srsconfig.js

const fs = require('fs');

async function genConfig(
    match_id_court1, stream_id_court1,
    match_id_court2, stream_id_court2,
    match_id_court3, stream_id_court3,
    match_id_court4, stream_id_court4) 
{
	const conf_str = `
# the config for srs to delivery stream for OSVB, rtmp + ffmpeg

listen              1935;
srs_log_tank        file;
srs_log_file        /root/SRS-CentOS6-x86_64-2.0.258/usr/local/srs/objs/osvb2-srs.log;
pid            /root/SRS-CentOS6-x86_64-2.0.258/usr/local/srs/objs/osvb2.pid;
max_connections     1000;
vhost __defaultVhost__ {
	transcode {
		enabled     on;
		ffmpeg      /root/bin/ffmpeg;

	engine court2 {
             enabled         on;
             vfilter {
                 loop 1;
                 f image2;
                 i /root/volleyscore-downloader/${match_id_court2}.png;
                 filter_complex  'overlay';
             }
             vcodec          libx264;
             vthreads        4;
             vprofile        main;
             vpreset         medium;
             vparams {
            }
             acodec          libfdk_aac;
             aparams {
             }
             output        rtmp://127.0.0.1:[port]/[app]?vhost=[vhost]/[stream]_[engine]; 
         }
	

		engine court4 {
		    enabled         on;
		    vfilter {
				loop 1;
				f image2;
				i /root/volleyscore-downloader/${match_id_court4}.png;
				filter_complex  'overlay';
		    }
		    vcodec          libx264;
		    vthreads        4;
		    vprofile        main;
		    vpreset         medium;
		    vparams {
		    }
		    acodec          libfdk_aac;
		    aparams {
		    }
		    output        rtmp://127.0.0.1:[port]/[app]?vhost=[vhost]/[stream]_[engine]; 
		}
	}
}`

	fs.writeFileSync(
                "/root/SRS-CentOS6-x86_64-2.0.258/usr/local/srs/conf/osvb2.conf", 
		conf_str, function(err) 
	{

	    if (err) {
		return console.log(err);
	    }
	    console.log("OSVB config file updated");
	}); 
}

module.exports = genConfig