Index: libmpcodecs/vd_ffmpeg.c
===================================================================
--- libmpcodecs/vd_ffmpeg.c	(Revision 22255)
+++ libmpcodecs/vd_ffmpeg.c	(Arbeitskopie)
@@ -498,7 +498,7 @@
     
      // it is possible another vo buffers to be used after vo config()
      // lavc reset its buffers on width/heigh change but not on aspect change!!!
-    if (// aspect != ctx->last_aspect ||
+    if ( rint(10*aspect) != rint(10*ctx->last_aspect) ||
 	width != sh->disp_w  ||
 	height != sh->disp_h ||
 	pix_fmt != ctx->pix_fmt ||
@@ -507,7 +507,7 @@
 	mp_msg(MSGT_DECVIDEO, MSGL_V, "[ffmpeg] aspect_ratio: %f\n", aspect);
         ctx->last_aspect = aspect;
 //	if(ctx->last_aspect>=0.01 && ctx->last_aspect<100)
-	if(sh->aspect==0.0)
+//	if(sh->aspect==0.0)
 	    sh->aspect = ctx->last_aspect;
 	sh->disp_w = width;
 	sh->disp_h = height;