androidx camera2 video capture with flash

Question

I am looking to use camera2 for image and video capture. I found that for image capture I can use the method .setFlashMode(flash_type) but the video capture object does not have this.

CameraManager camManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
    String cameraId = null; 
    try {
        cameraId = camManager.getCameraIdList()[0];
        camManager.setTorchMode(cameraId, true);   //Turn ON
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }

I have tried using this method where I would turn on the flash before the video capture but was hit with an error which was due to the camera already being in use.

So, I am wondering, is this even possible in androidx yet?

score 1 · Answer 1 · answered Sep 12 '21 at 23:37

1

Video capture in CameraX is not yet even an alpha-version public API, so it's very possible it doesn't yet support flash control.

answered Sep 12 '21 at 23:37

Eddy Talvala

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I found a solution that is not part of the API in the same way as a camera but it is part of the VideoCapture class. – Callum Osborne Sep 30 '21 at 21:29

score 0 · Accepted Answer · answered Sep 30 '21 at 21:32

I found a solution over at the issue tracker for androidx.camera which seems to work.

if (flash_type == ImageCapture.FLASH_MODE_ON)
    videoCapture.getCamera().getCameraControl().enableTorch(true);

Any then do the opposite when stopping the video capture.

androidx camera2 video capture with flash

2 Answers2