fix: update x265 parameters for improved encoding efficiency in 2-pass process

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,
     ],