Poor compression from jpeg to avif in code.

[dAvagimyan]

Hi there! I'm using govips to convert jpg to avif. And I discovered that conversion from code works worse for me than conversion from the console. Could you help me figure it out? On large files the difference is 3 times. There is no such behavior with webp conversion

I tried effort with different values also with default cnf NewAvifExportParams()

size -> 1327450 -> cats.jpg - original
size ->1003222 -> cats.avif - via go code
size -> 404594 -> cats_inconsole.avif - via console (vips copy cats.jpg cats.avif )

It is golang code

inputImage, err := vips.NewImageFromFile("resources/cats.jpg")
	if err != nil {
		return err
	}
	defer inputImage.Close()
	if err := inputImage.OptimizeICCProfile(); err != nil {
		return err
	}

	ep := vips.NewAvifExportParams()
	ep.StripMetadata = true
	ep.Quality = 75
	ep.Effort = 1
	ep.Bitdepth = 8
	ep.Lossless = false

	imageBytes, _, err := inputImage.ExportAvif(ep)
	if err != nil {
		return err
	}

	_ = ioutil.WriteFile("cats.avif", imageBytes, 0644)

it is origin;