
<?xml version="1.0" encoding="utf-8"?>
<TextureView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/scan_preview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
下面是活动code:
public class ScanActivity extends Activity {
private static final String kTag = ScanActivity.class.getSimpleName();
private TextureView mVideoCaptureView = null;
private Camera mCamera = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scan);
setTitle(R.string.title_scan);
mVideoCaptureView = (TextureView) findViewById(R.id.scan_preview);
mVideoCaptureView.setKeepScreenOn(true);
mVideoCaptureView.setSurfaceTextureListener(new VideoCaptureTextureListener());
}
@Override
protected void onPause() {
super.onPause();
stopVideo();
}
@Override
protected void onResume() {
super.onResume();
startVideo();
}
private void startVideo() {
if (mCamera != null) {
mCamera.release();
}
mCamera = Camera.open();
if (null != mVideoCaptureView) {
try {
mCamera.setPreviewTexture(mVideoCaptureView.getSurfaceTexture());
} catch (IOException e) {
Log.e(kTag, "Error setting preview texture", e);
return;
}
}
mCamera.startPreview();
}
private void stopVideo() {
if (null == mCamera)
return;
try {
mCamera.stopPreview();
mCamera.setPreviewDisplay(null);
mCamera.setPreviewTexture(null);
mCamera.release();
} catch (IOException e) {
Log.w(kTag, e);
}
mCamera = null;
}
private final class VideoCaptureTextureListener implements TextureView.SurfaceTextureListener {
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
stopVideo();
return true;
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
startVideo();
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
}
}
你有什么想法,为什么这完全未经处理的相机preVIEW显示不正确?
Do you have any idea why this completely unmanipulated camera preview is not displaying correctly?
推荐答案
这已经在这里找到答案: http://stackoverflow.com /一/九十五万○四百二十七分之一千九百二十五万七千○七十八
This has been answered here: http://stackoverflow.com/a/19257078/950427
长期:
Camera.Parameters params = camera.getParameters();
params.setPreviewFpsRange(30000, 30000);
camera.setParameters(params);
Shorterm(测试):
有关的快速测试和使用的,只需添加到您的最外层的看法:
For quick testing and usage, simply add to your outermost view:
android:layout_margin="1dp"
例如:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_margin="1dp"
android:layout_height="match_parent" >
<org.opencv.android.JavaCameraView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/tutorial2_activity_surface_view" />
</LinearLayout>
这篇关于玻璃摄像头preVIEW显示为乱码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IT屋!