What libraries for C, C++ are suitable for implementing camera recording?

Question

C++ / C#

We wrote a program in ffmpeg to record video from CCTV cameras, it didn’t quite fit, we are looking for other libraries for C, C ++ that will allow us to implement - recording an RTSP stream at a resolution of up to 5mpx, with h264, h264+, h265, h265+ video codecs
Updated: There is a program - Ivideon server, you can write more than 20 cameras locally there, and the CPU usage is not high, but the full version of the program is paid.
There is also Securos lite, it has a lot of functionality, and the program requires good hardware.
We tried Ispy, it didn’t fit, some kind of unstable ..
Let me explain the situation: We are installing video surveillance in MKD, we want a server program to record video from cameras and view the archive, both locally and through an application or website. The server program is needed only for 3 things:
1. Recording the archive;
2.View;
3. Loading or downloading records.
I'm sure people here know, maybe it will help.

Answer 1

ffmpeg's competitor is gstreamer.

Answer 2

OpenCV look