The same is done already for qdelta.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: [email protected]
---
 libavcodec/ivi_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/ivi_common.c b/libavcodec/ivi_common.c
index 39e9f92..4eee19b 100644
--- a/libavcodec/ivi_common.c
+++ b/libavcodec/ivi_common.c
@@ -603,7 +603,7 @@ static int ivi_process_empty_tile(AVCodecContext *avctx, 
IVIBandDesc *band,
             if (band->inherit_qdelta && ref_mb)
                 mb->q_delta = ref_mb->q_delta;
 
-            if (band->inherit_mv) {
+            if (band->inherit_mv && ref_mb) {
                 /* motion vector inheritance */
                 if (mv_scale) {
                     mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
-- 
1.8.2.1

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