}
	}
}

type offsetImage struct {
	image.Image
	Rect image.Rectangle
}

func (i offsetImage) Bounds() image.Rectangle {
	return i.Rect
}

func TestEncodeWrappedImage(t *testing.T) {
	m0, err := readImg("../testdata/video-001.gif")
	if err != nil {
		t.Fatalf("readImg: %v", err)
	}

	// Case 1: Encode a wrapped image.Image
	buf := new(bytes.Buffer)