From f09b742321473bce0e0e005dd9bc23149d9ad62e Mon Sep 17 00:00:00 2001
From: ryzendigo <48058157+ryzendigo@users.noreply.github.com>
Date: Mon, 16 Mar 2026 14:47:55 +0800
Subject: [PATCH] fix: unbound yuv_frame after FileNotFoundError in embeddings

Both _process_updates() and _process_frame_updates() catch
FileNotFoundError from frame_manager.get() but don't assign
yuv_frame before the try block. If the exception fires, yuv_frame
is never assigned and the subsequent 'if yuv_frame is None' check
raises UnboundLocalError instead of gracefully returning.

Initialize yuv_frame = None before each try block.
---
 frigate/embeddings/maintainer.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/frigate/embeddings/maintainer.py b/frigate/embeddings/maintainer.py
index 2c61c5fe9..46077375d 100644
--- a/frigate/embeddings/maintainer.py
+++ b/frigate/embeddings/maintainer.py
@@ -451,13 +451,13 @@ class EmbeddingMaintainer(threading.Thread):
             return
 
         # Create our own thumbnail based on the bounding box and the frame time
+        yuv_frame = None
         try:
             yuv_frame = self.frame_manager.get(
                 frame_name, camera_config.frame_shape_yuv
             )
         except FileNotFoundError:
             logger.debug(f"Frame {frame_name} not found for camera {camera}")
-            pass
 
         if yuv_frame is None:
             logger.debug(
@@ -672,6 +672,7 @@ class EmbeddingMaintainer(threading.Thread):
             # no active features that use this data
             return
 
+        yuv_frame = None
         try:
             yuv_frame = self.frame_manager.get(
                 frame_name, camera_config.frame_shape_yuv