FFMPEG CODEC cannot be opened because developer is not verified

Hello everyone,
I wanted to import an mp4 file to Audacity, therefore I downloaded the fmpeg plugin to convert it into a valid format, but the installation recommended (lame.buanzo.org) is not recongnized by my computer, the message I get is ““ffmpeg_codecs.55.64bit.dylib” cannot be opened because the developer cannot be verified. macOS cannot verify this app is free from malware,” is there any other developer doing plugins to be able to import more audio formats? I have a MacOS 12.21 Monterrey; Thank you,

For more insight into this issue, do a google search on “cannot be opened because the developer cannot be verified. macOS cannot verify this app is free from malware”.

I have not seen any malware issues posted regarding “ffmpeg_codecs.55.64bit.dylib”

If you choose not to install ffmpeg for Audacity, you can still convert audio files using other 3rd party tools such as VLC.

You may already have software on your machine that can do the required conversion. Search for “macOS convert mp4 to wav”.

Note that Audacity is an audio editor, not an audio converter.