Migrar posts de um site WordPress para outro

gistfile1.php

<?php
ignore_user_abort(1);
set_time_limit(0);
@ini_set('max_execution_time', 0);
include(ABSPATH . "wp-blog-header.php");


	$fotos = $wpdb->get_results("SELECT * FROM videos ORDER BY id DESC");

	foreach( $fotos as $foto ){
		$titulo = $foto->titulo;
        $youtube = $foto->youtube;
        $imagem = $foto->imagem;

        // Insert post
        $defaults = array(
            'post_status' => 'publish',
            'post_type' => 'videos',
            'post_author' => 1,
            'post_title' => $titulo,
            'post_content' => $conteudo,
        );
        $post_id = wp_insert_post( $defaults );

        update_post_meta($post_id, 'url_do_video_no_youtube', $youtube);

        $caminho_int = "wp-content/uploads/2014/04/" . urldecode( basename( $imagem ) );
        copy( $imagem, $caminho_int );

        $wp_filetype = wp_check_filetype( basename($caminho_int), null );
        $wp_upload_dir = wp_upload_dir();

        $attachment = array(
            'guid' => $wp_upload_dir['url'] . '/' . basename( $caminho_int ),
            'post_mime_type' => $wp_filetype['type'],
            'post_title' => preg_replace('/\.[^.]+$/', '', basename( $caminho_int ) ),
            'post_content' => '',
            'post_status' => 'inherit'
        );
        $attach_id = wp_insert_attachment( $attachment, $caminho_int, $post_id );
        require_once( ABSPATH . 'wp-admin/includes/image.php' );
        $attach_data = wp_generate_attachment_metadata( $attach_id, $caminho_int );
        wp_update_attachment_metadata( $attach_id, $attach_data );

        set_post_thumbnail( $post_id, $attach_id );

        echo $titulo . '<br />';
    }