RTSP Media Sources - Instability of Zowiecam Streams

D

dm7

New Member
Hello - I am a little desperate and hoping to find some hints or advice how to proceed with my issue:


Error Report: RTSP Media Sources - Instability of Zowiecam Streams

Problem Overview:

  • RTSP streams from Zowiecams are unstable.
  • Streams worked stably for a week, but since the day before yesterday, the following issues have been observed:
    • Previews of Zowiecams mostly do not appear.
    • Stream appears briefly after changing settings, but disappears after a maximum of 2 minutes.
    • OBS sends RTSP TEARDOWN, stream restarts, but the preview and virtual camera remain black.
Details:
  • Devices:
    • 1x TPLINK C210 (NAT: 192.168.1.157) (WIFI connected)
    • 3x Zowiecam 4K POV (2x NAT: 192.168.1.141, 192.168.1.142; 1x LAN: 172.21.0.61) (1GBit copper)
    • OBS (Win10): 172.21.0.42 (1GBit copper)
    • OBS (Win11): 192.168.1.42 (Due to network architecture this notebook is not able to access 172.21.0.61 - which is totally ok for now). (WIFI connected)
  • Observations:
    • Wireshark shows active RTSP stream when something is visible in the preview.
    • OBS sends RTSP TEARDOWN, image disappears, stream restarts.
    • Task Manager shows network traffic and resource usage by OBS, but no image in preview/virtual camera.
    • VLC and FFplay streams are stable while OBS shows nothing.
  • Actions Taken:
    • Tried various ffmpeg options and combinations of them:
      • rtsp_transport=udp buffer_size=20000000 probesize=5000000 analyzeduration=10000000 fflags=+genpts
      • rtsp_transport=tcp buffer_size=20000000 probesize=5000000 analyzeduration=10000000 max_delay=5000000
      • rtsp_transport=tcp buffer_size=20000000 fflags=nobuffer probesize=10000000 analyzeduration=20000000 max_delay=5000000 reorder_queue_size=2500000
      • rtsp_transport=tcp probesize=5000000 analyzeduration=10000000 fflags=+genpts fflags=low_delay fflags=nobuffer
      • rtsp_transport=tcp buffer_size=2000000 probesize=50000000 analyzeduration=10000000 rtsp_flags=prefer_tcp
    • No errors in OBS logs.
    • Last Windows update installed 10 days ago.
    • I reviewed https://obsproject.com/kb/gpu-selection-guide because both computers have 2 GPUs.
Additional Information:
Assistance Needed:
  • Stabilization of Zowiecam RTSP streams in OBS.
  • Identification and resolution of the cause for RTSP TEARDOWNs and the disappearance of streams after a short time.

Thank you for your support.
 
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