---
libavcodec/utils.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index f2dd357..aa701ba 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1493,6 +1493,17 @@ int attribute_align_arg
avcodec_decode_video2(AVCodecContext *avctx, AVFrame *pi
return err;
}
+ if (avctx->field_order == AV_FIELD_UNKNOWN) {
+ if (picture->field_state == AV_FRAME_PROGRESSIVE)
+ avctx->field_order = AV_FIELD_PROGRESSIVE;
+ else if (picture->field_state == AV_FRAME_INTERLACED_TFF)
+ avctx->field_order = AV_FIELD_TT;
+ else if (picture->field_state == AV_FRAME_INTERLACED_BFF)
+ avctx->field_order = AV_FIELD_BB;
+ else
+ av_log(avctx, AV_LOG_WARNING, "Decoder didn't initialize
field_state correctly.\n");
+ }
+
avctx->frame_number++;
} else
av_frame_unref(picture);
--
1.7.9.5
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