This is not a working project, this is an example!
For ip cameras, I recommend using the usual get request for the poster. example for dahua [http:///onvif/media_service/snapshot?channel=0&subtype=0]
For this example, I recommend using CUDA, but this will require separate work and will greatly reduce the load on the cpu.
I recommend limiting the number of frames when using mjpeg or using gpu.

Installation

mac os

brew install ffmpeg

debian / ubuntu

apt install libavcodec-dev libavcodec-ffmpeg56 libavformat-dev libavformat-ffmpeg56

Download Source

Download source

$ git clone https://github.com/deepch/RTSPtoImage

CD to Directory
```
 $ cd RTSPtoImage/
```
Test Run
```
 $ GO111MODULE=on go run *.go
```

Open Browser

open web browser http://127.0.0.1:8083 work chrome, safari, firefox

Configuration

Edit file config.json

format:

{
  "server": {
    "http_port": ":8083"
  },
  "streams": {
   "H264_AAC": {
      "url": "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov"
    }
  }
}