1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index f039d722e7..818e8d3c0d 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -873,7 +873,7 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
         fcm = PROGRESSIVE;
     }
     if (!v->first_pic_header_flag && v->field_mode != field_mode)
-        return -1;
+        return AVERROR_INVALIDDATA;
     v->field_mode = field_mode;
     v->fcm = fcm;