The VideoLAN Forums

http://www.openh264.org/
I am not sure if I can ask this question here but I wonder if it is possible to replace VLC's decoder with openh264 decoder for h264.

I believe VLC uses ffmpeg to decode h264 bitstream so I think I just need to replace ffmpeg decoder with openh264 decoder.
How should I approaching this problem? Can someone share ideas how to do this?

You'd need to write a new decoder plug-in (as the de265 guys did).

You'd need to write a new decoder plug-in (as the de265 guys did).

https://github.com/strukturag/vlc-libde265
I assume you are referring to this, correct?

Yes.

Please have a look at https://github.com/ASTIM/OpenH264-VLC-Plugin

Please have a look at https://github.com/ASTIM/OpenH264-VLC-Plugin

Nice.