Need a program to add ReplayGain data to .opus and .m4a files. (In bulk)

[NoNameISNoMan]

I downloaded a bunch of videos from YouTube as audio, and my previous player of chose turns out to not truly support .opus, so I got recommended Audacious instead. The problem is, while my previous player (WACUP) had a ReplayGain calculator integrated, Audacious does not, and I can't even use the one on the previous one, as it just chews up the metadata of the .opus files instead of actually doing anything.

And so, I need an external program to calculate ReplayGain for my music.

[yz221]

I use deadbeef.
You can drag-and-drop files into it, ctrl-a to select all files, then right click and use the ReplyGain option in the context menu, which will be applied to all selected files.

[NoNameISNoMan]

Thanks!