respect ui.timezone when generating fallback export names

frigate/record/export.py

@@ -13,6 +13,7 @@ from enum import Enum
 from pathlib import Path
 from typing import Callable, Optional
 
+import pytz
 from peewee import DoesNotExist
 
 from frigate.config import FfmpegConfig, FrigateConfig
@@ -344,7 +345,19 @@ class RecordingExporter(threading.Thread):
         return proc.returncode, "".join(captured)
 
     def get_datetime_from_timestamp(self, timestamp: int) -> str:
-        # return in iso format
+        # return in iso format using the configured ui.timezone when set,
+        # so the auto-generated export name reflects local time rather
+        # than the container's UTC clock
+        tz_name = self.config.ui.timezone
+        if tz_name:
+            try:
+                tz = pytz.timezone(tz_name)
+            except pytz.UnknownTimeZoneError:
+                tz = None
+            if tz is not None:
+                return datetime.datetime.fromtimestamp(timestamp, tz=tz).strftime(
+                    "%Y-%m-%d %H:%M:%S"
+                )
         return datetime.datetime.fromtimestamp(timestamp).strftime("%Y-%m-%d %H:%M:%S")
 
     def _chapter_metadata_path(self) -> str:

frigate/test/test_export_progress.py

@@ -363,6 +363,33 @@ class TestBroadcastAggregation(unittest.TestCase):
         assert job.progress_percent == 33.0
 
 
+class TestGetDatetimeFromTimestamp(unittest.TestCase):
+    """Auto-generated export name should honor config.ui.timezone, not
+    fall back to the container's UTC clock when a timezone is configured.
+    """
+
+    def test_uses_configured_ui_timezone(self) -> None:
+        exporter = _make_exporter()
+        exporter.config.ui.timezone = "America/New_York"
+        # 2025-01-15 12:00:00 UTC is 07:00:00 EST
+        assert (
+            exporter.get_datetime_from_timestamp(1736942400)
+            == "2025-01-15 07:00:00"
+        )
+
+    def test_falls_back_to_local_when_timezone_unset(self) -> None:
+        exporter = _make_exporter()
+        exporter.config.ui.timezone = None
+        # No assertion on the exact wall-clock value — just confirm no
+        # exception and that pytz isn't required when the field is unset.
+        assert isinstance(exporter.get_datetime_from_timestamp(1736942400), str)
+
+    def test_invalid_timezone_falls_back_to_local(self) -> None:
+        exporter = _make_exporter()
+        exporter.config.ui.timezone = "Not/A_Real_Zone"
+        assert isinstance(exporter.get_datetime_from_timestamp(1736942400), str)
+
+
 class TestSchedulesCleanup(unittest.TestCase):
     def test_schedule_job_cleanup_removes_after_delay(self) -> None:
         config = MagicMock()