--- main/libmpdemux/demux_audio.c	2005-04-18 16:51:34.000000000 -0400
+++ main/libmpdemux/demux_audio.c	2005-07-27 20:03:00.000000000 -0400
@@ -415,7 +415,15 @@
     l = 65535;
     dp = new_demux_packet(l);
     l = stream_read(s,dp->buffer,l);
-    priv->last_pts = priv->last_pts < 0 ? 0 : priv->last_pts + l/(float)sh_audio->i_bps;
+    switch (sh_audio->i_bps)
+    {
+    case 0:
+      priv->last_pts = 0;
+      break;
+    default:
+      priv->last_pts = priv->last_pts < 0 ? 0 : priv->last_pts + l/(float)sh_audio->i_bps;
+      break;
+    }
     break;
   }
   default:
@@ -424,8 +432,16 @@
   }
 
   resize_demux_packet(dp, l);
-  ds->pts = priv->last_pts - (ds_tell_pts(demux->audio) -
-              sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
+  switch (sh_audio->i_bps)
+  {
+  case 0:
+    ds->pts = 0;
+    break;
+  default:
+    ds->pts = priv->last_pts - (ds_tell_pts(demux->audio) -
+                sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
+    break;
+  }
   ds_add_packet(ds, dp);
   return 1;
 }