I am using camera2 api in my android app and want to manually control shutter-speed. This is how I set shutter-speed:
protected void setShutterSpeed(long exposureTime) {
if (null == cameraDevice) {
Log.e(TAG, "updatePreview error, return");
}
captureRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_OFF);
captureRequestBuilder.set(CaptureRequest.SENSOR_SENSITIVITY, 100);
captureRequestBuilder.set(CaptureRequest.SENSOR_EXPOSURE_TIME, exposureTime);
try {
cameraCaptureSessions.setRepeatingRequest(captureRequestBuilder.build(), null, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
This is how I create CaptureRequestBuilder:
captureRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
captureRequestBuilder.addTarget(surface);
captureRequestBuilder.addTarget(imageReader.getSurface());
cameraDevice.createCaptureSession(Arrays.asList(surface, imageReader.getSurface()), new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
//The camera is already closed
if (null == cameraDevice) {
return;
}
// When the session is ready, we start displaying the preview.
cameraCaptureSessions = cameraCaptureSession;
updatePreview();
}
@Override
public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
Toast.makeText(AndroidCameraApi.this, "Configuration change", Toast.LENGTH_SHORT).show();
}
}, null);
The problem is that when I set shutter-speed, it sets ONLY for 1 second or 1 frame and then resets. But it may setts well only for TexturePreview surface when I do not add ImageReaders surface to CaptureRequestBuilder target outputs. So I assume that problem is in ImageReader.
Does anybody know solution for this problem?
P.S. other settings like ISO and Exposure compensation works well for both surfaces.