diff --git a/lib/rvideo/inspector.rb b/lib/rvideo/inspector.rb
index a0d0caa..3a35734 100644
--- a/lib/rvideo/inspector.rb
+++ b/lib/rvideo/inspector.rb
@@ -393,6 +393,7 @@ def audio_channels_string
     
     def audio_channels
       return nil unless audio?
+      return audio_match[5].to_i if (audio_match[5].to_i > 0)
 
       case audio_match[5]
       when "mono"
@@ -400,7 +401,7 @@ def audio_channels
       when "stereo"
         2
       else
-        raise RuntimeError, "Unknown number of channels: #{audio_channels}"
+        raise RuntimeError, "Unknown number of channels: #{audio_match[5]}"
       end
     end
     
@@ -523,7 +524,7 @@ def bitrate_match
     def audio_match
       return nil unless valid?
       
-      /Stream\s*(.*?)[,|:|\(|\[].*?\s*Audio:\s*(.*?),\s*([0-9\.]*) (\w*),\s*([a-zA-Z:]*)/.match(audio_stream)
+      /Stream\s*(.*?)[,|:|\(|\[].*?\s*Audio:\s*(.*?),\s*([0-9\.]*) (\w*),\s*([(\d)*a-zA-Z:]*)/.match(audio_stream)
     end
 
     def video_match
@@ -542,4 +543,4 @@ def video_match
       match
     end
   end
-end
\ No newline at end of file
+end