c# opencvSharp4 dll version error

[DongkyuK25]

i'm using opencvSharp4 for recording rtsp video using c#.
i want use videoWriter.Open(filePath + fileName, VideoWriter.FourCC('X', '2', '6', '4'), fps, frameSize);
i can record well when I use openh264-1.8.0-win64.dll.
However When I use openh264-win64.dll after 1.8.0 v,
My videoWriter doesn't work.
please Tell me How to Solve This Problem.
every Condition for recoding is Same.
Only openh264-1.8.0-win64.dll works for recording.
Thank you for your help.