php and ffmpeg: how to set parameter '-c:v' 'copy' in php?

Question

I am using phpffmpeg library with Laravel

 $ffmpeg = FFMpeg::fromDisk($disk)
          ->open($videoPathDisk)
            ->getFrameFromSeconds(1)
            ->export()
          ->toDisk($disk);

          $ffmpeg->save($path.$videoPoster);

The process is very slow. When I use command like ffmpeg with '-c:v' 'copy' parameters, process speeds up.

Question: How can I inject that parameter to my phpffmpeg snippet ?