Cannot set installed Ffmpeg as converter

[ditusade]

Hi,
I installed ffmpeg for another audio program which works fine for its purpose. The executable sits at /usr/local/bin/ffmpeg.
Minimstreamer converter would not accept this path. I also copied ffmpeg to /opt/bin but no joy. I also changed the filename permissions to be accessible to everyone again nothing.
In ssh, i can run ffmpeg from anywhere. Any other thing I can try please.

I don't want to install another ffmpeg as my other audio program doesn't like it.
My system - Raspberry Pi 5 running Ubuntu 24.04 (RT Kernel) .

Thanks
Dave