---
avconv.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/avconv.c b/avconv.c
index 8b723e8..978b994 100644
--- a/avconv.c
+++ b/avconv.c
@@ -1755,6 +1755,15 @@ static int transcode_init(void)
if (ost->forced_keyframes)
parse_forced_key_frames(ost->forced_keyframes, ost,
ost->st->codec);
+
+ if (ost->top_field_first == 1)
+ codec->field_order = AV_FIELD_TT;
+ else if (ost->top_field_first == 0)
+ codec->field_order = AV_FIELD_BB;
+
+ if (codec->field_order != AV_FIELD_UNKNOWN &&
+ codec->field_order != AV_FIELD_PROGRESSIVE)
+ codec->flags |= CODEC_FLAG_INTERLACED_DCT |
CODEC_FLAG_INTERLACED_ME;
break;
case AVMEDIA_TYPE_SUBTITLE:
codec->time_base = (AVRational){1, 1000};
--
1.7.9.5
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