Audio transcription support (#18398)

* install new packages for transcription support

* add config options

* audio maintainer modifications to support transcription

* pass main config to audio process

* embeddings support

* api and transcription post processor

* embeddings maintainer support for post processor

* live audio transcription with sherpa and faster-whisper

* update dispatcher with live transcription topic

* frontend websocket

* frontend live transcription

* frontend changes for speech events

* i18n changes

* docs

* mqtt docs

* fix linter

* use float16 and small model on gpu for real-time

* fix return value and use requestor to embed description instead of passing embeddings

* run real-time transcription in its own thread

* tweaks

* publish live transcriptions on their own topic instead of tracked_object_update

* config validator and docs

* clarify docs

frigate/config/camera/camera.py

@@ -19,6 +19,7 @@ from frigate.util.builtin import (
 
 from ..base import FrigateBaseModel
 from ..classification import (
+    AudioTranscriptionConfig,
     CameraFaceRecognitionConfig,
     CameraLicensePlateRecognitionConfig,
 )
@@ -56,6 +57,9 @@ class CameraConfig(FrigateBaseModel):
     audio: AudioConfig = Field(
         default_factory=AudioConfig, title="Audio events configuration."
     )
+    audio_transcription: AudioTranscriptionConfig = Field(
+        default_factory=AudioTranscriptionConfig, title="Audio transcription config."
+    )
     birdseye: BirdseyeCameraConfig = Field(
         default_factory=BirdseyeCameraConfig, title="Birdseye camera configuration."
     )