old_contents: var Mpeg1Muxer, child_process, events, util
  
  child_process = require('child_process')
  
  util = require('util')
  
  events = require('events')
  
  Mpeg1Muxer = function(options) {
    var key
    this.url = options.url
    this.ffmpegOptions = options.ffmpegOptions
    this.exitCode = undefined
    this.additionalFlags = []
    if (this.ffmpegOptions) {
      for (key in this.ffmpegOptions) {
        this.additionalFlags.push(key)
        if (String(this.ffmpegOptions[key]) !== '') {
          this.additionalFlags.push(String(this.ffmpegOptions[key]))
        }
      }
    }
    this.spawnOptions = [
      "-rtsp_transport",
      "tcp",
      "-i",
      this.url,
      '-f',
      'mpeg1video',
      // additional ffmpeg options go here
      ...this.additionalFlags,
      '-'
    ]
    this.stream = child_process.spawn("ffmpeg", this.spawnOptions, {
      detached: false
    })
    this.inputStreamStarted = true
    this.stream.stdout.on('data', (data) => {
      return this.emit('mpeg1data', data)
    })
    this.stream.stderr.on('data', (data) => {
      return this.emit('ffmpegStderr', data)
    })
    this.stream.on('exit', (code, signal) => {
      if (code === 1) {
        console.error('RTSP stream exited with error')
        this.exitCode = 1
        return this.emit('exitWithError')
      }
    })
    return this
  }
  
  util.inherits(Mpeg1Muxer, events.EventEmitter)
  
  module.exports = Mpeg1Muxer
  
new_contents: var Mpeg1Muxer, child_process, events, util
  
  child_process = require('child_process')
  
  util = require('util')
  
  events = require('events')
  
  Mpeg1Muxer = function(options) {
    var key
    this.url = options.url
    this.ffmpegOptions = options.ffmpegOptions
    this.exitCode = undefined
    this.additionalFlags = []
    if (this.ffmpegOptions) {
      for (key in this.ffmpegOptions) {
        this.additionalFlags.push(key)
        if (String(this.ffmpegOptions[key]) !== '') {
          this.additionalFlags.push(String(this.ffmpegOptions[key]))
        }
      }
    }
    this.spawnOptions = [
      "-i",
      this.url,
      '-f',
      'mpegts',
      '-codec:v',
      'mpeg1video',
      // additional ffmpeg options go here
      ...this.additionalFlags,
      '-'
    ]
    this.stream = child_process.spawn("ffmpeg", this.spawnOptions, {
      detached: false
    })
    this.inputStreamStarted = true
    this.stream.stdout.on('data', (data) => {
      return this.emit('mpeg1data', data)
    })
    this.stream.stderr.on('data', (data) => {
      return this.emit('ffmpegStderr', data)
    })
    this.stream.on('exit', (code, signal) => {
      if (code === 1) {
        console.error('RTSP stream exited with error')
        this.exitCode = 1
        return this.emit('exitWithError')
      }
    })
    return this
  }
  
  util.inherits(Mpeg1Muxer, events.EventEmitter)
  
  module.exports = Mpeg1Muxer
  
subject: enable compatibility for latest jsmpeg