public function clipWebM($src, $dest, $from, $to)
    {
        $ffmpeg = FFMpeg::create();
        $video  = $ffmpeg->open($src);

        if($from >= $to) 
            throw new Exception("The start clipping time must be less than end clipping time");
            
        $video
            ->filters()
            ->clip(Coordinate\TimeCode::fromSeconds($from), Coordinate\TimeCode::fromSeconds($to));

        $video
            ->save(new Video\WebM(), $dest);

        if($video) return true;
        else return false;
    }