Debug replay (#22212)

* debug replay implementation

* fix masks after dev rebase

* fix squash merge issues

* fix

* fix

* fix

* no need to write debug replay camera to config

* camera and filter button and dropdown

* add filters

* add ability to edit motion and object config for debug replay

* add debug draw overlay to debug replay

* add guard to prevent crash when camera is no longer in camera_states

* fix overflow due to radix absolutely positioned elements

* increase number of messages

* ensure deep_merge replaces existing list values when override is true

* add back button

* add debug replay to explore and review menus

* clean up

* clean up

* update instructions to prevent exposing exception info

* fix typing

* refactor output logic

* refactor with helper function

* move init to function for consistency

frigate/api/debug_replay.py

@@ -0,0 +1,176 @@
+"""Debug replay API endpoints."""
+
+import asyncio
+import logging
+from datetime import datetime
+
+from fastapi import APIRouter, Depends, Request
+from fastapi.responses import JSONResponse
+from pydantic import BaseModel, Field
+
+from frigate.api.auth import require_role
+from frigate.api.defs.tags import Tags
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(tags=[Tags.app])
+
+
+class DebugReplayStartBody(BaseModel):
+    """Request body for starting a debug replay session."""
+
+    camera: str = Field(title="Source camera name")
+    start_time: float = Field(title="Start timestamp")
+    end_time: float = Field(title="End timestamp")
+
+
+class DebugReplayStartResponse(BaseModel):
+    """Response for starting a debug replay session."""
+
+    success: bool
+    replay_camera: str
+
+
+class DebugReplayStatusResponse(BaseModel):
+    """Response for debug replay status."""
+
+    active: bool
+    replay_camera: str | None = None
+    source_camera: str | None = None
+    start_time: float | None = None
+    end_time: float | None = None
+    live_ready: bool = False
+
+
+class DebugReplayStopResponse(BaseModel):
+    """Response for stopping a debug replay session."""
+
+    success: bool
+
+
+@router.post(
+    "/debug_replay/start",
+    response_model=DebugReplayStartResponse,
+    dependencies=[Depends(require_role(["admin"]))],
+    summary="Start debug replay",
+    description="Start a debug replay session from camera recordings.",
+)
+async def start_debug_replay(request: Request, body: DebugReplayStartBody):
+    """Start a debug replay session."""
+    replay_manager = request.app.replay_manager
+
+    if replay_manager.active:
+        return JSONResponse(
+            content={
+                "success": False,
+                "message": "A replay session is already active",
+            },
+            status_code=409,
+        )
+
+    try:
+        replay_camera = await asyncio.to_thread(
+            replay_manager.start,
+            source_camera=body.camera,
+            start_ts=body.start_time,
+            end_ts=body.end_time,
+            frigate_config=request.app.frigate_config,
+            config_publisher=request.app.config_publisher,
+        )
+    except ValueError:
+        logger.exception("Invalid parameters for debug replay start request")
+        return JSONResponse(
+            content={
+                "success": False,
+                "message": "Invalid debug replay request parameters",
+            },
+            status_code=400,
+        )
+    except RuntimeError:
+        logger.exception("Error while starting debug replay session")
+        return JSONResponse(
+            content={
+                "success": False,
+                "message": "An internal error occurred while starting debug replay",
+            },
+            status_code=500,
+        )
+
+    return DebugReplayStartResponse(
+        success=True,
+        replay_camera=replay_camera,
+    )
+
+
+@router.get(
+    "/debug_replay/status",
+    response_model=DebugReplayStatusResponse,
+    dependencies=[Depends(require_role(["admin"]))],
+    summary="Get debug replay status",
+    description="Get the status of the current debug replay session.",
+)
+def get_debug_replay_status(request: Request):
+    """Get the current replay session status."""
+    replay_manager = request.app.replay_manager
+
+    live_ready = False
+    replay_camera = replay_manager.replay_camera_name
+
+    if replay_manager.active and replay_camera:
+        frame_processor = request.app.detected_frames_processor
+        frame = frame_processor.get_current_frame(replay_camera)
+
+        if frame is not None:
+            frame_time = frame_processor.get_current_frame_time(replay_camera)
+            camera_config = request.app.frigate_config.cameras.get(replay_camera)
+            retry_interval = 10
+
+            if camera_config is not None:
+                retry_interval = float(camera_config.ffmpeg.retry_interval or 10)
+
+            live_ready = datetime.now().timestamp() <= frame_time + retry_interval
+
+    return DebugReplayStatusResponse(
+        active=replay_manager.active,
+        replay_camera=replay_camera,
+        source_camera=replay_manager.source_camera,
+        start_time=replay_manager.start_ts,
+        end_time=replay_manager.end_ts,
+        live_ready=live_ready,
+    )
+
+
+@router.post(
+    "/debug_replay/stop",
+    response_model=DebugReplayStopResponse,
+    dependencies=[Depends(require_role(["admin"]))],
+    summary="Stop debug replay",
+    description="Stop the active debug replay session and clean up all artifacts.",
+)
+async def stop_debug_replay(request: Request):
+    """Stop the active replay session."""
+    replay_manager = request.app.replay_manager
+
+    if not replay_manager.active:
+        return JSONResponse(
+            content={"success": False, "message": "No active replay session"},
+            status_code=400,
+        )
+
+    try:
+        await asyncio.to_thread(
+            replay_manager.stop,
+            frigate_config=request.app.frigate_config,
+            config_publisher=request.app.config_publisher,
+        )
+    except (ValueError, RuntimeError, OSError) as e:
+        logger.error("Error stopping replay: %s", e)
+        return JSONResponse(
+            content={
+                "success": False,
+                "message": "Failed to stop replay session due to an internal error.",
+            },
+            status_code=500,
+        )
+
+    return DebugReplayStopResponse(success=True)