android Camera2 Hit超时进行jpeg回调
作者：互联网
我正在使用新的相机API(camera2)在android 5.0.2上创建一个应用程序.该应用程序每2.5秒拍摄一张照片,持续3个小时(总共4320张照片).正如您在下面的代码中看到的那样,我使用“ timer”对重复的内容进行编码,而没有针对Capture picture without preview using camera2 API的预览.我正在使用NEXUS7 2013 16G 5.0.2进行测试.它对于开头的200-300张图片正常工作,并失败,并显示以下错误消息.失败总是以“ E / RequestThread-1：jpeg回调的命中超时！”开始,它必须触发某些事件.有人会帮助摆脱这种触发吗？否则,如果是Android Bug,这将在5.1.0中修复？
03-30 15:46:04.472 11432-11432/com.example.android.camera2basic V/yo click﹕ ---- 174 ---- click
03-30 15:46:05.026 11432-11537/com.example.android.camera2basic E/RequestThread-1﹕ Hit timeout for jpeg callback!
03-30 15:46:05.027 11432-11537/com.example.android.camera2basic W/CaptureCollector﹕ Jpeg buffers dropped for request: 173
03-30 15:46:05.076 11432-11480/com.example.android.camera2basic E/CameraDevice-JV-1﹕ Lost output buffer reported for frame 173
03-30 15:46:05.090 11432-11537/com.example.android.camera2basic W/LegacyRequestMapper﹕ convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
03-30 15:46:05.090 11432-11537/com.example.android.camera2basic W/LegacyRequestMapper﹕ Only received metering rectangles with weight 0.
03-30 15:46:05.091 11432-11537/com.example.android.camera2basic W/LegacyMetadataMapper﹕ convertAfModeToLegacy - ignoring unsupported mode 4, defaulting to fixed
03-30 15:46:05.091 11432-11537/com.example.android.camera2basic W/LegacyRequestMapper﹕ convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
03-30 15:46:05.098 11432-11537/com.example.android.camera2basic E/AndroidRuntime﹕ FATAL EXCEPTION: RequestThread-1
Process: com.example.android.camera2basic, PID: 11432
java.lang.RuntimeException: startPreview failed
at android.hardware.Camera.startPreview(Native Method)
at android.hardware.camera2.legacy.RequestThreadManager.startPreview(RequestThreadManager.java:275)
at android.hardware.camera2.legacy.RequestThreadManager.doJpegCapturePrepare(RequestThreadManager.java:288)
at android.hardware.camera2.legacy.RequestThreadManager.access$1700(RequestThreadManager.java:61)
at android.hardware.camera2.legacy.RequestThreadManager$5.handleMessage(RequestThreadManager.java:767)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:135)
at android.os.HandlerThread.run(HandlerThread.java:61)
这是我的代码：
public class CameraActivity extends Activity {
Timer mTimer = null;
Handler mHandler = new Handler();
private ImageReader imageReader;
private Handler backgroundHandler;
private HandlerThread backgroundThread;
private String cameraId;
private CameraDevice cameraDevice;
private CameraCaptureSession cameraCaptureSession;
static int count = 0;
static int count2 = 0;
/**
* Conversion from screen rotation to JPEG orientation.
*/
private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
static {
ORIENTATIONS.append(Surface.ROTATION_0, 90);
ORIENTATIONS.append(Surface.ROTATION_90, 0);
ORIENTATIONS.append(Surface.ROTATION_180, 270);
ORIENTATIONS.append(Surface.ROTATION_270, 180);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_camera);
setContentView(R.layout.activity_main);
Button takePicture = (Button)findViewById(R.id.takepic);
takePicture.setOnClickListener(onClickPicture);
//(1) setting up camera but stop before camera createCaptureRequest
setupCamera2();
}
private void setupCamera2() {
CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
for (String cameraId : manager.getCameraIdList()) {
CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);
//if (characteristics.get(CameraCharacteristics.LENS_FACING) != CameraCharacteristics.LENS_FACING_BACK) {
if (characteristics.get(CameraCharacteristics.LENS_FACING) != CameraCharacteristics.LENS_FACING_FRONT) {
continue;
}
StreamConfigurationMap configs = characteristics.get(
CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
this.cameraId = cameraId;
manager.openCamera(this.cameraId, cameraStateCallback, backgroundHandler);
Size[] sizes = configs.getOutputSizes(ImageFormat.JPEG);
int picWidth = 640;//1920;
int picHeight = 480;//1080;
imageReader = ImageReader.newInstance(picWidth, picHeight, ImageFormat.JPEG, 2);
imageReader.setOnImageAvailableListener(onImageAvailableListener, backgroundHandler);
}
} catch (CameraAccessException | NullPointerException e) {
e.printStackTrace();
}
}
private final CameraDevice.StateCallback cameraStateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice device) {
cameraDevice = device;
//(2) Camera capture session
createCameraCaptureSession();
}
@Override
public void onDisconnected(CameraDevice cameraDevice) {}
