diff -Naur MPlayer-1.0pre5.orig/input/input.c MPlayer-1.0pre5/input/input.c
--- MPlayer-1.0pre5.orig/input/input.c	2004-09-01 17:15:37.000000000 +0200
+++ MPlayer-1.0pre5/input/input.c	2004-09-03 03:12:19.851278928 +0200
@@ -97,6 +97,7 @@
 #ifdef HAS_DVBIN_SUPPORT
   { MP_CMD_DVB_SET_CHANNEL, "dvb_set_channel", 2, { {MP_CMD_ARG_INT,{0}}, {MP_CMD_ARG_INT,{0}}, {-1,{0}}}},
 #endif
+  { MP_CMD_SWITCH_RATIO, "switch_ratio", 0, { {MP_CMD_ARG_FLOAT,{0}}, {-1,{0}} } },
   { MP_CMD_VO_FULLSCREEN, "vo_fullscreen", 0, { {-1,{0}} } },
   { MP_CMD_VO_ONTOP, "vo_ontop", 0, { {-1,{0}} } },
   { MP_CMD_SCREENSHOT, "screenshot", 0, { {-1,{0}} } },
diff -Naur MPlayer-1.0pre5.orig/input/input.h MPlayer-1.0pre5/input/input.h
--- MPlayer-1.0pre5.orig/input/input.h	2004-09-01 17:15:37.000000000 +0200
+++ MPlayer-1.0pre5/input/input.h	2004-09-03 03:11:29.027005392 +0200
@@ -54,6 +54,8 @@
 #define MP_CMD_SUB_FORCED_ONLY 50
 #define MP_CMD_VO_ONTOP 51
 
+#define MP_CMD_SWITCH_RATIO 59
+
 #define MP_CMD_GUI_EVENTS       5000
 #define MP_CMD_GUI_LOADFILE     5001
 #define MP_CMD_GUI_LOADSUBTITLE 5002
diff -Naur MPlayer-1.0pre5.orig/mplayer.c MPlayer-1.0pre5/mplayer.c
--- MPlayer-1.0pre5.orig/mplayer.c	2004-09-01 17:15:36.000000000 +0200
+++ MPlayer-1.0pre5/mplayer.c	2004-09-03 03:13:08.884824696 +0200
@@ -2547,6 +2547,13 @@
       }
       break;
 #endif
+    case MP_CMD_SWITCH_RATIO : {
+      if (cmd->nargs == 0)
+        movie_aspect = (float) sh_video->disp_w / sh_video->disp_h;
+      else
+        movie_aspect = cmd->args[0].v.f;
+      mpcodecs_config_vo (sh_video, sh_video->disp_w, sh_video->disp_h, 0);
+    } break;
     case MP_CMD_AUDIO_DELAY : {
       float v = cmd->args[0].v.f;
       audio_delay += v;