Cache camera stream info to speed up future config generations (#11614)

* Cache camera stream info to speed up future config generations

* Formatting

* fix

frigate/config.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import asyncio
 import json
 import logging
 import os
@@ -46,9 +45,9 @@
  get_ffmpeg_arg_list,
  load_config_with_no_duplicates,
 )
-from frigate.util.config import get_relative_coordinates
+from frigate.util.config import StreamInfoRetriever, get_relative_coordinates
 from frigate.util.image import create_mask
-from frigate.util.services import auto_detect_hwaccel, get_video_properties
+from frigate.util.services import auto_detect_hwaccel
 
 logger = logging.getLogger(__name__)
 
@@ -73,6 +72,9 @@
 DEFAULT_DETECT_DIMENSIONS = {"width": 1280, "height": 720}
 DEFAULT_TIME_LAPSE_FFMPEG_ARGS = "-vf setpts=0.04*PTS -r 30"
 
+# stream info handler
+stream_info_retriever = StreamInfoRetriever()
+
 
 class FrigateBaseModel(BaseModel):
  model_config = ConfigDict(extra="forbid", protected_namespaces=())
@@ -1416,7 +1418,7 @@ def runtime_config(self, plus_api: PlusApi = None) -> FrigateConfig:
  if need_detect_dimensions or need_record_fourcc:
  stream_info = {"width": 0, "height": 0, "fourcc": None}
  try:
- stream_info = asyncio.run(get_video_properties(input.path))
+ stream_info = stream_info_retriever.get_stream_info(input.path)
  except Exception:
  logger.warn(
  f"Error detecting stream parameters automatically for {input.path} Applying default values."

frigate/util/config.py

@@ -1,5 +1,6 @@
 """configuration utils."""
 
+import asyncio
 import logging
 import os
 import shutil
@@ -8,6 +9,7 @@
 from ruamel.yaml import YAML
 
 from frigate.const import CONFIG_DIR, EXPORT_DIR
+from frigate.util.services import get_video_properties
 
 logger = logging.getLogger(__name__)
 
@@ -194,3 +196,16 @@ def get_relative_coordinates(
  return mask
 
  return mask
+
+
+class StreamInfoRetriever:
+ def __init__(self) -> None:
+ self.stream_cache: dict[str, tuple[int, int]] = {}
+
+ def get_stream_info(self, path: str) -> str:
+ if path in self.stream_cache:
+ return self.stream_cache[path]
+
+ info = asyncio.run(get_video_properties(path))
+ self.stream_cache[path] = info
+ return info