nginx.conf

        location ~ ^/video-media/hlsfmp4/.+$ {
            content_by_lua_block {
            require "string";

            function split(inputstr, sep)
                if sep == nil then
                    sep = "%s"
                end
                local t={} ; i=1
                for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
                    t[i] = str
                    i = i + 1
                end
                return t
            end

            ngx.header["Access-Control-Allow-Headers"] = '*';
            ngx.header["Access-Control-Allow-Origin"] = '*';
            ngx.header["Access-Control-Allow-Methods"] = 'GET, HEAD, OPTIONS';

            hls_manifest = ngx.var.request_uri:gsub("fmp4", "")
            hls_content = ngx.location.capture(hls_manifest)

            if hls_content.status ~= ngx.HTTP_OK then
                ngx.print("failed requesting " .. hls_manifest)
                ngx.exit(ngx.HTTP_SERVICE_UNAVAILABLE)
            end

            init_segment_header = "#EXT-X-PLAYLIST-TYPE:VOD\n#EXT-X-MAP:URI="
            init_segment_uri = "http://" .. ngx.var.host .. ngx.var.request_uri:gsub("hlsfmp4","dash"):gsub("index","init")

            if string.match(ngx.var.request_uri, "index") then
                if string.match(ngx.var.request_uri, "index%-v1") then
                    init_segment_uri, _ = init_segment_uri:gsub("a1.m3u8","x3.mp4")
                    res, _ = hls_content.body:gsub("EXT-%-X%-PLAYLIST%-TYPE:VOD", init_segment_header .. init_segment_uri):gsub("-a1.ts","-x3.m4s"):gsub("hls", "dash")
                elseif string.match(ngx.var.request_uri, "index%-a1") then
                    init_segment_uri, _ = init_segment_uri:gsub("m3u8","mp4")
                    res, _ = hls_content.body:gsub("EXT-%-X%-PLAYLIST%-TYPE:VOD", init_segment_header .. init_segment_uri):gsub(".ts","-x3.m4s"):gsub("hls", "dash")
                end
                ngx.print(res)
            else
                res, _ = hls_content.body:gsub("hls", "hlsfmp4")
                ngx.say(res)
                uri_splitted = split(ngx.var.request_uri, ",")
                audio_track_uri = "http://" .. ngx.var.host ..uri_splitted[1] .. uri_splitted[2] .. "/index-a1-x3.m3u8"
                audio_track ='#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac",LANGUAGE="en",NAME="English",DEFAULT=YES,AUTOSELECT=YES,URI="' .. audio_track_uri .. '"\n'
                ngx.print(audio_track)
            end
            }
        }