FEAT: Support for ffmpeg presets (#3840)

* Add hwaccel presets

* Use hwaccel presets

* Add input arg presets

* Use input arg presets

* Make util to clean up redundant code

* Add support for output arg presets

* Add tests

* Update camera specific to use presets

* Update hwaccel to use presets

* Format files and fix tests

* Rewrite tests to test record correctly

* Move presets from string to list to avoid manually separating into a list

* Add mjpeg cuvid decoder preset

* Fix tests

* Fix comment

frigate/util.py

@@ -13,7 +13,7 @@ from abc import ABC, abstractmethod
 from collections import Counter
 from collections.abc import Mapping
 from multiprocessing import shared_memory
-from typing import AnyStr
+from typing import Any, AnyStr
 
 import cv2
 import numpy as np
@@ -886,6 +886,11 @@ def vainfo_hwaccel() -> sp.CompletedProcess:
     return sp.run(ffprobe_cmd, capture_output=True)
 
 
+def get_ffmpeg_arg_list(arg: Any) -> list:
+    """Use arg if list or convert to list format."""
+    return arg if isinstance(arg, list) else arg.split(" ")
+
+
 class FrameManager(ABC):
     @abstractmethod
     def create(self, name, size) -> AnyStr: