metachannels: force the use of the ffmpeg demuxer for mp4 (extension .m4v here).

(cherry picked from commit 11f64a07)
Signed-off-by: Rémi Duraffort <ivoire@videolan.org>

share/lua/playlist/metachannels.lua

@@ -28,6 +28,8 @@ end
 
 function parse()
     local webpage = ''
+    local options
+
     while true do
         local line = vlc.readline()
         if line == nil then break end
@@ -43,10 +45,12 @@ function parse()
         if( item.name == 'item' ) then
             simplexml.add_name_maps( item )
             local url = string.gsub( item.children_map['link'][1].children[1], '&', '&' )
+            if( string.match( url, '%.m4v' ) ) then options = { ':play-and-pause', ':demux=avformat,ffmpeg' }
+                                               else options = { ':play-and-pause' } end
             table.insert( tracks, { path = url,
                                     title = item.children_map['title'][1].children[1],
                                     arturl = item.children_map['media:thumbnail'][1].attributes['url'],
-                                    options = {':play-and-pause'} } )
+                                    options = options } )
         end
     end