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filter is not described

xmlrpc_prepare_media_item filter-hook . WP 3.4.0

Filters XML-RPC-prepared data for the given media item.

Usage

add_filter( 'xmlrpc_prepare_media_item', 'filter_function_name_6704', 10, 3 );
function filter_function_name_6704( $_media_item, $media_item, $thumbnail_size ){
	// filter...

	return $_media_item;
}
$_media_item(array)
An array of media item data.
$media_item(object)
Media item object.
$thumbnail_size(string)
Image size.

Where the hook is called

wp_xmlrpc_server::_prepare_media_item()
wp-includes/class-wp-xmlrpc-server.php 1027
return apply_filters( 'xmlrpc_prepare_media_item', $_media_item, $media_item, $thumbnail_size );

Where the hook is used (in WP core)

Does not used.