When encoding webp images using umat, the quality parameter does not work

[jpyo0613]

    fun encodeWebP(uMat: UMat): ByteArray {
        val param = IntPointer(1).put(opencv_imgcodecs.IMWRITE_WEBP_QUALITY, 55)
        val bytePointer = BytePointer()
        opencv_imgcodecs.imencode(".webp", uMat, bytePointer, param)
        val length = bytePointer.limit().toInt()
        val result = ByteArray(length)
        bytePointer.get(result)
        return result
    }

use UMat result =

use Mat result =

Is it a bug in javacv or am I using it incorrectly?

[saudet]

Duplicate of https://github.com/bytedeco/javacpp-presets/issues/1345