Stream to Vec Decim blks2_stream_to_vector_decimator from gnuradio import blks2 blks2.stream_to_vector_decimator( item_size=$type.size, sample_rate=$sample_rate, vec_rate=$vec_rate, vec_len=$vlen, ) set_sample_rate($sample_rate) set_vec_rate($vec_rate) IO Type type enum Complex complex size:gr.sizeof_gr_complex Float float size:gr.sizeof_float Int int size:gr.sizeof_int Short short size:gr.sizeof_short Byte byte size:gr.sizeof_char Sample Rate sample_rate samp_rate real Vec Rate vec_rate 30 real Vec Length vlen 1024 int $vlen >= 1 in $type out $type $vlen