Usage

```ruby @client = HikOpenapi::Client.new do |config| config.host = “https://192.168.3.230” config.prefix = “/artemis” config.app_key = “app_key” config.app_secret = “app_secret” config.proxy = { host: “127.0.0.1”, port: 8123 } end

params = { ‘cameraIndexCode’: [url], ‘streamType’: 0, ‘protocol’: [video_type], ‘transmode’: 0, ‘expand’: “transcode=0”, }

res = @client.post(“/api/video/v1/cameras/previewURLs”, params)

```