Interlaced field pictures can have one or two reference pictures, signaled
by NUMREF syntax element. For single reference pictures, reference picture
is determined by REFFIELD syntax element.
---
libavcodec/vc1dec.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 3e73a1c..5f709ed 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -794,6 +794,7 @@ static void vc1_mc_4mv_chroma(VC1Context *v, int dir)
/* calculate chroma MV vector from four luma MVs */
if (!v->field_mode || (v->field_mode && !v->numref)) {
valid_count = get_chroma_mv(mvx, mvy, intra, 0, &tx, &ty);
+ chroma_ref_type = v->reffield;
if (!valid_count) {
s->current_picture.f.motion_val[1][s->block_index[0] +
v->blocks_off][0] = 0;
s->current_picture.f.motion_val[1][s->block_index[0] +
v->blocks_off][1] = 0;
--
1.7.4
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