From: Andriy Gelman Date: Thu, 13 Dec 2018 04:57:35 +0000 (-0500) Subject: avcodec/mpeg: Initialize quarter_sample parameter from previous thread. X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=5282db5929f25ca9566a47ad217794842b364afc;p=ffmpeg 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 --- diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index d4d3bea6498..dbb6ab9b393 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;