ffmpeg -y -hide_banner -nostats -f alsa -channels 2 -sample_rate 48000 -i hw:0,1 -osr 48000 -c:a libtwolame -b:a 160k -minrate 160k -maxrate 160k -bufsize 160k -mode stereo -mpegts_transport_stream_id 1 -mpegts_original_network_id 1 -mpegts_service_id 1 -mpegts_service_type digital_radio -pcr_period 20 -metadata service_name="-" -metadata service_provider="-" -mpegts_start_pid 769 -mpegts_pmt_start_pid 257 -muxrate 520k -mpegts_flags 'system_b' -mpegts_flags 'nit' -f tee -map 0 "[f=mpegts]udp://192.168.10.124:1234?pkt_size=1316|[f=mpegts]pipe:1" | cat > /dev/spidev4.0