ff_init_me() was being called after ff_update_duplicate_context(),
which caused the propagation of the initialization to other thread
contexts to be delayed by one frame.
In the case of mpeg4 (or flipflop_rounding), this would make the
hpel_put functions differ between the first thread (which would be
correctly initialized) and the other threads (which would be stale
from the previous frame).
---
libavcodec/mpegvideo_enc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 2a75973ac4..b601a1a9e4 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -3623,6 +3623,9 @@ static int encode_picture(MpegEncContext *s)
s->q_chroma_intra_matrix16 = s->q_intra_matrix16;
}
+ if(ff_init_me(s)<0)
+ return -1;
+
s->mb_intra=0; //for the rate distortion & bit compare functions
for(i=1; i<context_count; i++){
ret = ff_update_duplicate_context(s->thread_context[i], s);
@@ -3630,9 +3633,6 @@ static int encode_picture(MpegEncContext *s)
return ret;
}
- if(ff_init_me(s)<0)
- return -1;
-
/* Estimate motion for every MB */
if(s->pict_type != AV_PICTURE_TYPE_I){
s->lambda = (s->lambda * s->me_penalty_compensation + 128) >> 8;
--
2.30.2
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