LM object data as metadata on videocamera's stream

[admin]

Try this, change camera URL and text message as needed. Uncomment last line with logging if request does not work.

Code:

url = 'http://USER:PASS@IP/Video/inputs/channels/1/overlays/text/1'
text = 'Test message'

function http_put_xml(url, xml)
  local http = require('socket.http')
  local ltn12 = require('ltn12')
  local resp = {}

  local res, code = http.request({
    url = url,
    method = 'PUT',
    headers = {
      ['content-type'] = 'text/xml',
      ['content-length'] = #xml,
    },
    source = ltn12.source.string(xml),
    sink = ltn12.sink.table(resp),
  })

  if res then
    return table.concat(resp), code
  else
    return nil, code
  end
end

function xml_escape(text)
  return text
    :gsub('&', '&')
    :gsub('<', '&lt;')
    :gsub('>', '&gt;')
    :gsub('"', '&quot;')
    :gsub("'", '&apos;')
end

xml = [[<?xml version="1.0" encoding="UTF-8"?>
<TextOverlay xmlns="http://www.hikvision.com/ver10/XMLSchema" version="1.0">
<id>1</id>
<enabled>true</enabled>
<posX>16</posX>
<posY>16</posY>
<message>]] .. xml_escape(text) .. [[</message>
</TextOverlay>]]

res, err = http_put_xml(url, xml)
-- log(res, err)