get_post_gallery in slider and joining gallery with content

It seems there’s something wrong with how you’ve structured your HTML output so the carousel script thinks the first image is all there is to display. Carefully compare your HTML structure with the carousel documentation example, then adjust your PHP so that it matches.

To prevent the original gallery shortcode from displaying, hook the ‘post_gallery’ filter and return anything but an empty string. What you return will replace the gallery shortcode on output. You could return your carousel output instead of doing so on your template. Then you can mix other content with the shortcode and the gallery will occur in the proper relative position instead of always in the same position. If you are happy with the template positioning, you could simply return ' ' (a single space) to suppress the shortcode output.

If you do want to return your carousel output for the post_gallery filter, you’ll need to collect the output in a single variable instead of echoing out. Either adjust your code or utilize PHP’s output buffer capability.

Thanks man, but I already solved it. I actually changed the whole html and I pot most of the php on my functions.php file.
Here are the codes that I used to make it work as I wanted:
First one(you can put it on any file; content.php. single.php; whereever you need it)

<!-- Carousel -->
<?php if ( get_post_gallery() ) : $gallery = get_post_gallery( get_the_ID(), false ); ?>
<div id="carousel-example-generic" class="carousel slide">
<?php functions_indicators($post) ?>
<!--<div class="carousel-inner">-->
<?php function_slides($post) ?>
<!--</div>-->
<!-- Controls -->
<a class="left carousel-control" href="#carousel-example-generic" data-slide="prev">
<span class="icon-prev"></span>
</a>
<a class="right carousel-control" href="#carousel-example-generic" data-slide="next">
<span class="icon-next"></span>
</a>
</div>
<?php endif; ?>
<!-- /Carousel -->

Here is what you need to put in your functions.php file to make it work with no problem:

// Slider function if a gallery is presented on a post or page
function wp_get_attachment( $attachment_id ) {

    $attachment = get_post( $attachment_id );
    return array(
        'alt' => get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true ),
        'caption' => $attachment->post_excerpt,
        'description' => $attachment->post_content,
        'href' => get_permalink( $attachment->ID ),
        'src' => $attachment->guid,
        'title' => $attachment->post_title
    );
}

function functions_indicators() {
$special_gallery = get_post_gallery( $post, false );
$ids = explode( ",", $special_gallery['ids'] );
$html = '<ol class="carousel-indicators">';
foreach( $ids as $id ) {
    $link   = wp_get_attachment_url( $id );
    $class = ( $i == 0 ) ? 'active ' : '';
    $i++;
    $b=1;
    $html .= '<li data-target="#carousel-example-generic" data-slide-to="'.($i - $b).'" '. 'class="'.$class.'"></li>';
} 
$html .= '</ol>';
echo $html;

}

function function_slides() {
$special_gallery = get_post_gallery( $post, false );
$ids = explode( ",", $special_gallery['ids'] );
$html = '<div class="carousel-inner">';
foreach( $ids as $id ) {
    $link   = wp_get_attachment_url( $id );
    $attachment_meta = wp_get_attachment($id);
    $class = ( $i == 0 ) ? 'active ' : '';
    $i++;
    $html .= '<div class="item '.$class. '"><img src="' . $link . '">' . '<div class="carousel-caption"><h4>'.$attachment_meta['title'].'</h4><p>'.$attachment_meta['description']. '</p></div></div>';
} 
$html .= '</div>';
echo $html;
}

and lastly if you dont want the gallery to be shown twice (the carousel itself and the default WordPress gallery). You just need to put this on your functions.php file as well:

// Join everythin inside content
add_filter('the_content', 'strip_shortcodes');

No problem. Thanks for returning with your solution!