--- branches/dev-api-3/vfw/src/2pass.c	2002/11/28 07:27:37	686
+++ branches/dev-api-3/vfw/src/2pass.c	2002/11/28 07:43:16	687
@@ -660,8 +660,19 @@
 				break;
 			}
 
-			twopass->average_bframe = (double)bframe_total / bframes / twopass->movie_curve;
-			twopass->average_pframe = (double)pframe_total / pframes / twopass->movie_curve;
+			if (bframes)
+				twopass->average_bframe = (double)bframe_total / bframes / twopass->movie_curve;
+
+			if (pframes)
+				twopass->average_pframe = (double)pframe_total / pframes / twopass->movie_curve;
+			else
+				if (bframes)
+					twopass->average_pframe = twopass->average_bframe;  // b-frame packed bitstream fix
+				else
+				{
+					DEBUGERR("ERROR:  No p-frames or b-frames were present in the 1st pass.  Rate control cannot function properly!");
+					return ICERR_ERROR;
+				}