Problem with thread access in ffmpeg

RouterOS General
1

Colleagues!
Good day!
There is a problem that I already despaired of solving.
I have a server that broadcasts various video streams. Also there is a receiver - ffmpeg. It records streaming video, splits it into files and imposes graphics.
When the gateway is a server with FreeBSD, everything is in order.
As soon as I replace it with a Mikrotik, the flow begins to interrupt and write. At the same time - it all works.
What is the problem and where to dig?
I ask for help!

Mikrotik: RouterBOARD 1100
FFMPEG parameters:

ffmpeg -i rtmp://194...:1935//*** -vf “drawtext=‘fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSerif.ttf: text=%{localtime}’: r=23.976: x=(w-tw)/2: y=h-(2*lh): fontcolor=white: box=1: boxcolor=0x00000099” -vcodec libx264 -x264opts bitrate=1500:vbv-maxrate=1500:vbv-bufsize=3000:nal-hrd=vbr -crf 0 -preset faster -f segment -segment_time 1800 -segment_format ts “capture-%03d.ts”


I suspect that there is a queue overflow, but what and where …
Thank you!

2

What, no one with a similar encounter?

3

What’s the bandwidth of the source stream?

4

Encoding type:
FPS: 25
GOP: 30
Bitrate(kbit): 1800
Encoded size: 1280x720
H.264 Level: high profile
Bitrate control: vbr
The original size that comes in the form of a SDI: 1920x1080 and 25 frames.
I try to transfer both the smaller sizes of a picture, and original.

5

Very weird. RTMP uses TCP and 1.8mbps should be no problem for any Routerboard. Maybe check MTU etc?

6

MTU checked and everything is fine with it … I also checked that the flow control is disabled. I really do not understand what the problem is in this case. On the Internet, too, there are no records of this.