From 5282db5929f25ca9566a47ad217794842b364afc Mon Sep 17 00:00:00 2001 From: Andriy Gelman Date: Wed, 12 Dec 2018 23:57:35 -0500 Subject: [PATCH] avcodec/mpeg: Initialize quarter_sample parameter from previous thread. Fixes #7410. The value of sub-pixel precision for me/mc can change during an Intra frame. In multi-threaded decoding this change is not propagated to other frame threads causing decoding artifacts. This patch initializes the sub-pixel precision parameter from previous thread, which fixes the issue. Signed-off-by: Michael Niedermayer --- libavcodec/mpegvideo.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index d4d3bea..dbb6ab9 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -538,6 +538,8 @@ int ff_mpeg_update_thread_context(AVCodecContext *dst, s->avctx->width = s1->avctx->width; s->avctx->height = s1->avctx->height; + s->quarter_sample = s1->quarter_sample; + s->coded_picture_number = s1->coded_picture_number; s->picture_number = s1->picture_number; -- 1.9.1