From 95df925de764d2a074a9937a5eb0b8c034ac3cbd Mon Sep 17 00:00:00 2001
From: PickleRick <davidecavagnola@gmail.com>
Date: Sat, 19 Sep 2026 17:28:16 +0200
Subject: [PATCH] fix: update x265 parameters for improved encoding efficiency
 in 2-pass process

---
 LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js b/LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js
index bb9fad4..1b92500 100644
--- a/LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js
+++ b/LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js
@@ -145,6 +145,8 @@ const plugin = async (args) => {
   const x265ParamsBase = [
     `keyint=${gopKeyint}`,
     `min-keyint=${gopMinKeyint}`,
+    `scenecut=0`,
+    `open-gop=0`,
     `vbv-maxrate=${maxRateNum}`,
     `vbv-bufsize=${bufSizeNum}`,
     `stats=${statsForX265}`,
@@ -170,7 +172,7 @@ const plugin = async (args) => {
       '-y',
       '-i', inputFile,
       ...videoArgs,
-      '-x265-params', `${x265ParamsBase}:pass=1`,
+      '-x265-params', `no-slow-firstpass=1:pass=1:${x265ParamsBase}`,
       '-an', '-sn',
       '-f', 'null',
       nullDev,
@@ -204,7 +206,7 @@ const plugin = async (args) => {
       ...audioArgs,
       '-map_chapters', '0',
       ...videoArgs,
-      '-x265-params', `${x265ParamsBase}:pass=2`,
+      '-x265-params', `pass=2:${x265ParamsBase}`,
       '-sn',
       outFile,
     ],