async void ffmpegAttachmentSupport_AttachmentFoundEvent(AttachmentSupport sender, Attachment attachment)
        {
            //폰트 저장으로 설정되어 있는 경우 폰트를 앱내에 저장
            if (Settings.General.UseSaveFontInMkv)
            {
                if (attachment.MimeType == "application/x-truetype-font")
                {
                    List <KeyValuePair <string, byte[]> > fonts = new List <KeyValuePair <string, byte[]> >();
                    fonts.Add(new KeyValuePair <string, byte[]>(attachment.FileName, attachment.BinaryData));

                    if (fonts != null && fonts.Any())
                    {
                        var resource = ResourceLoader.GetForCurrentView();
                        ShowLoadingBar(string.Format(resource.GetString("Loading"), resource.GetString("FontFamily/Header/Text")) + " " + attachment.FileName);
                        //System.Diagnostics.Debug.WriteLine(attachment.FileName);
                        //await ThreadPool.RunAsync(async handler =>
                        //{
                        await FontHelper.InstallFont(fonts, false);

                        //});
                    }
                }
                //단순 호출 횟수만 카운트
                cntAttachment++;
            }
        }
 void ffmpegAttachmentSupport_AttachmentCompletedEvent(AttachmentSupport sender, UInt32 cbAttachment)
 {
     FontHelper.FireFontFamilyListChanged(cbAttachment);
 }