41 lines
1.5 KiB
Plaintext
41 lines
1.5 KiB
Plaintext
#!/usr/bin/liquidsoap
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# Example liquidsoap streaming from op25 to icecast
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# (c) 2019-2021 gnorbury@bondcar.com, wllmbecks@gmail.com
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#
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set("log.stdout", true)
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set("log.file", false)
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set("log.level", 1)
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# Make the native sample rate compatible with op25
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set("frame.audio.samplerate", 8000)
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input = mksafe(input.external(buffer=0.25, channels=2, samplerate=8000, restart_on_error=false, "./audio.py -x 2.5 -s"))
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# Consider increasing the buffer value on slow systems such as RPi3. e.g. buffer=0.25
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# Longer buffer results in less choppy audio but at the expense of increased latency.
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# OPTIONAL AUDIO SIGNAL PROCESSING BLOCKS
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# Uncomment to enable
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#
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# High pass filter
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#input = filter.iir.butterworth.high(frequency = 200.0, order = 4, input)
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# Low pass filter
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#input = filter.iir.butterworth.low(frequency = 3250.0, order = 4, input)
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# Compression
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input = compress(input, attack = 2.0, gain = 0.0, knee = 13.0, ratio = 2.0, release = 12.3, threshold = -18.0)
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# Normalization
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input = normalize(input, gain_max = 6.0, gain_min = -6.0, target = -16.0, threshold = -65.0)
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# ICECAST STREAMING
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# Uncomment to enable output to an icecast server
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# Change the "host", "password", and "mount" strings appropriately first!
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# For metadata to work properly, the host address given here MUST MATCH the address in op25's meta.json file
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#
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output.icecast(%mp3(bitrate=16, samplerate=22050, stereo=false), description="op25", genre="Public Safety", url="", fallible=false, host="ic2.vpn.cusano.net", port=8000, mount="mountpoint", password="hackme", mean(input)) |