diff --git a/pydub/utils.py b/pydub/utils.py
index 2694f90..7764b3f 100644
--- a/pydub/utils.py
+++ b/pydub/utils.py
@@ -172,7 +172,7 @@ def get_encoder_name():
     else:
         # should raise exception
         warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)
-        return "ffmpeg"
+        return "@ffmpeg@"


 def get_player_name():
@@ -186,7 +186,7 @@ def get_player_name():
     else:
         # should raise exception
         warn("Couldn't find ffplay or avplay - defaulting to ffplay, but may not work", RuntimeWarning)
-        return "ffplay"
+        return "@ffplay@"


 def get_prober_name():
@@ -200,7 +200,7 @@ def get_prober_name():
     else:
         # should raise exception
         warn("Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work", RuntimeWarning)
-        return "ffprobe"
+        return "@ffprobe@"