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-rw-r--r--libavcodec/vc1dec.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index fa25161d75..7be1c8cbab 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -5711,6 +5711,10 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
av_log(v->s.avctx, AV_LOG_ERROR, "end mb y %d %d invalid\n", s->end_mb_y, s->start_mb_y);
continue;
}
+ if (!v->p_frame_skipped && s->pict_type != AV_PICTURE_TYPE_I && !v->cbpcy_vlc) {
+ av_log(v->s.avctx, AV_LOG_ERROR, "missing cbpcy_vlc\n");
+ continue;
+ }
ff_vc1_decode_blocks(v);
if (i != n_slices)
s->gb = slices[i].gb;