additionalParameters capability in audio formats

src/FFMpeg/Format/Audio/Aac.php

@@ -26,6 +26,8 @@ public function __construct()
      */
     public function getAvailableAudioCodecs()
     {
-        return ['libfdk_aac'];
+
+        return array('aac','copy','libfdk_aac');
+
     }
 }

src/FFMpeg/Format/Audio/DefaultAudio.php

@@ -30,6 +30,9 @@ abstract class DefaultAudio extends EventEmitter implements AudioInterface, Prog
     /** @var int */
     protected $audioChannels = null;
 
+    /** @var Array */
+    protected $additionalParamaters;
+
     /**
      * {@inheritdoc}
      */
@@ -138,4 +141,29 @@ public function getPasses()
     {
         return 1;
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAdditionalParameters()
+    {
+        return $this->additionalParamaters;
+    }
+
+    /**
+     * Sets additional parameters.
+     *
+     * @param  array                    $additionalParamaters
+     * @throws InvalidArgumentException
+     */
+    public function setAdditionalParameters($additionalParamaters)
+    {
+        if (!is_array($additionalParamaters)) {
+            throw new InvalidArgumentException('Wrong additionalParamaters value. Must be an array.');
+        }
+
+        $this->additionalParamaters = $additionalParamaters;
+
+        return $this;
+    }
 }

src/FFMpeg/Format/Audio/Mp3.php

@@ -26,6 +26,8 @@ public function __construct()
      */
     public function getAvailableAudioCodecs()
     {
-        return ['libmp3lame'];
+
+        return array('copy','libmp3lame');
+
     }
 }

src/FFMpeg/Format/AudioInterface.php

@@ -40,4 +40,11 @@ public function getAudioCodec();
      * @return array
      */
     public function getAvailableAudioCodecs();
+
+    /**
+     * Returns the list of additional parameters for this format.
+     *
+     * @return array
+     */
+    public function getAdditionalParameters();
 }

src/FFMpeg/Media/AbstractVideo.php

@@ -205,6 +205,11 @@ protected function buildCommand(FormatInterface $format, $outputPathfile)
                 $commands[] = '-ac';
                 $commands[] = $format->getAudioChannels();
             }
+            if (null !== $format->getAdditionalParameters()) {
+                foreach ($format->getAdditionalParameters() as $additionalParameter) {
+                    $commands[] = $additionalParameter;
+                }
+            }
         }
 
         // If the user passed some additional parameters

src/FFMpeg/Media/Audio.php

@@ -127,6 +127,14 @@ protected function buildCommand(FormatInterface $format, $outputPathfile)
             $commands[] = '-ac';
             $commands[] = $format->getAudioChannels();
         }
+
+        // If the user passed some additional parameters
+        if (null !== $format->getAdditionalParameters()) {
+            foreach ($format->getAdditionalParameters() as $additionalParameter) {
+                $commands[] = $additionalParameter;
+            }
+        }
+
         $commands[] = $outputPathfile;
 
         return $commands;