Add API and WebUI to export recordings (#6550)

* Add ability to export frigate clips

* Add http endpoint

* Add dir to nginx

* Add webUI

* Formatting

* Cleanup unused

* Optimize timelapse

* Fix pts

* Use JSON body for params

* Use hwaccel to encode when available

* Print ffmpeg command when fail

* Print ffmpeg command when fail

* Add separate ffmpeg preset for timelapse

* Add docs outlining the export directory

* Add export docs

* Use ''

* Fix playlist max time

* Lower max playlist time

* Add api docs for export

* isort fixes

frigate/http.py

@@ -35,6 +35,7 @@ from frigate.models import Event, Recordings, Timeline
 from frigate.object_processing import TrackedObject
 from frigate.plus import PlusApi
 from frigate.ptz import OnvifController
+from frigate.record.export import PlaybackFactorEnum, RecordingExporter
 from frigate.stats import stats_snapshot
 from frigate.storage import StorageMaintainer
 from frigate.util import (
@@ -1504,6 +1505,22 @@ def vod_event(id):
     )
 
 
+@bp.route("/export/<camera_name>/start/<start_time>/end/<end_time>", methods=["POST"])
+def export_recording(camera_name: str, start_time: int, end_time: int):
+    playback_factor = request.get_json(silent=True).get("playback", "realtime")
+    exporter = RecordingExporter(
+        current_app.frigate_config,
+        camera_name,
+        int(start_time),
+        int(end_time),
+        PlaybackFactorEnum[playback_factor]
+        if playback_factor in PlaybackFactorEnum.__members__.values()
+        else PlaybackFactorEnum.realtime,
+    )
+    exporter.start()
+    return "Starting export of recording", 200
+
+
 def imagestream(detected_frames_processor, camera_name, fps, height, draw_options):
     while True:
         # max out at specified FPS