sorry if I bother, I found your contribution to FFmpeg - SMAF encode/decode. Could you please help me finding correct FFmpeg command for encoding in .mmf format?

I succesfully decoded Yamaha original .mmf to .wav through FFmpeg by using command:

ffmpeg -i input.mmf -ar 8000 output.wav

but for some reason .mmf encoding commands such as:

ffmpeg -i input.wav -ab 64 -ac 1 -f mmf output.mmf
ffmpeg -i input.wav -ab 32 -ac 1 -f mmf output.mmf
ffmpeg -i input.wav -ar 8000 -ab 32 output.mmf
etc., etc.,

create a file which cannot be played in Yamaha MidRadio as original .mmf. Perhaps you know correct encoding command for FFmpeg and input .wav requirments?

Thanks in advance,

Zoran