maintain aspect ratio for birdseye

frigate/output.py

@@ -193,8 +193,6 @@ class BirdsEyeFrameManager:
             ]
         )
 
-        logger.debug(f"Active cameras: {active_cameras}")
-
         # if there are no active cameras
         if len(active_cameras) == 0:
             # if the layout is already cleared
@@ -209,7 +207,6 @@ class BirdsEyeFrameManager:
 
         # calculate layout dimensions
         layout_dim = math.ceil(math.sqrt(len(active_cameras)))
-        logger.debug(f"New calculated layout dimensions: {layout_dim}")
 
         # reset the layout if it needs to be different
         if layout_dim != self.layout_dim:

frigate/test/test_copy_yuv_to_position.py

@@ -1,7 +1,7 @@
 import cv2
 import numpy as np
 from unittest import TestCase, main
-from frigate.util import copy_yuv_to_position
+from frigate.util import get_yuv_crop, copy_yuv_to_position
 
 
 class TestCopyYuvToPosition(TestCase):
@@ -11,14 +11,53 @@ class TestCopyYuvToPosition(TestCase):
         self.source_yuv_frame = cv2.cvtColor(
             self.source_frame_bgr, cv2.COLOR_BGR2YUV_I420
         )
+        y, u1, u2, v1, v2 = get_yuv_crop(
+            self.source_yuv_frame.shape,
+            (
+                0,
+                0,
+                self.source_frame_bgr.shape[1],
+                self.source_frame_bgr.shape[0],
+            ),
+        )
+        self.source_channel_dims = {
+            "y": y,
+            "u1": u1,
+            "u2": u2,
+            "v1": v1,
+            "v2": v2,
+        }
 
         self.dest_frame_bgr = np.zeros((400, 800, 3), np.uint8)
         self.dest_frame_bgr[:] = (112, 202, 50)
         self.dest_frame_bgr[100:300, 200:600] = (255, 0, 0)
         self.dest_yuv_frame = cv2.cvtColor(self.dest_frame_bgr, cv2.COLOR_BGR2YUV_I420)
 
-    def test_copy_yuv_to_position(self):
-        copy_yuv_to_position(1, self.dest_yuv_frame, 3)
+    def test_clear_position(self):
+        copy_yuv_to_position(self.dest_yuv_frame, (100, 100), (100, 100))
+        # cv2.imwrite(f"source_frame_yuv.jpg", self.source_yuv_frame)
+        # cv2.imwrite(f"dest_frame_yuv.jpg", self.dest_yuv_frame)
+
+    def test_copy_position(self):
+        copy_yuv_to_position(
+            self.dest_yuv_frame,
+            (100, 100),
+            (100, 200),
+            self.source_yuv_frame,
+            self.source_channel_dims,
+        )
+
+    # cv2.imwrite(f"source_frame_yuv.jpg", self.source_yuv_frame)
+    # cv2.imwrite(f"dest_frame_yuv.jpg", self.dest_yuv_frame)
+
+    def test_copy_position_full_screen(self):
+        copy_yuv_to_position(
+            self.dest_yuv_frame,
+            (0, 0),
+            (400, 800),
+            self.source_yuv_frame,
+            self.source_channel_dims,
+        )
         # cv2.imwrite(f"source_frame_yuv.jpg", self.source_yuv_frame)
         # cv2.imwrite(f"dest_frame_yuv.jpg", self.dest_yuv_frame)
 

