Add a setting that controls ffmpeg verbosity

Don't display ffmpeg errors in tests

classes/Config.php

@@ -89,6 +89,14 @@ class Config
      */
     public $audioBitrate = 128;
 
+    /**
+     * avconv/ffmpeg logging level.
+     * Must be one of these: quiet, panic, fatal, error, warning, info, verbose, debug
+     *
+     * @var string
+     */
+    public $avconvVerbosity = 'error';
+
     /**
      * YAML config file path.
      *

classes/VideoDownload.php

@@ -276,7 +276,7 @@ class VideoDownload
         $builder = ProcessBuilder::create(
             [
                 $this->config->avconv,
-                '-v', 'error',
+                '-v', $this->config->avconvVerbosity,
                 //Vimeo needs a correct user-agent
                 '-user_agent', $this->getProp(null, null, 'dump-user-agent'),
                 '-i', $url,

config/config.example.yml

@@ -18,6 +18,9 @@ convert: false
 # Path to your avconv or ffmpeg binary
 avconv: vendor/bin/ffmpeg
 
+# avconv/ffmpeg logging level.
+avconvVerbosity: error
+
 # Path to your rtmpdump binary
 rtmpdump: vendor/bin/rtmpdump
 

config/config_test.yml

@@ -1,2 +1,3 @@
 ---
 convert: false
+avconvVerbosity: fatal

config/config_test_windows.yml

@@ -2,6 +2,7 @@
 convert: false
 python: C:\Python36\python.exe
 avconv: C:\ProgramData\chocolatey\bin\ffmpeg.exe
+avconvVerbosity: fatal
 rtmpdump: C:\ProgramData\chocolatey\bin\rtmpdump
 youtubedl: C:\Python36\Lib\site-packages\youtube_dl\__main__.py
 params: