CameraX alpha5 bug on target resolution of YUV output?

Question

val imageCaptureConfig = ImageCaptureConfig.Builder().apply {
            setLensFacing(CameraX.LensFacing.FRONT)
            setCaptureMode(CaptureMode.MAX_QUALITY)
            setBufferFormat(ImageFormat.YUV_420_888)
            setTargetResolution(Size(3264, 2448))
            // We request aspect ratio but no resolution to match preview config but letting
            // CameraX optimize for whatever specific resolution best fits requested capture mode
            setTargetAspectRatio(Rational(3,4))
            // Set initial target rotation, we will have to call this again if rotation changes
            // during the lifecycle of this use case
            setTargetRotation(viewFinder.display.rotation)
        }.build()

imageCapture.takePicture(object : ImageCapture.OnImageCapturedListener() {
             override fun onCaptureSuccess(image: ImageProxy?, rotationDegrees: Int) {
                        println("captureSuccess h: ${image?.height} w: ${image?.width}")
                    }
             override fun onError(imageCaptureError: ImageCapture.ImageCaptureError, message: String, cause: Throwable?) {
                        println(message)
             }
          })

Above is the code I set for capture image from Samsung S8 US version, I want to have YUV format with max output resolution which is 3264*2448. However, the result I got is 1440*1080 instead. I tried on S9, and S8 asian version, the code works fine on both phones. It is strange, when I set the format to JPEG it will work on this phone.

and I tried on S7 and pixel 2 as well, pixel 2 can output YUV at the max supported resolution (not the code above), but S7 cannot, also giving me 1080*1440 instead.

Is this a CameraX bug? If it is, is there any work around besides using back to Camera2?

Thanks!

as mentioned in camerax documentation, it is still in development stage, either wait until it is fixed or use camera2 api. — Daniel, Oct 03 '19 at 13:37
Both S7 and S8 have 12MP rear cameras, 4032*3024; why do you write that max output resolution is 3264*2448? — Alex Cohn, Oct 03 '19 at 20:59

score 0 · Answer 1 · answered Oct 04 '19 at 03:49

0

I don't have the specific devices to verify this, but it's not uncommon that a camera can produce better Jpeg resolution than YUV. On the other hand, see this answer to a related question.

answered Oct 04 '19 at 03:49

Alex Cohn

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CameraX alpha5 bug on target resolution of YUV output?

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