Index: libavcodec/h264.c
===================================================================
--- libavcodec/h264.c	(revision 14027)
+++ libavcodec/h264.c	(working copy)
@@ -7113,6 +7113,20 @@
     }
 }
 
+static void print_scaling_matrix(H264Context *h, const uint8_t *cqm, int size, const char *name){
+    int i, j;
+    AVCodecContext *avctx = h->s.avctx;
+    if(!(avctx->debug & FF_DEBUG_BITSTREAM))
+        return;
+    av_log(avctx, AV_LOG_DEBUG, "cqm: %s\n", name);
+    for(i=0; i<size; i++){
+        char buf[40], *p=buf;
+        for(j=0; j<size; j++)
+            p += snprintf(p, buf+40-p, "%2d ", cqm[j+i*size]);
+        av_log(avctx, AV_LOG_DEBUG, "%s\n", buf);
+    }
+}
+
 static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
                                    uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
     MpegEncContext * const s = &h->s;
@@ -7131,9 +7145,15 @@
         decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
         decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
         decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
+        print_scaling_matrix(h, scaling_matrix4[0], 4, "4IY");
+        print_scaling_matrix(h, scaling_matrix4[1], 4, "4IC");
+        print_scaling_matrix(h, scaling_matrix4[3], 4, "4PY");
+        print_scaling_matrix(h, scaling_matrix4[4], 4, "4PC");
         if(is_sps || pps->transform_8x8_mode){
             decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
             decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[1],fallback[3]);  // Inter, Y
+            print_scaling_matrix(h, scaling_matrix8[0], 8, "8IY");
+            print_scaling_matrix(h, scaling_matrix8[1], 8, "8PY");
         }
     } else if(fallback_sps) {
         memcpy(scaling_matrix4, sps->scaling_matrix4, 6*16*sizeof(uint8_t));