Is it possible to change frames per packets?

[OnkelTem]

I might be wrong but in my tests prims.opus.Encoder generates stream with only 1 frame per packet.
I tried rates of 48000/20 and 16000/60 and different bitrates.
In all the cases I received a stream with only one frame per packet.
I also reviewed the list of Encoder.set* methods and didn't find there anything related.
Can we control this parameter or not?