Force birdseye to standard aspect ratio (#7994)

* Force birdseye to standard aspect ratio

* Make rounding consistent

* Formatting

frigate/test/test_birdseye.py

@@ -0,0 +1,47 @@
+"""Test camera user and password cleanup."""
+
+import unittest
+
+from frigate.output import get_canvas_shape
+
+
+class TestBirdseye(unittest.TestCase):
+    def test_16x9(self):
+        """Test 16x9 aspect ratio works as expected for birdseye."""
+        width = 1280
+        height = 720
+        canvas_width, canvas_height = get_canvas_shape(width, height)
+        assert canvas_width == width
+        assert canvas_height == height
+
+    def test_4x3(self):
+        """Test 4x3 aspect ratio works as expected for birdseye."""
+        width = 1280
+        height = 960
+        canvas_width, canvas_height = get_canvas_shape(width, height)
+        assert canvas_width == width
+        assert canvas_height == height
+
+    def test_32x9(self):
+        """Test 32x9 aspect ratio works as expected for birdseye."""
+        width = 2560
+        height = 720
+        canvas_width, canvas_height = get_canvas_shape(width, height)
+        assert canvas_width == width
+        assert canvas_height == height
+
+    def test_9x16(self):
+        """Test 9x16 aspect ratio works as expected for birdseye."""
+        width = 720
+        height = 1280
+        canvas_width, canvas_height = get_canvas_shape(width, height)
+        assert canvas_width == width
+        assert canvas_height == height
+
+    def test_non_16x9(self):
+        """Test non 16x9 aspect ratio fails for birdseye."""
+        width = 1280
+        height = 840
+        canvas_width, canvas_height = get_canvas_shape(width, height)
+        assert canvas_width == width  # width will be the same
+        assert canvas_height != height