Why does the focusing method force the removal of AWB that has been manually set?

[yihao wu]

I set AWB, but after calling the focus method, the AWB I set is invalid. Why?

[yihao wu]

Hello, I have a question, why is it set to automatic every time?

[Scott Nien]

Hi Yihao, 

If your app sets the capture request parameters via Camera2Interop or Camera2CameraControl,  it should have higher priority than what CameraX sets. 

The CONTROL_AWB_MODE is always set even when focus is not called.  

Are you trying to set AWB_MODE to something other than AUTO via Camera2Interop or Camera2CameraControl ? 

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[yihao wu]

Thank you. I have tried to set up awb. This is the way I use it. I just tried to set awb before focusing back, and I found that it will still be cleared. Can you try it? I suspect my setting has been overwritten.

cameraController?.cameraControl?.let { control ->
Camera2CameraControl.from(control).addCaptureRequestOptions(
CaptureRequestOptions.Builder()
.setCaptureRequestOption(CaptureRequest.CONTROL_AWB_MODE, awbMode.value)
.build()
)

[Scott Nien]

I confirmed it will override the value set in CameraX. 

Would it be possible that your device doesn't support the AWB mode that you set via Camera2CameraControl so it stays in AUTO ?  
Can you also check the value in CaptureRequest instead of TotalCaptureResult to see if the parameter is correct ?  

[yihao wu]

My device is supported, because our app has an entrance to set awb, and the preview will be effective after I set it up。

Does it have anything to do with priority?
For example, I set up awb, but your code will change my setting to automatic.
It seems to me that the code does not get the current awb, but directly sets the awb supported by the device.

[Scott Nien]

What is the CameraX version that you were using ?  

[yihao wu]

1.2.0-alpha03

[yihao wu]

Hello, will this happen to you? Does the upgraded version work?

在2022年11月25日星期五 UTC+8 11:57:00<scot...@google.com> 写道：

[Scott Nien]

Setting AWB_MODE works for me using 1.2.0-alpha3 on CameraXBasic on Pixel 5. 

We probably need more code snippets to debug. 

[yihao wu]

Can you show me your code?
I set the AWB before focusing, and then the AWB is reset. Thank you.

[Scott Nien]

Please see sample codes below:

camera = cameraProvider.bindToLifecycle(
        this, cameraSelector, preview, imageCapture, imageAnalyzer)

Camera2CameraControl.from(camera!!.cameraControl)
    .addCaptureRequestOptions(
        androidx.camera.camera2.interop.CaptureRequestOptions.Builder()
            .setCaptureRequestOption(
                android.hardware.camera2.CaptureRequest.CONTROL_AWB_MODE,
                android.hardware.camera2.CaptureRequest.CONTROL_AWB_MODE_DAYLIGHT
            )
            .build()
    )

[yihao wu]

I see that your code is similar to mine, and then you will focus after you set up AWB. Is AWB still there?

[Scott Nien]

Yes,  after tap-to-focus (cameraControl#startFocusAndMetering),  the AWB mode is still there. 

[yihao wu]

Thank you. It's no problem for me to try it with demo myself. I think I should continue to see what's wrong with my project.

[Scott Nien]

Not sure what went wrong.  The only difference between addCaptureRequestOptions and setCaptureRequestOptions is that setCaptureRequestOptions will clear the existing options first while addCaptureRequestOptions won't. 

On Wed, Nov 30, 2022 at 6:19 PM yihao wu <wuy...@insta360.com> wrote:

I found the problem. I used addCaptureRequestOptions instead of setCaptureRequestOptions.

在2022年11月30日星期三 UTC+8 11:48:09<scot...@google.com> 写道：