Need to get the URL of uploaded file via extended attribute IN 10.X

I am using glow upload to add the browse file option to upload any file.

 

<div id="captionfile">

<input type="file" name="captionfileContainer">

</div>

 

jQuery("#captionfile").glowUpload({

                uploadUrl:"$core_v2_uploadedFile.GetUploadUrl($contextId)",

                height:50,

                width:200

            });

 

And saving same with the below method.

if(isValid)

            {

                jQuery.telligent.evolution.post({

                    url:"$core_v2_widget.GetExecutedFileUrl('save.vm')",

                    data:{

                        trackName:jQuery('#captionfile').glowUpload('val').name,

                    },

                    success:function(response){

                        window.location.href = "$msd_enhancedBlogUrls.PostList($core_v2_blog.Current.Id)";

                        $('.saveButton').addClass('disabled');

                    },

                    error: function (xhr, desc, ex) { alert(desc); }

                });

            }

 

Saving via Extended Attribute in save.vm.

 

#set($trackName = $core_v2_page.GetFormValue("trackName"))

 

#set($blogPostResponse = $core_v2_blogPost.Create($core_v2_blog.Current.Id, $title, $body, "%{Tags=$tags, IsApproved = $isApproved, PublishedDate = $pubDate, _ExtendedAttributes_videourl=$videourl, _ExtendedAttributes_trackname = $trackName}"))

 

Now I want the url of that file in another page, for which I am follow below approach

#foreach($post in $posts)

            #if($post.ExtendedAttributes.Count > 0)                        

                #foreach($extatrr in $post.ExtendedAttributes)

                    #if($extatrr.key == 'trackname')

                        #set($trackName =  $extatrr.value)

                    #end

                #end

            #end

 

<a  href="javascript:void(0)" id="cta-play-video" role="button" data-pops-up="modal-gate" tabindex="0"  class="videopopup c-action-trigger c-glyph glyph-play overlay-play-icon" track-src="$trackName" >

<img class="img-responsive" src="$msd_enhancedBlogs.GetFeaturedImageUrl($post)" alt="$post.Title"  aria-label="$post.Title" />

</a>

 

#end

 

 

From the above approach I am getting only uploaded file name not the url of that file. Please suggest how I can achieve the same.