diff --git a/src/Format/Copy.php b/src/Format/Copy.php
new file mode 100644
index 0000000..cd504c0
--- /dev/null
+++ b/src/Format/Copy.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Danjones\FFMpeg\Format;
+
+use FFMpeg\Format\FormatInterface;
+
+class Copy implements FormatInterface
+{
+    public function getPasses()
+    {
+        return 1;
+    }
+
+    public function getExtraParams()
+    {
+        return [];
+    }
+}
diff --git a/src/Format/SubtitleInterface.php b/src/Format/SubtitleInterface.php
index f4f4909..03dd74e 100644
--- a/src/Format/SubtitleInterface.php
+++ b/src/Format/SubtitleInterface.php
@@ -2,9 +2,7 @@
 
 namespace Danjones\FFMpeg\Format;
 
-use FFMpeg\Format\AudioInterface;
 use FFMpeg\Format\FormatInterface;
-use FFMpeg\Format\ProgressListener\AbstractProgressListener;
 
 interface SubtitleInterface extends FormatInterface
 {
diff --git a/src/Stream.php b/src/Stream.php
index ab69c5a..c3cb734 100644
--- a/src/Stream.php
+++ b/src/Stream.php
@@ -60,18 +60,21 @@ class Stream
     protected function parseCodec(): static
     {
         if ($this->codec instanceof VideoInterface) {
-            return $this->parseVideo();
+            $this->parseVideo();
         }
 
         if ($this->codec instanceof AudioInterface) {
-            return $this->parseAudio();
+            $this->parseAudio();
         }
 
         if ($this->codec instanceof Format\SubtitleInterface) {
-            return $this->parseSubtitle();
+            $this->parseSubtitle();
+        }
+
+        if ($this->codec instanceof Format\Copy) {
+            $this->addFlag('c', 'copy');
         }
 
-        $this->addFlag('c', 'copy');
         $this->parseExtras($this->codec->getExtraParameters());
 
         return $this;
@@ -82,7 +85,6 @@ class Stream
         if (null !== ($codec = $this->codec->getSubtitleCodec())) {
             $this->addFlag('c', $codec);
         }
-        $this->parseExtras($this->codec->getExtraParameters());
 
         return $this;
     }
@@ -100,7 +102,6 @@ class Stream
         if (null !== ($channels = $this->codec->getAudioChannels())) {
             $this->addFlag('ac', $channels);
         }
-        $this->parseExtras($this->codec->getExtraParameters());
 
         return $this;
     }
@@ -115,9 +116,7 @@ class Stream
             $this->addFlag('b', "{$kb}k");
         }
 
-        // If the user passed some additional format parameters.
         $this->parseExtras($this->codec->getAdditionalParameters());
-        $this->parseExtras($this->codec->getExtraParameters());
 
         return $this;
     }