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-rw-r--r--libavcodec/vc1.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index fb33e6ffb5..f8d3162efb 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -293,6 +293,7 @@ int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitCo
v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;
return decode_sequence_header_adv(v, gb);
} else {
+ v->chromaformat = 1;
v->zz_8x4 = ff_wmv2_scantableA;
v->zz_4x8 = ff_wmv2_scantableB;
v->res_y411 = get_bits1(gb);