SHM tweaks (#15274)

* Use env var to control max number of frames

* Handle type

* Fix frame_name not being sent

* Formatting

frigate/app.py

@@ -36,6 +36,7 @@ from frigate.const import (
     EXPORT_DIR,
     MODEL_CACHE_DIR,
     RECORD_DIR,
+    SHM_FRAMES_VAR,
 )
 from frigate.db.sqlitevecq import SqliteVecQueueDatabase
 from frigate.embeddings import EmbeddingsContext, manage_embeddings
@@ -523,7 +524,10 @@ class FrigateApp:
         if cam_total_frame_size == 0.0:
             return 0
 
-        shm_frame_count = min(200, int(available_shm / (cam_total_frame_size)))
+        shm_frame_count = min(
+            int(os.environ.get(SHM_FRAMES_VAR, "50")),
+            int(available_shm / (cam_total_frame_size)),
+        )
 
         logger.debug(
             f"Calculated total camera size {available_shm} / {cam_total_frame_size} :: {shm_frame_count} frames for each camera in SHM"

frigate/const.py

@@ -13,6 +13,8 @@ FRIGATE_LOCALHOST = "http://127.0.0.1:5000"
 PLUS_ENV_VAR = "PLUS_API_KEY"
 PLUS_API_HOST = "https://api.frigate.video"
 
+SHM_FRAMES_VAR = "SHM_MAX_FRAMES"
+
 # Attribute & Object constants
 
 DEFAULT_ATTRIBUTE_LABEL_MAP = {

frigate/review/maintainer.py

@@ -480,7 +480,9 @@ class ReviewSegmentMaintainer(threading.Thread):
 
             if not self.config.cameras[camera].record.enabled:
                 if current_segment:
-                    self.update_existing_segment(current_segment, frame_time, [])
+                    self.update_existing_segment(
+                        current_segment, frame_name, frame_time, []
+                    )
 
                 continue