bootlab-tx

#!/usr/bin/env python3

#
# usage: bootlab-tx channel:password
#

import subprocess
import sys, time

# Check args
if len(sys.argv) < 2 or not ':' in sys.argv[1]:
    print('usage: bootlab-tx channel:password')
    sys.stdout.flush()
    exit(1)
channel, password = sys.argv[1].split(':')

# Prepare URL
icecast = 'icecast://source:'+password+'@boot.telemir.fr:8000/'+channel

while True:

    # Detect USB audio HW
    hw = 'none'
    card = subprocess.run('arecord -l | grep USB | awk \'{print $2}\'', shell=True,  stdout=subprocess.PIPE).stdout.decode('utf-8').strip()
    if card:
        hw = card.replace(':', ',')+'0'

        # Detect channels
        ichan = 2 
        while True:
            test = subprocess.run('arecord -d 1 -f cd -D hw:'+hw+' /zz/foobar.wav -c '+str(ichan), shell=True,  stdout=subprocess.PIPE, stderr=subprocess.PIPE).stderr.decode('utf-8').strip()
            if not 'Channels count non available' in test or ichan == 1:
                break 
            ichan -= 1
        print('USB soundcard detected with '+str(ichan)+' channels')
        sys.stdout.flush()
            
        # Make CMD
        command = 'ffmpeg -ac '+str(ichan)+' -f alsa -i hw:'+hw+' -c:a libopus -vbr on -b:a 256k -ac 2 -vn -content_type application/ogg -f ogg '+icecast+' 2>/tmp/bootlab-tx.log'
        print('FFMPEG cmd: '+command)
        print('FFMPEG log: tail -f /tmp/bootlab-tx.log')
        sys.stdout.flush()

        try:
            ffmpeg = subprocess.Popen(command, shell=True,  stdout=subprocess.PIPE)
            ffmpeg.wait()
        except:
            e = sys.exc_info()[0]
            print(e)
            sys.stdout.flush()

    else:
        print('No USB audio detected...')
        sys.stdout.flush()

    time.sleep(0.5)
    subprocess.run('pkill ffmpeg', shell=True,  stdout=subprocess.PIPE)




# ffmpeg -ac 2 -f alsa -i hw:1,0 -acodec libopus -ab 256k -ac 2 -content_type application/ogg -f ogg icecast://source:bootlab37*@boot.telemir.fr:8000/bootleg