WordPress at a glance
filter is not described

media_meta filter-hook . WP 2.5.0

Filters the media metadata.

Usage

add_filter( 'media_meta', 'filter_function_name_4836', 10, 2 );
function filter_function_name_4836( $media_dims, $post ){
	// filter...

	return $media_dims;
}
$media_dims(string)
The HTML markup containing the media dimensions.
$post(WP_Post)
The WP_Post attachment object.

Where the hook is called

get_media_item()
get_compat_media_markup()
media_upload_type_form()
wp-admin/includes/media.php 1452
$media_dims = apply_filters( 'media_meta', $media_dims, $post );
wp-admin/includes/media.php 1677
$media_meta = apply_filters( 'media_meta', '', $post );
wp-admin/includes/media.php 2860
$media_dims = apply_filters( 'media_meta', $media_dims, $post );

Where the hook is used (in WP core)

Does not used.