Index: command.c
===================================================================
--- command.c	(revision 22721)
+++ command.c	(working copy)
@@ -2120,7 +2120,7 @@
 
 	case MP_CMD_SCREENSHOT:
 	    if (vo_config_count) {
-		mp_msg(MSGT_CPLAYER, MSGL_INFO, "sending VFCTRL_SCREENSHOT!\n");
+		mp_msg(MSGT_CPLAYER, MSGL_INFO, "sending VFCTRL_SCREENSHOT! (THIS REQUIRES -vf screenshot)\n");
 		if (CONTROL_OK !=
 		    ((vf_instance_t *) sh_video->vfilter)->
 		    control(sh_video->vfilter, VFCTRL_SCREENSHOT,