Fix shared memory frames being stuck when a camera capture crashed (#14140)

* Fix shared memory frames being stuck when a camera capture crashed

* Update ffmpeg build

docker/main/install_deps.sh

@@ -44,7 +44,7 @@ if [[ "${TARGETARCH}" == "amd64" ]]; then
     wget -qO btbn-ffmpeg.tar.xz "https://github.com/NickM-27/FFmpeg-Builds/releases/download/autobuild-2022-07-31-12-37/ffmpeg-n5.1-2-g915ef932a3-linux64-gpl-5.1.tar.xz"
     tar -xf btbn-ffmpeg.tar.xz -C /usr/lib/ffmpeg/5.0 --strip-components 1
     rm -rf btbn-ffmpeg.tar.xz /usr/lib/ffmpeg/5.0/doc /usr/lib/ffmpeg/5.0/bin/ffplay
-    wget -qO btbn-ffmpeg.tar.xz "https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2024-09-19-12-51/ffmpeg-n7.0.2-18-g3e6cec1286-linux64-gpl-7.0.tar.xz"
+    wget -qO btbn-ffmpeg.tar.xz "https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2024-09-30-15-36/ffmpeg-n7.1-linux64-gpl-7.1.tar.xz"
     tar -xf btbn-ffmpeg.tar.xz -C /usr/lib/ffmpeg/7.0 --strip-components 1
     rm -rf btbn-ffmpeg.tar.xz /usr/lib/ffmpeg/7.0/doc /usr/lib/ffmpeg/7.0/bin/ffplay
 fi
@@ -56,7 +56,7 @@ if [[ "${TARGETARCH}" == "arm64" ]]; then
     wget -qO btbn-ffmpeg.tar.xz "https://github.com/NickM-27/FFmpeg-Builds/releases/download/autobuild-2022-07-31-12-37/ffmpeg-n5.1-2-g915ef932a3-linuxarm64-gpl-5.1.tar.xz"
     tar -xf btbn-ffmpeg.tar.xz -C /usr/lib/ffmpeg/5.0 --strip-components 1
     rm -rf btbn-ffmpeg.tar.xz /usr/lib/ffmpeg/5.0/doc /usr/lib/ffmpeg/5.0/bin/ffplay
-    wget -qO btbn-ffmpeg.tar.xz "https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2024-09-19-12-51/ffmpeg-n7.0.2-18-g3e6cec1286-linuxarm64-gpl-7.0.tar.xz"
+    wget -qO btbn-ffmpeg.tar.xz "https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2024-09-30-15-36/ffmpeg-n7.1-linuxarm64-gpl-7.1.tar.xz"
     tar -xf btbn-ffmpeg.tar.xz -C /usr/lib/ffmpeg/7.0 --strip-components 1
     rm -rf btbn-ffmpeg.tar.xz /usr/lib/ffmpeg/7.0/doc /usr/lib/ffmpeg/7.0/bin/ffplay
 fi

frigate/video.py

@@ -94,6 +94,7 @@ def capture_frames(
     ffmpeg_process,
     config: CameraConfig,
     shm_frame_count: int,
+    shm_frames: list[str],
     frame_shape,
     frame_manager: FrameManager,
     frame_queue,
@@ -108,8 +109,6 @@ def capture_frames(
     skipped_eps = EventsPerSecond()
     skipped_eps.start()
 
-    shm_frames: list[str] = []
-
     while True:
         fps.value = frame_rate.eps()
         skipped_fps.value = skipped_eps.eps()
@@ -154,10 +153,6 @@ def capture_frames(
             # if the queue is full, skip this frame
             skipped_eps.update()
 
-    # clear out frames
-    for frame in shm_frames:
-        frame_manager.delete(frame)
-
 
 class CameraWatchdog(threading.Thread):
     def __init__(
@@ -176,6 +171,7 @@ class CameraWatchdog(threading.Thread):
         self.camera_name = camera_name
         self.config = config
         self.shm_frame_count = shm_frame_count
+        self.shm_frames: list[str] = []
         self.capture_thread = None
         self.ffmpeg_detect_process = None
         self.logpipe = LogPipe(f"ffmpeg.{self.camera_name}.detect")
@@ -308,6 +304,7 @@ class CameraWatchdog(threading.Thread):
         self.capture_thread = CameraCapture(
             self.config,
             self.shm_frame_count,
+            self.shm_frames,
             self.ffmpeg_detect_process,
             self.frame_shape,
             self.frame_queue,
@@ -348,6 +345,7 @@ class CameraCapture(threading.Thread):
         self,
         config: CameraConfig,
         shm_frame_count: int,
+        shm_frames: list[str],
         ffmpeg_process,
         frame_shape,
         frame_queue,
@@ -359,6 +357,7 @@ class CameraCapture(threading.Thread):
         self.name = f"capture:{config.name}"
         self.config = config
         self.shm_frame_count = shm_frame_count
+        self.shm_frames = shm_frames
         self.frame_shape = frame_shape
         self.frame_queue = frame_queue
         self.fps = fps
@@ -374,6 +373,7 @@ class CameraCapture(threading.Thread):
             self.ffmpeg_process,
             self.config,
             self.shm_frame_count,
+            self.shm_frames,
             self.frame_shape,
             self.frame_manager,
             self.frame_queue,