[mirotalksfu] - add RTMP server and multi-source streaming!, update dep

rtmpServers/demo/client-server-socket/server/RtmpStreamer.js

@@ -0,0 +1,68 @@
+'use strict';
+
+const { PassThrough } = require('stream');
+const ffmpeg = require('fluent-ffmpeg');
+const ffmpegInstaller = require('@ffmpeg-installer/ffmpeg');
+ffmpeg.setFfmpegPath(ffmpegInstaller.path);
+
+class RtmpStreamer {
+    constructor(rtmpUrl, rtmpKey, socket) {
+        (this.socket = socket), (this.rtmpUrl = rtmpUrl);
+        this.rtmpKey = rtmpKey;
+        this.stream = new PassThrough();
+        this.ffmpegStream = null;
+        this.initFFmpeg();
+        this.run = true;
+    }
+
+    initFFmpeg() {
+        this.ffmpegStream = ffmpeg()
+            .input(this.stream)
+            .inputOptions('-re')
+            .inputFormat('webm')
+            .videoCodec('libx264')
+            .videoBitrate('3000k')
+            .size('1280x720')
+            .audioCodec('aac')
+            .audioBitrate('128k')
+            .outputOptions(['-f flv'])
+            .output(this.rtmpUrl)
+            .on('start', (commandLine) => console.info('ffmpeg command', { id: this.rtmpKey, cmd: commandLine }))
+            .on('error', (err, stdout, stderr) => {
+                if (!err.message.includes('Exiting normally')) {
+                    console.error('FFmpeg error:', { id: this.rtmpKey, error: err.message });
+                    this.socket.emit('error', err.message);
+                }
+                this.end();
+            })
+            .on('end', () => {
+                console.info('FFmpeg process ended', this.rtmpKey);
+                this.end();
+            })
+            .run();
+    }
+
+    write(data) {
+        if (this.stream) this.stream.write(data);
+    }
+
+    isRunning() {
+        return this.run;
+    }
+
+    end() {
+        if (this.stream) {
+            this.stream.end();
+            this.stream = null;
+            console.info('RTMP streaming stopped', this.rtmpKey);
+        }
+        if (this.ffmpegStream && !this.ffmpegStream.killed) {
+            this.ffmpegStream.kill('SIGTERM');
+            this.ffmpegStream = null;
+            console.info('FFMPEG closed successfully', this.rtmpKey);
+        }
+        this.run = false;
+    }
+}
+
+module.exports = RtmpStreamer;