From 5b2bfb2fed03274bd0bc2007c66118ca33c9f1ca Mon Sep 17 00:00:00 2001 From: Sergey Sharybin Date: Wed, 19 Aug 2020 15:39:00 +0200 Subject: FFmpeg: Improve multi-threading settings Allow use all system threads for frame encoding/decoding. This is very straightforward: the value of zero basically disables threading. Change threading policy to slice when decoding frames. The reason for this is because decoding happens frame-by-frame, so inter-frame threading policy will not bring any speedup. The change for threading policy to slice is less obvious and is based on benchmark of the demo files from T78986. This gives best performance so far. Rendering the following file went down from 190sec down to 160sec. https://storage.googleapis.com/institute-storage/vse_simplified_example.zip This change makes both reading and writing faster. The animation render is just easiest to get actual time metrics. Differential Revision: https://developer.blender.org/D8627 --- source/blender/imbuf/intern/anim_movie.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'source/blender/imbuf/intern/anim_movie.c') diff --git a/source/blender/imbuf/intern/anim_movie.c b/source/blender/imbuf/intern/anim_movie.c index 3a7570cd320..28bf26aa343 100644 --- a/source/blender/imbuf/intern/anim_movie.c +++ b/source/blender/imbuf/intern/anim_movie.c @@ -55,6 +55,7 @@ #include "BLI_path_util.h" #include "BLI_string.h" +#include "BLI_threads.h" #include "BLI_utildefines.h" #include "MEM_guardedalloc.h" @@ -573,6 +574,9 @@ static int startffmpeg(struct anim *anim) pCodecCtx->workaround_bugs = 1; + pCodecCtx->thread_count = BLI_system_thread_count(); + pCodecCtx->thread_type = FF_THREAD_SLICE; + if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0) { avformat_close_input(&pFormatCtx); return -1; -- cgit v1.2.3