[mirotalksfu] - fix ffmpeg in Docker

app/src/RtmpStreamer.js

@@ -1,9 +1,10 @@
 'use strict';
 
+const config = require('./config');
 const { PassThrough } = require('stream');
 const ffmpeg = require('fluent-ffmpeg');
-const ffmpegInstaller = require('@ffmpeg-installer/ffmpeg');
-ffmpeg.setFfmpegPath(ffmpegInstaller.path);
+const ffmpegPath = config.server.rtmp && config.server.rtmp.ffmpeg ? config.server.rtmp.ffmpeg : '/usr/bin/ffmpeg';
+ffmpeg.setFfmpegPath(ffmpegPath);
 
 const Logger = require('./Logger');
 const log = new Logger('RtmpStreamer');