1.测试一下音频淡出效果

@@ -68,11 +68,11 @@ class AdminMakeImmerse implements ShouldQueue
             if ($is_bgm) {
                 // 有背景音  融合
                 $audio = $this->getAbsolutePath($this->getTempPath('.mp3','audio'));
-                $cmd = $this->ffmpeg . ' -y '.
-                    ' -i ' . escapeshellarg($file) .
+                $cmd = $this->ffmpeg .
+                    ' -y -i ' . escapeshellarg($file) .
                     ' -i ' . escapeshellarg($bgm) .
-                    ' -filter_complex amix=inputs=2:duration=first:dropout_transition=2[amix];[amix]afade=t=out:st=33:d=5[afade] ' .
-                    ' -map[afade] -ar 48000 -ab 64k  ' . escapeshellarg($audio);
+                    ' -filter_complex amix=inputs=2:duration=first:dropout_transition=2' .
+                    ' -ar 48000 -ab 64k  ' . escapeshellarg($audio);
                 if (!$this->execCmd($cmd)) return;
 
                 $audio_input = ' -i ' . escapeshellarg($audio);
@@ -96,7 +96,7 @@ class AdminMakeImmerse implements ShouldQueue
                 $audio = $this->getAbsolutePath($this->getTempPath('.mp3','audio'));
                 $cmd = $this->ffmpeg .
                     ' -y -i ' . escapeshellarg($audio_empty) .
-                    ' -y -i ' . escapeshellarg($bgm) .
+                    ' -i ' . escapeshellarg($bgm) .
                     ' -filter_complex amix=inputs=2:duration=first:dropout_transition=2 ' .
                     '-ar 48000 -ab 64k  ' . escapeshellarg($audio);
                 if (!$this->execCmd($cmd)) return;