# Unicast streaming with VLC

Introduction

VideoLAN Streaming Howto

Send an audio stream to two unicast IP addresses

video_server# cvlc -vvv audio.mp3 --sout '#duplicate{
dst=rtp{mux=ts,dst=192.168.0.1,port=2001},
dst=rtp{mux=ts,dst=192.168.0.2,port=2002}
}'

client_1# cvlc -vvv rtp://@:2001

client_2# cvlc -vvv rtp://@:2002

Send an audio stream transcoded to MPEG, 16kbps, 8kHz and mono

video_server# cvlc -vvv audio.mp3 --sout '#transcode{
acodec=mpga,ab=16,channels=1,samplerate=8000
}:
duplicate{
dst=rtp{mux=ts,dst=192.168.0.1,port=2001},
dst=rtp{mux=ts,dst=192.168.0.2,port=2002}
}'

Bitrate calculation

bitrate = bits/second (bps)
samplerate = samples/seconds (Hz)
bit_resolution = bits/sample
channels = 1 (mono), 2 (stereo)

bitrate = samplerate * bit_resolution * channels

For example:

16kbps = 8kHz * 2b * 1