diff --git a/moviepy/video/io/ffmpeg_reader.py b/moviepy/video/io/ffmpeg_reader.py
index 30cd26180..c94e0580c 100644
--- a/moviepy/video/io/ffmpeg_reader.py
+++ b/moviepy/video/io/ffmpeg_reader.py
@@ -577,16 +577,16 @@ def parse(self):
 
         # not default audio found, assume first audio stream is the default
         if self.result["audio_found"] and not self.result.get("audio_bitrate"):
+
+            self.result["audio_bitrate"] = None
             for streams_input in self.result["inputs"]:
                 for stream in streams_input["streams"]:
                     if stream["stream_type"] == "audio" and stream.get("bitrate"):
                         self.result["audio_bitrate"] = stream["bitrate"]
                         break
-                if self.result.get("audio_bitrate"):
-                    break
 
-            if "audio_bitrate" not in self.result:
-                self.result["audio_bitrate"] = None
+                if self.result["audio_bitrate"] is not None:
+                    break
 
         result = self.result