From: Carl Hetherington <cth@carlh.net>
Date: Sun, 28 Feb 2021 20:50:49 +0000 (+0100)
Subject: Enable multi-threaded decoding with FFmpeg (helps with #1887).
X-Git-Tag: v2.15.133~16
X-Git-Url: https://git.carlh.net/gitweb/?a=commitdiff_plain;h=981f76a38547b30e67b94eb1c98308edf65d76ef;hp=f14a834eaa52f10b444995d177c504cc0a5ae0ee;p=dcpomatic.git

Enable multi-threaded decoding with FFmpeg (helps with #1887).
---

diff --git a/src/lib/ffmpeg.cc b/src/lib/ffmpeg.cc
index 0e70d9c6f..f8398763e 100644
--- a/src/lib/ffmpeg.cc
+++ b/src/lib/ffmpeg.cc
@@ -203,6 +203,9 @@ DCPOMATIC_DISABLE_WARNINGS
 	for (uint32_t i = 0; i < _format_context->nb_streams; ++i) {
 		auto context = _format_context->streams[i]->codec;
 
+		context->thread_count = 8;
+		context->thread_type = FF_THREAD_FRAME | FF_THREAD_SLICE;
+
 		AVCodec* codec = avcodec_find_decoder (context->codec_id);
 		if (codec) {