--- a/src/gallium/state_trackers/vdpau/surface.c
+++ b/src/gallium/state_trackers/vdpau/surface.c
@@ -310,6 +306,7 @@ vlVdpVideoSurfaceGetBitsYCbCr(VdpVideoSurface surface,
    struct pipe_sampler_view **sampler_views;
    enum getbits_conversion conversion = CONVERSION_NONE;
    unsigned i, j;
+   static int dumped = 0;
 
    vlsurface = vlGetDataHTAB(surface);
    if (!vlsurface)
@@ -374,6 +371,18 @@ vlVdpVideoSurfaceGetBitsYCbCr(VdpVideoSurface surface,
             return VDP_STATUS_RESOURCES;
          }
 
+         if (!dumped) {
+            FILE *fp;
+            char fn[255];
+
+            sprintf(fn, "sv%d-texture%d", i, j);
+            fp = fopen(fn, "wb");
+            if (!fp)
+               abort();
+            fwrite(map, 1, box.width*box.height,fp);
+            fclose(fp);
+         }
+
          if (conversion == CONVERSION_NV12_TO_YV12 && i == 1) {
 #if 0
             util_copy_rect(destination_data[i] + destination_pitches[i] * j, sv->texture->format,
@@ -403,6 +412,9 @@ vlVdpVideoSurfaceGetBitsYCbCr(VdpVideoSurface surface,
    }
    pipe_mutex_unlock(vlsurface->device->mutex);
 
+   if (!dumped)
+      dumped = 1;
+
    return VDP_STATUS_OK;
 }