Add more debug logs for preview and output (#14833)

frigate/output/output.py

@@ -63,6 +63,7 @@ def output_frames(
     birdseye: Optional[Birdseye] = None
     preview_recorders: dict[str, PreviewRecorder] = {}
     preview_write_times: dict[str, float] = {}
+    failed_frame_requests: dict[str, int] = {}
 
     move_preview_frames("cache")
 
@@ -99,7 +100,16 @@ def output_frames(
 
         if frame is None:
             logger.debug(f"Failed to get frame {frame_id} from SHM")
+            failed_frame_requests[camera] = failed_frame_requests.get(camera, 0) + 1
+
+            if failed_frame_requests[camera] > config.cameras[camera].detect.fps:
+                logger.warning(
+                    f"Failed to retrieve many frames for {camera} from SHM, consider increasing SHM size if this continues."
+                )
+
             continue
+        else:
+            failed_frame_requests[camera] = 0
 
         # send camera frame to ffmpeg process if websockets are connected
         if any(

frigate/output/preview.py

@@ -154,6 +154,7 @@ class PreviewRecorder:
         self.start_time = 0
         self.last_output_time = 0
         self.output_frames = []
+
         if config.detect.width > config.detect.height:
             self.out_height = PREVIEW_HEIGHT
             self.out_width = (
@@ -274,7 +275,7 @@ class PreviewRecorder:
 
         return False
 
-    def write_frame_to_cache(self, frame_time: float, frame) -> None:
+    def write_frame_to_cache(self, frame_time: float, frame: np.ndarray) -> None:
         # resize yuv frame
         small_frame = np.zeros((self.out_height * 3 // 2, self.out_width), np.uint8)
         copy_yuv_to_position(
@@ -303,7 +304,7 @@ class PreviewRecorder:
         current_tracked_objects: list[dict[str, any]],
         motion_boxes: list[list[int]],
         frame_time: float,
-        frame,
+        frame: np.ndarray,
     ) -> bool:
         # check for updated record config
         _, updated_record_config = self.config_subscriber.check_for_update()
@@ -332,6 +333,10 @@ class PreviewRecorder:
                     self.output_frames,
                     self.requestor,
                 ).start()
+            else:
+                logger.debug(
+                    f"Not saving preview for {self.config.name} because there are no saved frames."
+                )
 
             # reset frame cache
             self.segment_end = (