fps reduces when image analysis usecase is applied

[donpaul120]

I'm testing on

TECNO POP 2F (b1f) CPU Core-Count = 4 RAM = 1.00G Internal Storage = 16GB Screen Resolution = 960 X 480

I'm using the CameraXBasic Example

The camera preview gets laggy only when the ImageAnalysis use case is applied.

I observed that without the imageAnalysis usecase the frame per seconds is approximately 10 on this device even tho the device will support up to 30fps (Range(lower=30, upper=30)

Below are the supported fps Range Lower => 20, Upper => 20 Lower => 24, Upper => 24 Lower => 5, Upper => 30 Lower => 30, Upper => 30

When ImageAnalsis usecase is applied the fps drops to approximately 3fps

I/BufferQueueProducer: ImageReader-864x480f23m4-18676-0 queueBuffer: fps=2.50 dur=1199.65 max=416.04 min=384.55

And i think this makes the CameraPreview Lag.

Are there any optimization techniques that can be applied to avoid making the preview lag?

I've attempted setting the fps myself but i don't think that has any effect

e.g

        val builder = ImageAnalysis.Builder()
                // We request aspect ratio but no resolution
                .setTargetAspectRatio(screenAspectRatio)
                // Set initial target rotation, we will have to call this again if rotation changes
                // during the lifecycle of this use case
                .setTargetRotation(rotation)
                // The analyzer can then be assigned to the instance

        val camera2Interop = Camera2Interop.Extender(builder)
//        camera2Interop.setCaptureRequestOption(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_OFF)
        camera2Interop.setCaptureRequestOption(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE, Range(30, 30))

[rcagala]

I experience the same issue on Motorola Moto G4.

Sample: CameraXBasic / Commit: 08efec47db982513bc5faa4c3525c128a6e54c32 ("main" branch)

If I remove the ImageAnalysis use case from bindToLifecycle(), the preview FPS is OK.

[ninhkobietnau]

same problem. im using cameraX 1.1.0. even if i upgrade to 1.2.0, it still lagging when add imageAnalysis usecase. it just happened with old android version (such as android 7; 8), it terrible

is there any solution ? or this problem is fixed with higher version CameraX