Remove ffmpeg banner (#6600)

* Hide banner in maintainer

* Hide banner in event download

frigate/http.py

@@ -1347,6 +1347,7 @@ def recording_clip(camera_name, start_ts, end_ts):
     if not os.path.exists(path):
         ffmpeg_cmd = [
             "ffmpeg",
+            "-hide_banner",
             "-y",
             "-protocol_whitelist",
             "pipe,file",

frigate/record/maintainer.py

@@ -296,6 +296,7 @@ class RecordingMaintainer(threading.Thread):
                 # add faststart to kept segments to improve metadata reading
                 ffmpeg_cmd = [
                     "ffmpeg",
+                    "-hide_banner",
                     "-y",
                     "-i",
                     cache_path,