Index: libmpdemux/demuxer.c
===================================================================
RCS file: /cvsroot/mplayer/main/libmpdemux/demuxer.c,v
retrieving revision 1.207
diff -u -r1.207 demuxer.c
--- libmpdemux/demuxer.c	23 Sep 2005 22:35:03 -0000	1.207
+++ libmpdemux/demuxer.c	2 Oct 2005 02:45:22 -0000
@@ -943,7 +943,19 @@
 int demuxer_get_percent_pos(demuxer_t *demuxer){     
     int ans = 0;
     int res = demux_control(demuxer, DEMUXER_CTRL_GET_PERCENT_POS, &ans);
-    int len = (demuxer->movi_end - demuxer->movi_start) / 100;
+    int len;
+    off_t save_pos = lseek(demuxer->stream->fd, 0, SEEK_CUR);
+    off_t end_of_file;
+                                                                                
+    // If we're reading from a file, get its present length by seeking 
+    // to its end and seeking back to current position.
+    if (save_pos > 0) {
+      end_of_file = lseek(demuxer->stream->fd, 0, SEEK_END);
+      lseek(demuxer->stream->fd, save_pos, SEEK_SET);
+      demuxer->movi_end = end_of_file;
+    }
+
+    len = (demuxer->movi_end - demuxer->movi_start) / 100;
     if (res <= 0) {
       if (len > 0)
       ans = (demuxer->filepos - demuxer->movi_start) / len;