diff --git a/classes/Config.php b/classes/Config.php
index cb57e67..2b31571 100644
--- a/classes/Config.php
+++ b/classes/Config.php
@@ -31,10 +31,10 @@ class Config
 
     public $youtubedl = 'vendor/rg3/youtube-dl/youtube_dl/__main__.py';
     public $python = '/usr/bin/python';
-    public $params = array('--no-playlist', '--no-warnings', '-f best', '--playlist-end', 1);
+    public $params = array('--no-playlist', '--no-warnings', '-f best[protocol^=http]', '--playlist-end', 1);
     public $convert = false;
     public $avconv = 'vendor/bin/ffmpeg';
-    public $curl_params = '';
+    public $curl_params = array();
 
     /**
      * Config constructor
diff --git a/composer.json b/composer.json
index a73525c..504b1e0 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,8 @@
 		"mathmarques/smarty-view": "~1.1.0",
 		"symfony/yaml": "~3.0.0",
 		"symfony/process": "~3.0.0",
-		"ffmpeg/ffmpeg": "~2.8.2",
+		"ptachoire/process-builder-chain": "~1.2.0",
+		"ffmpeg/ffmpeg": "dev-release",
 		"rudloff/smarty-plugin-noscheme": "~0.1.0",
 		"guzzlehttp/guzzle": "~6.2.0"
 	},
@@ -40,7 +41,7 @@
 		"type": "package",
 		"package": {
 			"name": "ffmpeg/ffmpeg",
-			"version": "2.8.4",
+			"version": "dev-release",
 			"dist": {
 				"url": "http://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit-static.tar.xz",
 				"type": "xz"
diff --git a/composer.lock b/composer.lock
index e0ab147..cae8a1c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "347d65d546b37e0a0f459d98687906ad",
-    "content-hash": "e4325cba5a550465b162ab31dd37ecf3",
+    "hash": "e1cdeb4248ab93397c2fa390a76b0c62",
+    "content-hash": "8ad4495699681f4ade03f5e0fbe0b074",
     "packages": [
         {
             "name": "container-interop/container-interop",
@@ -36,7 +36,7 @@
         },
         {
             "name": "ffmpeg/ffmpeg",
-            "version": "2.8.4",
+            "version": "dev-release",
             "dist": {
                 "type": "xz",
                 "url": "http://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit-static.tar.xz",
@@ -533,6 +533,42 @@
             ],
             "time": "2015-05-04 20:22:00"
         },
+        {
+            "name": "ptachoire/process-builder-chain",
+            "version": "1.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/krichprollsch/process-builder-chain.git",
+                "reference": "465055dbcc3b5ef792a768df935571551de4781a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/krichprollsch/process-builder-chain/zipball/465055dbcc3b5ef792a768df935571551de4781a",
+                "reference": "465055dbcc3b5ef792a768df935571551de4781a",
+                "shasum": ""
+            },
+            "require": {
+                "symfony/process": "~2.5 || ~3.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "Chain": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Pierre Tachoire",
+                    "email": "pierre.tachoire@gmail.com"
+                }
+            ],
+            "description": "Add ability to chain symfony processes",
+            "time": "2016-04-10 08:33:20"
+        },
         {
             "name": "rg3/youtube-dl",
             "version": "2016.04.06",
@@ -931,7 +967,9 @@
     ],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": [],
+    "stability-flags": {
+        "ffmpeg/ffmpeg": 20
+    },
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": [],
diff --git a/controllers/FrontController.php b/controllers/FrontController.php
index 8157acc..3f6c9e9 100644
--- a/controllers/FrontController.php
+++ b/controllers/FrontController.php
@@ -14,6 +14,8 @@ namespace Alltube\Controller;
 
 use Alltube\VideoDownload;
 use Alltube\Config;
+use Symfony\Component\Process\ProcessBuilder;
+use Chain\Chain;
 
 /**
  * Main controller
@@ -115,7 +117,18 @@ class FrontController
                     try {
                         return $this->getStream($params["url"], 'bestaudio[protocol^=http]', $response, $request);
                     } catch (\Exception $e) {
-                        $video = $this->download->getJSON($params["url"]);
+                        $video = $this->download->getJSON($params["url"], 'best');
+
+                        $avconvProc = ProcessBuilder::create(
+                            array(
+                                $this->config->avconv,
+                                '-v', 'quiet',
+                                '-i', '-',
+                                '-f', 'mp3',
+                                '-vn',
+                                'pipe:1'
+                            )
+                        );
 
                         //Vimeo needs a correct user-agent
                         ini_set(
@@ -123,6 +136,33 @@ class FrontController
                             $video->http_headers->{'User-Agent'}
                         );
                         if (parse_url($video->url, PHP_URL_SCHEME) == 'rtmp') {
+                            $builder = new ProcessBuilder(
+                                array(
+                                    '/usr/bin/rtmpdump',
+                                    '-q',
+                                    '-r',
+                                    $video->url,
+                                    '--pageUrl', $video->webpage_url
+                                )
+                            );
+                            if (isset($video->player_url)) {
+                                $builder->add('--swfVfy');
+                                $builder->add($video->player_url);
+                            }
+                            if (isset($video->flash_version)) {
+                                $builder->add('--flashVer');
+                                $builder->add($video->flash_version);
+                            }
+                            if (isset($video->play_path)) {
+                                $builder->add('--playpath');
+                                $builder->add($video->play_path);
+                            }
+                            foreach ($video->rtmp_conn as $conn) {
+                                $builder->add('--conn');
+                                $builder->add($conn);
+                            }
+                            $chain = new Chain($builder->getProcess());
+                            $chain->add('|', $avconvProc);
                             ob_end_flush();
                             header(
                                 'Content-Disposition: attachment; filename="'.
@@ -136,13 +176,22 @@ class FrontController
                                 ).'"'
                             );
                             header("Content-Type: audio/mpeg");
-                            passthru(
-                                '/usr/bin/rtmpdump -q -r '.escapeshellarg($video->url).
-                                '   |  '.$this->config->avconv.
-                                ' -v quiet -i - -f mp3 -vn pipe:1'
-                            );
+                            passthru($chain->getProcess()->getCommandLine());
                             exit;
                         } else {
+                            $chain = new Chain(
+                                ProcessBuilder::create(
+                                    array_merge(
+                                        array('curl'),
+                                        $this->config->curl_params,
+                                        array(
+                                            '--user-agent', $video->http_headers->{'User-Agent'},
+                                            $video->url
+                                        )
+                                    )
+                                )
+                            );
+                            $chain->add('|', $avconvProc);
                             ob_end_flush();
                             header(
                                 'Content-Disposition: attachment; filename="'.
@@ -156,13 +205,7 @@ class FrontController
                                 ).'"'
                             );
                             header("Content-Type: audio/mpeg");
-                            passthru(
-                                'curl '.$this->config->curl_params.
-                                ' --user-agent '.escapeshellarg($video->http_headers->{'User-Agent'}).
-                                ' '.escapeshellarg($video->url).
-                                '   |  '.$this->config->avconv.
-                                ' -v quiet -i - -f mp3 -vn pipe:1'
-                            );
+                            passthru($chain->getProcess()->getCommandLine());
                             exit;
                         }
                     }