From f029fa483d7ebbf0d3d2bfbb2df42ffb864735ba Mon Sep 17 00:00:00 2001
From: Martin Piatka <piatka@cesnet.cz>
Date: Thu, 3 Mar 2022 16:06:12 +0100
Subject: [PATCH] lavc: x265: Enable constrained intra

This greatly decreases the time needed for decoder to display clear
image after dropped packets.

Open GOP is already implicitly disabled by intra-refresh, disabling it
explicitly just hides the warning.
---
 src/video_compress/libavcodec.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video_compress/libavcodec.cpp b/src/video_compress/libavcodec.cpp
index cc714b74e..a06f77947 100644
--- a/src/video_compress/libavcodec.cpp
+++ b/src/video_compress/libavcodec.cpp
@@ -1740,7 +1740,7 @@ static void configure_x264_x265(AVCodecContext *codec_ctx, struct setparam_param
                 if ("libx264"s == codec_ctx->codec->name || "libx264rgb"s == codec_ctx->codec->name) {
                         ret = av_opt_set(codec_ctx->priv_data, "intra-refresh", "1", 0);
                 } else if ("libx265"s == codec_ctx->codec->name) {
-                        x265_params += ":intra-refresh=1";
+                        x265_params += ":intra-refresh=1:constrained-intra=1:no-open-gop=1";
                         ret = av_opt_set(codec_ctx->priv_data, "x265-params", x265_params.c_str(), 0);
                 }
                 if (ret != 0) {