* lisp/emms-stream-info.el: Remove preference and document.

Removes the built-in preference for mplayer, but also clearly documents
how one would go about choosing either mplayer or vlc to query the
streams.

2 files changed, 24 insertions, 5 deletions

diff --git a/doc/emms.texinfo b/doc/emms.texinfo
index 457a2d3..60a8957 100644
--- a/doc/emms.texinfo
+++ b/doc/emms.texinfo
@@ -2288,9 +2288,28 @@ invoking:
 (require 'emms-streams)
 @end lisp
 
-The Emms interface for streaming audio is enabled by default in the
-`emms-all' setup level. For more information about Emms setup levels
-see @xref{Setup}.
+Querying the streams for track information is provided by the
+@file{emms-stream-info.el} package and can be loaded with:
+
+@lisp
+(require 'emms-stream-info)
+@end lisp
+
+The Emms interface for streaming audio, and the stream query
+capabilites are enabled by default in the `emms-all' setup level. For
+more information about Emms setup levels see @xref{Setup}.
+
+`emms-stream-info' calls a backend program to query the stream for
+information. The preferred program needs to be specified by setting
+the variable @var{emms-stream-info-backend} either `mplayer' or
+`vlc'. For instance:
+
+@lisp
+(setq emms-stream-info-backend 'vlc)
+@end lisp
+
+Obviously, the corresponding program needs to be installed and
+available for Emms to invoke.
 
 Enter the emms-streams interface by invoking @kbd{M-x}
 @command{emms-streams}. The emms-streams interface comes with a
diff --git a/lisp/emms-stream-info.el b/lisp/emms-stream-info.el
index 667e3ce..4bf7eeb 100644
--- a/lisp/emms-stream-info.el
+++ b/lisp/emms-stream-info.el
@@ -44,7 +44,7 @@
 
 ;;; Code:
 
-(defvar emms-stream-info-backend 'mplayer
+(defvar emms-stream-info-backend nil
   "Symbol designating the backend program to use.")
 
 ;; using unhygienic macros for good... or is it evil?
@@ -82,7 +82,7 @@
 	(bitrate "N/A")
 	(nowplaying "N/A"))
     (with-temp-buffer
-      (message "querying stream...")
+      (message "querying stream with %s backend..." emms-stream-info-backend)
       (cond
        ((eq emms-stream-info-backend 'mplayer)
 	(emms-stream-info-mplayer-backend url)