diff --git a/client/package.json b/client/package.json
index dd783cdc4..f7582737b 100644
--- a/client/package.json
+++ b/client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "audiobookshelf-client",
-  "version": "1.6.64",
+  "version": "1.6.65",
   "description": "Audiobook manager and player",
   "main": "index.js",
   "scripts": {
diff --git a/package.json b/package.json
index f3d0813de..15bd07d5b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "audiobookshelf",
-  "version": "1.6.64",
+  "version": "1.6.65",
   "description": "Self-hosted audiobook server for managing and playing audiobooks",
   "main": "index.js",
   "scripts": {
diff --git a/server/Server.js b/server/Server.js
index f3ba3ebb1..6d3a4d6f1 100644
--- a/server/Server.js
+++ b/server/Server.js
@@ -532,7 +532,7 @@ class Server {
     var exists = await fs.pathExists(outputDirectory)
     if (exists) {
       Logger.error(`[Server] Upload directory "${outputDirectory}" already exists`)
-      return res.status(500).error(`Directory "${outputDirectory}" already exists`)
+      return res.status(500).send(`Directory "${outputDirectory}" already exists`)
     }
 
     await fs.ensureDir(outputDirectory)
diff --git a/server/objects/Stream.js b/server/objects/Stream.js
index 210f40def..02dc09936 100644
--- a/server/objects/Stream.js
+++ b/server/objects/Stream.js
@@ -63,9 +63,12 @@ class Stream extends EventEmitter {
     return this.tracks[0].ext.toLowerCase().slice(1)
   }
 
+  // Fmp4 does not work on iOS devices: https://github.com/advplyr/audiobookshelf-app/issues/85
+  //   Workaround: Force AAC transcode for FLAC
   get hlsSegmentType() {
-    var hasFlac = this.tracks.find(t => t.ext.toLowerCase() === '.flac')
-    return hasFlac ? 'fmp4' : 'mpegts'
+    return 'mpegts'
+    // var hasFlac = this.tracks.find(t => t.ext.toLowerCase() === '.flac')
+    // return hasFlac ? 'fmp4' : 'mpegts'
   }
 
   get segmentBasename() {
@@ -333,7 +336,9 @@ class Stream extends EventEmitter {
     }
 
     const logLevel = process.env.NODE_ENV === 'production' ? 'error' : 'warning'
-    const audioCodec = (this.hlsSegmentType === 'fmp4' || this.tracksAudioFileType === 'opus' || this.transcodeForceAAC) ? 'aac' : 'copy'
+
+    const audioCodec = (this.tracksAudioFileType === 'flac' || this.tracksAudioFileType === 'opus' || this.transcodeForceAAC) ? 'aac' : 'copy'
+
     this.ffmpeg.addOption([
       `-loglevel ${logLevel}`,
       '-map 0:a',
@@ -354,8 +359,8 @@ class Stream extends EventEmitter {
     ]
     if (this.hlsSegmentType === 'fmp4') {
       hlsOptions.push('-strict -2')
-      // var fmp4InitFilename = Path.join(this.streamPath, 'init.mp4')
-      var fmp4InitFilename = 'init.mp4'
+      var fmp4InitFilename = Path.join(this.streamPath, 'init.mp4')
+      // var fmp4InitFilename = 'init.mp4'
       hlsOptions.push(`-hls_fmp4_init_filename ${fmp4InitFilename}`)
     }
     this.ffmpeg.addOption(hlsOptions)
diff --git a/server/utils/prober.js b/server/utils/prober.js
index a6e79f39d..bc8623e1c 100644
--- a/server/utils/prober.js
+++ b/server/utils/prober.js
@@ -1,5 +1,8 @@
 const ffprobe = require('node-ffprobe')
-const Path = require('path')
+
+if (process.env.FFPROBE_PATH) {
+  ffprobe.FFPROBE_PATH = process.env.FFPROBE_PATH
+}
 
 const AudioProbeData = require('../scanner/AudioProbeData')
 
@@ -278,11 +281,7 @@ function parseProbeData(data, verbose = false) {
 
 // Updated probe returns AudioProbeData object
 function probe(filepath, verbose = false) {
-  var options = {}
-  if (process.env.FFPROBE_PATH) {
-    options.path = process.env.FFPROBE_PATH
-  }
-  return ffprobe(filepath, options)
+  return ffprobe(filepath)
     .then(raw => {
       var rawProbeData = parseProbeData(raw, verbose)
       if (!rawProbeData || !rawProbeData.audio_stream) {