fdo#82994: added missing media extensions

Change-Id: Ibbce02b43192fd3afb4984f5f38251a518d7be06
Reviewed-on: https://gerrit.libreoffice.org/11172Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>

avmedia/source/viewer/mediawindow.cxx

@@ -201,17 +201,22 @@ void MediaWindow::getMediaFilters( FilterNameVector& rFilterNameVector )
 {
     static const char* pFilters[] = { "Advanced Audio Coding", "aac",
                                       "AIF Audio", "aif;aiff",
+                                      "Advanced Systems", "asf",
                                       "AU Audio", "au",
+                                      "Audio Codec", "ac3",
                                       "AVI", "avi",
                                       "CD Audio", "cda",
+                                      "Digital Video", "dv",
                                       "FLAC Audio", "flac",
                                       "Flash Video", "flv",
                                       "Matroska Media", "mkv",
                                       "MIDI Audio", "mid;midi",
-                                      "MPEG Audio", "mp2;mp3;mpa",
+                                      "MPEG Audio", "mp2;mp3;mpa;m4a",
                                       "MPEG Video", "mpg;mpeg;mpv;mp4;m4v",
                                       "Ogg Audio", "ogg;oga",
                                       "Ogg Video", "ogv;ogx",
+                                      "Real Audio", "ra",
+                                      "Real Media", "rm",
                                       "RMI MIDI Audio", "rmi",
                                       "SND (SouND) Audio", "snd",
                                       "Quicktime Video", "mov",