Weird black thing on the stream

[verzinwat-verzinwat]

Problem: My go pro udp stream is showing some weird black and purple things at 90% of the udp stream. Describe your problem as accurately as possible, include key details that help resolve your issue.

Details:

• GoPro Camera(s): goor hero 5 session
• Firmware Version:
• Steps to reproduce: Go to http://10.5.5.9/gp/gpControl/execute?p1=gpStream&a1=proto_v2&c1=restart, Change noting. Open udp link in VLC. and get this, I can hear sound and the room was very dark.
• Happens every time? [Y/N]: YEs