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625KB MD5: C52EAAEAC6296960CD5849D076615159
This is actually x265GuiEx, but among the source code, rigaya has already made comments using the term “x26X” in multiple places. Since this plugin is already a combo GUI for x264 and x265, it is a matter of time to be renamed to “x26XGuiEx”.
This plugin is usable on XP, but requires .NET 4 Framework and VC2013 redistributable.
The extra pack already included VC2013 DLLs since v1.4 (if something is still missing, please install VC2012, VC2013 redistributables)
To switch between x265 and x264 mode, click the [x265] button on the top: