---
 libavcodec/h264_slice.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 80d27e5..9477650 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -1417,7 +1417,8 @@ int ff_h264_decode_slice_header(H264Context *h, 
H264Context *h0)
                      || h->mb_width  != h->sps.mb_width
                      || h->mb_height != h->sps.mb_height * (2 - 
h->sps.frame_mbs_only_flag)
                     ));
-    if (non_j_pixfmt(h0->avctx->pix_fmt) != non_j_pixfmt(get_pixel_format(h0, 
0)))
+    if (h0->avctx->pix_fmt == AV_PIX_FMT_NONE
+        || (non_j_pixfmt(h0->avctx->pix_fmt) != 
non_j_pixfmt(get_pixel_format(h0, 0))))
         must_reinit = 1;
 
     if (first_slice && av_cmp_q(h->sps.sar, h->avctx->sample_aspect_ratio))
-- 
2.1.0

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