feat: add max_size to recording settings

Resolves #9275

docs/docs/configuration/reference.md

@@ -510,6 +510,12 @@ record:
   # Optional: Number of minutes to wait between cleanup runs (default: shown below)
   # This can be used to reduce the frequency of deleting recording segments from disk if you want to minimize i/o
   expire_interval: 60
+  # Optional: Maximum size of recordings in MB or string format (e.g. 10GB). (default: shown below)
+  # This serves as a hard limit for the size of the recordings for this camera.
+  # If the total size of recordings exceeds this limit, the oldest recordings will be deleted
+  # until the total size is below the limit, regardless of retention settings.
+  # 0 means no limit.
+  max_size: 0
   # Optional: Two-way sync recordings database with disk on startup and once a day (default: shown below).
   sync_recordings: False
   # Optional: Continuous retention settings

frigate/config/camera/record.py

@@ -1,10 +1,11 @@
 from enum import Enum
-from typing import Optional
+from typing import Optional, Union
 
-from pydantic import Field
+from pydantic import Field, field_validator
 
 from frigate.const import MAX_PRE_CAPTURE
 from frigate.review.types import SeverityEnum
+from frigate.util.size import parse_size_to_mb
 
 from ..base import FrigateBaseModel
 
@@ -81,6 +82,10 @@ class RecordConfig(FrigateBaseModel):
         default=60,
         title="Number of minutes to wait between cleanup runs.",
     )
+    max_size: Union[float, str] = Field(
+        default=0,
+        title="Maximum size of recordings in MB or string format (e.g. 10GB).",
+    )
     continuous: RecordRetainConfig = Field(
         default_factory=RecordRetainConfig,
         title="Continuous recording retention settings.",
@@ -104,6 +109,16 @@ class RecordConfig(FrigateBaseModel):
         default=None, title="Keep track of original state of recording."
     )
 
+    @field_validator("max_size", mode="before")
+    @classmethod
+    def parse_max_size(cls, v: Union[float, str], info: object) -> float:
+        if isinstance(v, str):
+            try:
+                return parse_size_to_mb(v)
+            except ValueError:
+                raise ValueError(f"Invalid size string: {v}")
+        return v
+
     @property
     def event_pre_capture(self) -> int:
         return max(

frigate/record/cleanup.py

@@ -20,6 +20,17 @@ from frigate.util.time import get_tomorrow_at_time
 logger = logging.getLogger(__name__)
 
 
+def get_directory_size(directory: str) -> float:
+    """Get the size of a directory in MB."""
+    total_size = 0
+    for dirpath, dirnames, filenames in os.walk(directory):
+        for f in filenames:
+            fp = os.path.join(dirpath, f)
+            if not os.path.islink(fp):
+                total_size += os.path.getsize(fp)
+    return total_size / 1000000
+
+
 class RecordingCleanup(threading.Thread):
     """Cleanup existing recordings based on retention config."""
 
@@ -120,6 +131,7 @@ class RecordingCleanup(threading.Thread):
                 Recordings.objects,
                 Recordings.motion,
                 Recordings.dBFS,
+                Recordings.segment_size,
             )
             .where(
                 (Recordings.camera == config.name)
@@ -206,6 +218,10 @@ class RecordingCleanup(threading.Thread):
                 Recordings.id << deleted_recordings_list[i : i + max_deletes]
             ).execute()
 
+        # Check if we need to enforce max_size
+        if config.record.max_size > 0:
+            self.enforce_max_size(config, deleted_recordings)
+
         previews: list[Previews] = (
             Previews.select(
                 Previews.id,
@@ -266,6 +282,52 @@ class RecordingCleanup(threading.Thread):
                 Previews.id << deleted_previews_list[i : i + max_deletes]
             ).execute()
 
