diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 07e61efb05..718b12832c 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -992,13 +992,19 @@ static av_cold void common_init(H264Context *h){
     s->height = s->avctx->height;
     s->codec_id= s->avctx->codec->id;
 
-    ff_h264dsp_init(&h->h264dsp, 8, 1);
-    ff_h264_pred_init(&h->hpc, s->codec_id, 8, 1);
+    s->avctx->bits_per_raw_sample = 8;
+    h->cur_chroma_format_idc = 1;
+
+    ff_h264dsp_init(&h->h264dsp,
+                    s->avctx->bits_per_raw_sample, h->cur_chroma_format_idc);
+    ff_h264_pred_init(&h->hpc, s->codec_id,
+                      s->avctx->bits_per_raw_sample, h->cur_chroma_format_idc);
 
     h->dequant_coeff_pps= -1;
     s->unrestricted_mv=1;
     s->decode=1; //FIXME
 
+    s->dsp.dct_bits = 16;
     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
 
     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));