Index: libmpcodecs/vf_screenshot.c
===================================================================
--- libmpcodecs/vf_screenshot.c	(revision 35204)
+++ libmpcodecs/vf_screenshot.c	(working copy)
@@ -168,7 +168,13 @@
       return;
     vf->dmpi= vf_get_image(vf->next, mpi->imgfmt,
                            mpi->type, mpi->flags/* | MP_IMGFLAG_READABLE*/, mpi->width, mpi->height);
-
+    if (vf->dmpi == NULL) {
+        // what now?
+        mpi->planes[0] = NULL;
+        mpi->stride[0] = NULL;
+        mpi->priv = NULL;
+        return;
+    }
     mpi->planes[0]=vf->dmpi->planes[0];
     mpi->stride[0]=vf->dmpi->stride[0];
     if(mpi->flags&MP_IMGFLAG_PLANAR){