ch1 substream not presenting codec parameters, fails in ffmpeg and others. vbuffer related?

[wltechblog]

Discussing this issue on Discord but tracking it here.

substream channel isn't functioning properly in most software (mpv and go2rtc seem to work).

Consider increasing the value for the 'analyzeduration' (1000000) and 'probesize' (1000000) options
Input #0, rtsp, from 'rtsp://thingino:[email protected]:554/ch1':
  Metadata:
    title           : thingino prudynt
    comment         : stream1
  Duration: N/A, start: -0.000250, bitrate: N/A
  Stream #0:0: Video: h264, none, 90k tbr, 90k tbn
  Stream #0:1: Audio: opus, 48000 Hz, mono, fltp```

disabling vbuffer seems to be a successful workaroung.

Note from @gtxaspec 
```it's trying to create another rtsp server...hmm
[ERROR:RTSP.cpp]: Failed to create RTSP server: IPv6 bind() error (port number: 554): Address in use
for the sub stream,when it should reuse the existing one

workaround to disable vbuffer:

reboot```

[dwebfr2]

after workaround with disabling vbuffer and reboot

chmod -x /etc/init.d/S96vbuffer
reboot

substream ch1 works now in VLC, before it didnt work

[themactep]

Yes, that is prudynt peculiarity when one client (vbuffer) wants a stream without audio. That breaks things for other clients. Will need a fix.