@Override
public void one rror(CameraDevice cameraDevice, int error) {}
};
//private void createCaptureSession() {
private void createCameraCaptureSession() {
List<Surface> outputSurfaces = new LinkedList<>();
outputSurfaces.add(imageReader.getSurface());
Log.v("-yo(2)-", "in createcameraCaptureSession now");
try {
cameraDevice.createCaptureSession(outputSurfaces, new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(CameraCaptureSession session) {
//cameraCaptureSession = session;
cameraCaptureSession = session;
//commented out to invoked from button
//createCaptureRequest();
}
@Override
public void onConfigureFailed(CameraCaptureSession session) {}
}, null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private final ImageReader.OnImageAvailableListener onImageAvailableListener = new ImageReader.OnImageAvailableListener() {
@Override
public void onImageAvailable(ImageReader reader) {
//createCaptureRequest();
Log.v("yo ireader ","---- "+(count2++)+" ---- ireader");
//Image mImage = imageReader.acquireLatestImage();
Image mImage = reader.acquireLatestImage();
File mFile = new File(Environment.getExternalStorageDirectory() + "/yP2PTEST/0P2Pimage.jpg");
Log.v("--yo--", "In ImageReader now writing to "+mFile);
/////////////////////////////////////
ByteBuffer buffer = mImage.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
FileOutputStream output = null;
try {
output = new FileOutputStream(mFile);
output.write(bytes);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
mImage.close();
if (null != output) {
try {
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
ImageView curPic = (ImageView)findViewById(R.id.imageView1);
Bitmap mCurrentBitmap = BitmapFactory.decodeFile(mFile.getPath());
curPic.setImageBitmap(mCurrentBitmap);
}
///////////////////////////////////
};
private void createCaptureRequest() {
Log.v("-yo(3)-", "in createCaptureRequest now");
try {
CaptureRequest.Builder requestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
requestBuilder.addTarget(imageReader.getSurface());
// Focus
requestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
// Orientation
//yo int rotation = windowManager.getDefaultDisplay().getRotation();
int rotation = this.getWindowManager().getDefaultDisplay().getRotation();
requestBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));
// cameraCaptureSession.capture(requestBuilder.build(), camera2Callback, null);
cameraCaptureSession.capture(requestBuilder.build(), mCaptureCallback, null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
CameraCaptureSession.CaptureCallback mCaptureCallback
= new CameraCaptureSession.CaptureCallback() {
@Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request,
TotalCaptureResult result) {
//showToast("JPEG Saved : ");
//Log.v("yo save","- saved JPEG -");
//unlockFocus();
}
};
private Handler mMessageHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (this != null) {
Toast.makeText(CameraActivity.this, (String) msg.obj, Toast.LENGTH_SHORT).show();
}
}
};
private void showToast(String text) {
// We show a Toast by sending request message to mMessageHandler. This makes sure that the
// Toast is shown on the UI thread.
Message message = Message.obtain();
message.obj = text;
mMessageHandler.sendMessage(message);
}
//------------------------------------------------------------//
public View.OnClickListener onClickPicture = new View.OnClickListener() {
public void onClick(View v) {
/*------- camera2 --------------*/
mTimer = null;
mTimer = new Timer(true);
mTimer.schedule( new TimerTask(){
@Override
public void run() {
/*------------------------*/
mHandler.post( new Runnable() {
public void run() {
createCaptureRequest();
Log.v("yo click ","---- "+(count++)+" ---- click");
}
});
}
}, 1000, 2500);//1500,1600, 1800 etc
};
};
};
提前致谢.
编辑
我调查了CAMERA2 API的源程序,并发现了错误消息的出处.
JPEG_FRAME_TIMEOUT当前为300ms,我猜它太小了,想要增加它.如果有人知道该怎么做,请告诉我？
if (holder.hasJpegTargets()) {
doJpegCapture(holder);
if (!mReceivedJpeg.block(JPEG_FRAME_TIMEOUT)) {
Log.e(TAG, "Hit timeout for jpeg callback!");
mCaptureCollector.failNextJpeg();
}
}
解决方法:
修改过的Google示例遇到了相同的问题.
拍完两张照片后,出现了此错误,因此您只需要根据需要扩展最后一个参数,它就可以工作.
imageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(),ImageFormat.JPEG, 2);
但是请记住以下几点：
@param maxImages用户想要同时访问的最大图像数.该值应尽可能小以限制内存使用.用户获得maxImages图像后,必须释放其中一个图像,然后才能通过{@link #acquireLatestImage()}或{@link #acquireNextImage()}访问新图像.必须大于0.
标签：android-camera,android 来源： https://codeday.me/bug/20191120/2044811.html