Index: MPlayer-r33333/libmpcodecs/vd_theora.c
===================================================================
--- MPlayer-r33333.orig/libmpcodecs/vd_theora.c	2011-05-01 10:23:23.000000000 +0200
+++ MPlayer-r33333/libmpcodecs/vd_theora.c	2011-05-01 14:09:52.000000000 +0200
@@ -133,7 +133,7 @@
     mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Theora video init ok!\n");
     mp_msg(MSGT_DECVIDEO,MSGL_INFO,"Frame: %dx%d, Picture %dx%d, Offset [%d,%d]\n", context->inf.width, context->inf.height, context->inf.frame_width, context->inf.frame_height, context->inf.offset_x, context->inf.offset_y);
 
-    return mpcodecs_config_vo (sh,context->inf.width,context->inf.height,theora_pixelformat2imgfmt(context->inf.pixelformat));
+    return mpcodecs_config_vo (sh,context->inf.frame_width,context->inf.frame_height,theora_pixelformat2imgfmt(context->inf.pixelformat));
 
 err_out:
     free(context);
@@ -196,11 +196,17 @@
     mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0, yuv.y_width, yuv.y_height);
     if(!mpi) return NULL;
 
-    mpi->planes[0]=yuv.y;
+    int y_offs = context->inf.offset_x + context->inf.offset_y*yuv.y_stride;
+    int uv_h_sampling = mpi->width / mpi->chroma_width;
+    int uv_v_sampling = mpi->height / mpi->chroma_height;
+    int uv_offs = context->inf.offset_x/uv_h_sampling 
+       + context->inf.offset_y/uv_v_sampling * yuv.uv_stride;
+
+    mpi->planes[0]=yuv.y + y_offs;
     mpi->stride[0]=yuv.y_stride;
-    mpi->planes[1]=yuv.u;
+    mpi->planes[1]=yuv.u + uv_offs;
     mpi->stride[1]=yuv.uv_stride;
-    mpi->planes[2]=yuv.v;
+    mpi->planes[2]=yuv.v + uv_offs;
     mpi->stride[2]=yuv.uv_stride;
 
     return mpi;