frigate/util.py

@@ -343,51 +343,86 @@ def copy_yuv_to_position(
         # clear v2
         destination_frame[v2[1] : v2[3], v2[0] : v2[2]] = 128
     else:
+        # calculate the resized frame, maintaining the aspect ratio
+        source_aspect_ratio = source_frame.shape[1] / (source_frame.shape[0] // 3 * 2)
+        dest_aspect_ratio = destination_shape[1] / destination_shape[0]
+
+        if source_aspect_ratio <= dest_aspect_ratio:
+            y_resize_height = int(destination_shape[0] // 4 * 4)
+            y_resize_width = int((y_resize_height * source_aspect_ratio) // 4 * 4)
+        else:
+            y_resize_width = int(destination_shape[1] // 4 * 4)
+            y_resize_height = int((y_resize_width / source_aspect_ratio) // 4 * 4)
+
+        uv_resize_width = int(y_resize_width // 2)
+        uv_resize_height = int(y_resize_height // 4)
+
+        y_y_offset = int((destination_shape[0] - y_resize_height) / 4 // 4 * 4)
+        y_x_offset = int((destination_shape[1] - y_resize_width) / 2 // 4 * 4)
+
+        uv_y_offset = y_y_offset // 4
+        uv_x_offset = y_x_offset // 2
+
         interpolation = cv2.INTER_LINEAR
         # resize/copy y channel
-        destination_frame[y[1] : y[3], y[0] : y[2]] = cv2.resize(
+        destination_frame[
+            y[1] + y_y_offset : y[1] + y_y_offset + y_resize_height,
+            y[0] + y_x_offset : y[0] + y_x_offset + y_resize_width,
+        ] = cv2.resize(
             source_frame[
                 source_channel_dim["y"][1] : source_channel_dim["y"][3],
                 source_channel_dim["y"][0] : source_channel_dim["y"][2],
             ],
-            dsize=(y[2] - y[0], y[3] - y[1]),
+            dsize=(y_resize_width, y_resize_height),
             interpolation=interpolation,
         )
 
         # resize/copy u1
-        destination_frame[u1[1] : u1[3], u1[0] : u1[2]] = cv2.resize(
+        destination_frame[
+            u1[1] + uv_y_offset : u1[1] + uv_y_offset + uv_resize_height,
+            u1[0] + uv_x_offset : u1[0] + uv_x_offset + uv_resize_width,
+        ] = cv2.resize(
             source_frame[
                 source_channel_dim["u1"][1] : source_channel_dim["u1"][3],
                 source_channel_dim["u1"][0] : source_channel_dim["u1"][2],
             ],
-            dsize=(u1[2] - u1[0], u1[3] - u1[1]),
+            dsize=(uv_resize_width, uv_resize_height),
             interpolation=interpolation,
         )
         # resize/copy u2
-        destination_frame[u2[1] : u2[3], u2[0] : u2[2]] = cv2.resize(
+        destination_frame[
+            u2[1] + uv_y_offset : u2[1] + uv_y_offset + uv_resize_height,
+            u2[0] + uv_x_offset : u2[0] + uv_x_offset + uv_resize_width,
+        ] = cv2.resize(
             source_frame[
                 source_channel_dim["u2"][1] : source_channel_dim["u2"][3],
                 source_channel_dim["u2"][0] : source_channel_dim["u2"][2],
             ],
-            dsize=(u2[2] - u2[0], u2[3] - u2[1]),
+            dsize=(uv_resize_width, uv_resize_height),
             interpolation=interpolation,
         )
         # resize/copy v1
-        destination_frame[v1[1] : v1[3], v1[0] : v1[2]] = cv2.resize(
+        destination_frame[
+            v1[1] + uv_y_offset : v1[1] + uv_y_offset + uv_resize_height,
+            v1[0] + uv_x_offset : v1[0] + uv_x_offset + uv_resize_width,
+        ] = cv2.resize(
             source_frame[
                 source_channel_dim["v1"][1] : source_channel_dim["v1"][3],
                 source_channel_dim["v1"][0] : source_channel_dim["v1"][2],
             ],
-            dsize=(v1[2] - v1[0], v1[3] - v1[1]),
+            dsize=(uv_resize_width, uv_resize_height),
             interpolation=interpolation,
         )
         # resize/copy v2
-        destination_frame[v2[1] : v2[3], v2[0] : v2[2]] = cv2.resize(
+        destination_frame[
+            v2[1] + uv_y_offset : v2[1] + uv_y_offset + uv_resize_height,
+            v2[0] + uv_x_offset : v2[0] + uv_x_offset + uv_resize_width,
+        ] = cv2.resize(
             source_frame[
                 source_channel_dim["v2"][1] : source_channel_dim["v2"][3],
                 source_channel_dim["v2"][0] : source_channel_dim["v2"][2],
             ],
-            dsize=(v2[2] - v2[0], v2[3] - v2[1]),
+            dsize=(uv_resize_width, uv_resize_height),
             interpolation=interpolation,
         )