catch all psutil errors

frigate/events.py

@@ -36,9 +36,10 @@ class EventProcessor(threading.Thread):
 
         files_in_use = []
         for process in psutil.process_iter():
-            if process.name() != 'ffmpeg':
-                continue
             try:
+                if process.name() != 'ffmpeg':
+                    continue
+
                 flist = process.open_files()
                 if flist:
                     for nt in flist: