I'm trying to add a mux with cvlc instead of ffmpeg.
I've verified this command works

su vlcuser -c 'cvlc --no-audio --no-dbus --satip-host=192.168.8.188 "rtsp://192.168.8.188:554/?alisatid=38&freq=11881&pol=v&msys=dvbs2&mtype=8psk&ro=0.35&plts=on&sr=27500&fec=4&camode=0&vpid=1410&apid=1420&ttxpid=8191&subtpid=0&pmt=1400&prognumber=0014&pids=1410,1420,8191,0,1400&mask"'

But when I add add mux with this I get errors:

2024-12-02 05:57:57.992 mpegts: pipe:///bin/su vlcuser -c 'cvlc --no-audio --no-dbus --satip-host=192.168.8.188 "rtsp://192.168.8.188:554/?alisatid=38&freq=11881&pol=v&msys=dvbs2&mtype=8psk&ro=0.35&plts=on&sr=27500&fec=4&camode=0&vpid=1410&apid=1420&ttxpid=8191&subtpid=0&pmt=1400&prognu - tuning on IPTV #1
2024-12-02 05:57:57.995 subscription: 0001: "scan" subscribing to mux "pipe:///bin/su vlcuser -c 'cvlc --no-audio --no-dbus --satip-host=192.168.8.188 "rtsp://192.168.8.188:554/?alisatid=38&freq=11881&pol=v&msys=dvbs2&mtype=8psk&ro=0.35&plts=on&sr=27500&fec=4&camode=0&vpid=1410&apid=1420&ttxpid=8191&subtpid=0&pmt=1400&prognu", weight: 6, adapter: "IPTV #1", network: "hdhr-iptv", service: "Raw PID Subscription"
2024-12-02 05:57:57.995 spawn: Executing "/bin/su"
2024-12-02 05:58:00.997 spawn: su: incorrect password
2024-12-02 05:58:00.999 spawn: Executing "/bin/su"
2024-12-02 05:58:04.002 spawn: su: incorrect password
2024-12-02 05:58:04.004 spawn: Executing "/bin/su"
2024-12-02 05:58:07.006 spawn: su: incorrect password
2024-12-02 05:58:07.009 spawn: Executing "/bin/su"
2024-12-02 05:58:10.011 spawn: su: incorrect password
2024-12-02 05:58:10.013 spawn: Executing "/bin/su"
2024-12-02 05:58:12.992 mpegts: pipe:///bin/su vlcuser -c 'cvlc --no-audio --no-dbus --satip-host=192.168.8.188 "rtsp://192.168.8.188:554/?alisatid=38&freq=11881&pol=v&msys=dvbs2&mtype=8psk&ro=0.35&plts=on&sr=27500&fec=4&camode=0&vpid=1410&apid=1420&ttxpid=8191&subtpid=0&pmt=1400&prognu - scan no data, failed
2024-12-02 05:58:12.992 subscription: 0001: "scan" unsubscribin