How to open Media Player WebVTT caption from isolated storage - windows-phone-8

Question

I have mp4+vtt subtitle video player project on Wp8 c#. I'm look at Microsoft.PlayerFramework.MediaPlayer and WebVTTPlugin, its works perfect:
https://playerframework.codeplex.com/wikipage?title=Closed%20Captions%3a%20WebVTT
im use this code and works perfect. But i have bad luck my project .vtt caption files have "," decimal seperator, this mean my app chrash i need to download subtitle and replace all "," to "." and save isolated storage, i handle it but i cant set caption source to isolated storage because isolated storage is not have uri. I know i cant tell well, i tell it with example:
my caption:
(http://dizilab.com/captions/chuck/sezon-1/tr/2.vtt?v=5.2)
1
00:00:06,600 --> 00:00:10,900
Merhaba. Benim adım Charles Bartowski,
ama bana Chuck diyebilirsiniz.
2
00:00:11,323 --> 00:00:12,711
Bunlar benim ayakkabılarım.
3
00:00:12,771 --> 00:00:14,209
Bu da benim hayatım.
4
00:00:14,249 --> 00:00:19,042
Casuslar, araba takipleri, bilgisayar
çalan ninjalar ve günü kurtaran ben.
its true caption is:
WEBVTT FILE
1
00:00:06.600 --> 00:00:10.900 Merhaba. Benim adım
Charles Bartowski, ama bana Chuck diyebilirsiniz.
2 00:00:11.323 --> 00:00:12.711 Bunlar benim ayakkabılarım.
3 00:00:12.771 --> 00:00:14.209 Bu da benim hayatım.
4 00:00:14.249 --> 00:00:19.042 Casuslar, araba takipleri, bilgisayar
çalan ninjalar ve günü kurtaran ben.
and it is code:
using Microsoft.PlayerFramework.WebVTT;
using System.IO.IsolatedStorage;
using System.IO;
using System.Threading.Tasks;
using Microsoft.PlayerFramework;
namespace PanoramaApp1
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
public string alinanveri="";
public MainPage()
{
InitializeComponent();
Microsoft.PlayerFramework.MediaPlayer player =new Microsoft.PlayerFramework.MediaPlayer();
Microsoft.PlayerFramework.WebVTT.WebVTTPlugin webvttPlugin = new WebVTTPlugin();
Microsoft.PlayerFramework.Caption caption = new Microsoft.PlayerFramework.Caption();
player.IsCaptionSelectionVisible = true;
player.Plugins.Add(webvttPlugin);
altyazikaydet("http://dizilab.com/captions/chuck/sezon-1/tr/2.vtt?v=5.2");
IsolatedStorageFile kayitliDepo = IsolatedStorageFile.GetUserStoreForApplication();
var okuyucu = new StreamReader(new IsolatedStorageFileStream("altyazi.vtt", FileMode.Open, kayitliDepo));
caption.Source = new Uri("i cant use here for access isostorage"); // url points to sample.vtt file
caption.Description = "Türkçe";
player.AvailableCaptions.Add(caption);
player.SelectedCaption = player.AvailableCaptions.FirstOrDefault();
LayoutRoot.Children.Add(player);
player.Source = new Uri("https://redirector.googlevideo.com/videoplayback?requiressl=yes&shardbypass=yes&cmbypass=yes&id=eafe5f42d368b2e0&itag=18&source=picasa&cmo=secure_transport%3Dyes&ip=0.0.0.0&ipbits=0&expire=1420976098&sparams=requiressl,shardbypass,cmbypass,id,itag,source,ip,ipbits,expire&signature=6E257266C2AAADDFC3260B0AADE603F7E421E130.A933FF8365247DEC72A34B71B02FA3B13C57F291&key=lh1", UriKind.RelativeOrAbsolute); // url points to sample.mp4 fil
}
private async void altyazikaydet(string altyaziurl)
{
try
{
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(altyaziurl);
using (var response = (HttpWebResponse)(await Task<WebResponse>.Factory.FromAsync(request.BeginGetResponse, request.EndGetResponse, null)))
{
using (var responseStream = response.GetResponseStream())
{
using (var sr = new StreamReader(responseStream))
{
alinanveri = await sr.ReadToEndAsync();
}
}
}
IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication();
StreamWriter yazici = new StreamWriter(new IsolatedStorageFileStream("altyazi.vtt", FileMode.Create, file));
string x=alinanveri;
x=x.Replace(",0",".0");
x=x.Replace(",1",".1");
x=x.Replace(",2",".2");
x=x.Replace(",3",".3");
x=x.Replace(",4",".4");
x=x.Replace(",5",".5");
x=x.Replace(",6",".6");
x=x.Replace(",7",".7");
x=x.Replace(",8",".8");
x=x.Replace(",9",".9");
x = "WEBVTT FILE" + Environment.NewLine + x;
yazici.WriteLine(x);
yazici.Close();
IsolatedStorageFile kayitliDepo = IsolatedStorageFile.GetUserStoreForApplication();
StreamReader okuyucu = new StreamReader(new IsolatedStorageFileStream("altyazi.vtt", FileMode.Open, kayitliDepo));
string line;
while ((line = okuyucu.ReadLine()) != null)
{
MessageBox.Show(line);
}
}
catch
{
}
}

Answer 1

I had the same problem in Windows UWP.
The player.Source allows an absolute local URI but the webvtt plugin does not.
Finally, I found out how to make it work:
using System.IO;
var caption = new Caption
{
Description = "whatever",
Source = new Uri(Path.Combine("ms-appdata:///Local/", "test.vtt"))
};
Player.AvailableCaptions.Add(caption);
Player.SelectedCaption = Player.AvailableCaptions.FirstOrDefault();

Answer 2

Not sure if this work, but from this article , you could try this
string fullpath = "";
using (IsolatedStorageFile kayitliDepo = IsolatedStorageFile.GetUserStoreForApplication())
{
IsolatedStorageFileStream stream = kayitliDepo.OpenFile("altyazi.vtt", FileMode.Open,FileAccess.Read);
fullpath = stream.Name;
}
caption.Source = new Uri(Name,Urikind.Absolute); // url points to sample.vtt file
caption.Description = "Türkçe";
player.AvailableCaptions.Add(caption);
player.SelectedCaption = player.AvailableCaptions.FirstOrDefault();