How to create a stream from images using FFMPEG?

Question

JavaScript

There is a video camera. It serves the image via http, something like this http://1.2.3.4:80/img.jpg. I want to collect a stream of real-time images and issue it via RTMP and HLS. NGINX is configured, I pass rtsp through it to RTMP and HLS. We need a substream assembled from pictures. How to force ffmpeg to collect 2 times per second the image from the camera?
Ps or force the script to change the image in the div once every half a second, or a player that can request an image

Answer 1

setInterval(function () {$("#myimg").attr("src", " http://1.2.3.4:80/img.jpg.?timestamp= " + new Date().getTime()); }, 500) reload something like this (example with jquery just for demonstration), timestamp that would not be cached.
If you want to create a stream, it will be much more cumbersome: you will need to run wget every half second through watch and give the result to ffmpeg, which will append pictures to the video stream.

Answer 2

for sure, the camera can do motion jpeg, it is inserted into the page with the usual img tag. what model?