+    def enforce_max_size(
+        self, config: CameraConfig, deleted_recordings: set[str]
+    ) -> None:
+        """Ensure that the camera recordings do not exceed the max size."""
+        # Get all recordings for this camera
+        recordings: Recordings = (
+            Recordings.select(
+                Recordings.id,
+                Recordings.path,
+                Recordings.segment_size,
+            )
+            .where(
+                (Recordings.camera == config.name)
+                & (Recordings.id.not_in(list(deleted_recordings)))
+            )
+            .order_by(Recordings.start_time)
+            .namedtuples()
+            .iterator()
+        )
+
+        total_size = 0
+        recordings_list = []
+        for recording in recordings:
+            recordings_list.append(recording)
+            total_size += recording.segment_size
+
+        # If the total size is less than the max size, we are good
+        if total_size <= config.record.max_size:
+            return
+
+        # Delete recordings until we are under the max size
+        recordings_to_delete = []
+        for recording in recordings_list:
+            total_size -= recording.segment_size
+            recordings_to_delete.append(recording.id)
+            Path(recording.path).unlink(missing_ok=True)
+            if total_size <= config.record.max_size:
+                break
+
+        # Delete from database
+        max_deletes = 100000
+        for i in range(0, len(recordings_to_delete), max_deletes):
+            Recordings.delete().where(
+                Recordings.id << recordings_to_delete[i : i + max_deletes]
+            ).execute()
+
     def expire_recordings(self) -> None:
         """Delete recordings based on retention config."""
         logger.debug("Start expire recordings.")

frigate/test/test_config.py

@@ -429,6 +429,29 @@ class TestConfig(unittest.TestCase):
         frigate_config = FrigateConfig(**config)
         assert "-rtsp_transport" in frigate_config.cameras["back"].ffmpeg_cmds[0]["cmd"]
 
+    def test_record_max_size_validation(self):
+        config = {
+            "mqtt": {"host": "mqtt"},
+            "record": {"max_size": "10GB"},
+            "cameras": {
+                "back": {
+                    "ffmpeg": {
+                        "inputs": [
+                            {"path": "rtsp://10.0.0.1:554/video", "roles": ["detect"]}
+                        ]
+                    },
+                    "detect": {
+                        "height": 1080,
+                        "width": 1920,
+                        "fps": 5,
+                    },
+                }
+            },
+        }
+
+        frigate_config = FrigateConfig(**config)
+        assert frigate_config.record.max_size == 10000
+
     def test_ffmpeg_params_global(self):
         config = {
             "ffmpeg": {"input_args": "-re"},

frigate/test/test_record_retention.py

@@ -31,3 +31,15 @@ class TestRecordRetention(unittest.TestCase):
         )
         assert not segment_info.should_discard_segment(RetainModeEnum.motion)
         assert segment_info.should_discard_segment(RetainModeEnum.active_objects)
+
+    def test_size_utility(self):
+        from frigate.util.size import parse_size_to_mb
+
+        assert parse_size_to_mb("10GB") == 10240
+        assert parse_size_to_mb("10MB") == 10
+        assert parse_size_to_mb("1024KB") == 1
+        assert parse_size_to_mb("1048576B") == 1
+        assert parse_size_to_mb("10") == 10
+
+        with self.assertRaises(ValueError):
+            parse_size_to_mb("invalid")

frigate/util/size.py

@@ -0,0 +1,21 @@
+"""Utility for parsing size strings."""
+
+
+def parse_size_to_mb(size_str: str) -> float:
+    """Parse a size string to megabytes."""
+    size_str = size_str.strip().upper()
+    if size_str.endswith("TB"):
+        return float(size_str[:-2]) * 1024 * 1024
+    elif size_str.endswith("GB"):
+        return float(size_str[:-2]) * 1024
+    elif size_str.endswith("MB"):
+        return float(size_str[:-2])
+    elif size_str.endswith("KB"):
+        return float(size_str[:-2]) / 1024
+    elif size_str.endswith("B"):
+        return float(size_str[:-1]) / (1024 * 1024)
+    else:
+        try:
+            return float(size_str)
+        except ValueError:
+            raise ValueError(f"Invalid size string: {size_str}")