diff -Naur -wbBE -X ignore_list main-cvs/libmpcodecs/vd_ffmpeg.c main-devel/libmpcodecs/vd_ffmpeg.c
--- main-cvs/libmpcodecs/vd_ffmpeg.c	2005-04-25 09:01:06.000000000 +0800
+++ main-devel/libmpcodecs/vd_ffmpeg.c	2005-05-23 17:24:27.000000000 +0800
@@ -12,6 +12,7 @@
 #include "bswap.h"
 
 #include "vd_internal.h"
+#include "vf.h"
 
 static vd_info_t info = {
 	"FFmpeg's libavcodec codec family",
@@ -482,6 +483,23 @@
 	    sh->aspect = ctx->last_aspect;
 	sh->disp_w = avctx->width;
 	sh->disp_h = avctx->height;
+
+        // For H.263 videos, output size can be different to display size,
+        // so we insert a crop filter to force output dimension
+        if (sh->bih && sh->format == mmioFOURCC('h','2','6','3') &&
+            (sh->bih->biWidth != sh->disp_w ||
+             sh->bih->biHeight != sh->disp_h))
+        {
+            char w_str[30];
+            char h_str[30];
+            char* args[] = {"w", w_str, "h", h_str, "x", "0", "y", "0", NULL};
+            sprintf(w_str, "%d", sh->bih->biWidth);
+            sprintf(h_str, "%d", sh->bih->biHeight);
+            sh->vfilter = vf_open_filter(sh->vfilter, "crop", args);
+            mp_msg(MSGT_DECVIDEO, MSGL_V,
+                "[ffmpeg] auto-inserting crop filter\n");
+        }
+
 	ctx->vo_inited=1;
 	switch(pix_fmt){
 	// YUVJ are YUV formats that use the full Y range and not just