Error in saving the stream

[Dani]

Last night we had a strange error for 90 min (which resolved itself)
The video stream (that has only sound) was not recorded correctly.
All the files are 4K in size. any idea what might caused that ?
I'm attaching one sample file.

 

[Max]

Good day.
The sample file contains only webm header and no media data (has 0:00:00 duration). This can occur if there was no media data in the stream published, or no key frames.

The video stream (that has only sound) was not recorded correctly.

The recording can start only from key frame, so seems like ther were no keyframes in the stream during this time.