Having read about the the libflite library in man ffmpeg-filters
I am already familiar enough with it to make ffplay
speak in different voices, like so:
ffplay -f lavfi flite=text='Love':voice=kal
ffplay -f lavfi flite=text='Love':voice=slt
How do I list all the voices available in the libflite library?
I've tried
ffmpeg -f lavfi flite=list_voices=1
but I get
Requested output format 'lavfi' is not a suitable output format flite=list_voices=1: Invalid argument