Index: libmpcodecs/vd_ffmpeg.c
===================================================================
--- libmpcodecs/vd_ffmpeg.c	(revision 24060)
+++ libmpcodecs/vd_ffmpeg.c	(working copy)
@@ -488,9 +488,9 @@
     height = avctx->height;
 
     // HACK!
-    // if sh->ImageDesc is non-NULL, it means we decode QuickTime(tm) video.
+    // some h263 encoded videos have incorrect dimensions in the picture header
     // use dimensions from BIH to avoid black borders at the right and bottom.
-    if (sh->bih && sh->ImageDesc) {
+    if (sh->bih && sh->format == mmioFOURCC('h','2','6','3')) {
 	width = sh->bih->biWidth>>lavc_param_lowres;
 	height = sh->bih->biHeight>>lavc_param_lowres;
     }