Bug Fixes (#14193)

* fix getting device from empty list

* Overwrite all fields

* Fix header too low

frigate/ffmpeg_presets.py

@@ -31,6 +31,9 @@ class LibvaGpuSelector:
 
         devices = list(filter(lambda d: d.startswith("render"), os.listdir("/dev/dri")))
 
+        if not devices:
+            return "/dev/dri/renderD128"
+
         if len(devices) < 2:
             self._selected_gpu = f"/dev/dri/{devices[0]}"
             return self._selected_gpu