Index: libmpdemux/demux_asf.c
===================================================================
--- libmpdemux/demux_asf.c	(revision 29165)
+++ libmpdemux/demux_asf.c	(working copy)
@@ -594,7 +594,7 @@
 */
     switch(cmd) {
 	case DEMUXER_CTRL_GET_TIME_LENGTH:
-	    *((double *)arg)=(double)(asf->movielength);
+	    *((double *)arg)=asf->movielength;
 	    return DEMUXER_CTRL_OK;
 
 	case DEMUXER_CTRL_GET_PERCENT_POS:
Index: libmpdemux/asf.h
===================================================================
--- libmpdemux/asf.h	(revision 29165)
+++ libmpdemux/asf.h	(working copy)
@@ -204,7 +204,7 @@
     int scrambling_b;
     unsigned packetsize;
     double   packetrate;
-    unsigned movielength;
+    double   movielength;
     int asf_is_dvr_ms;
     uint32_t asf_frame_state;
     int asf_frame_start_found;
Index: libmpdemux/asfheader.c
===================================================================
--- libmpdemux/asfheader.c	(revision 29165)
+++ libmpdemux/asfheader.c	(working copy)
@@ -527,7 +527,8 @@
       asf->packetsize=fileh->max_packet_size;
       asf->packet=malloc(asf->packetsize); // !!!
       asf->packetrate=fileh->max_bitrate/8.0/(double)asf->packetsize;
-      asf->movielength=(fileh->play_duration-fileh->preroll)/10000000LL;
+      asf->movielength=(double)fileh->play_duration/10000000 -
+                       (double)fileh->preroll/1000;
   }
 
   // find content header