public TweetMedia(
Uri url,
TweetMediaType type,
ulong userId,
string username,
ulong tweetId,
DateTimeOffset created,
ulong mediaId,
string stem,
string extension,
int index,
int count,
int width,
int height)
{
Url = url;
Type = type;
UserId = userId;
Username = username;
TweetId = tweetId;
Created = created;
MediaId = mediaId;
Stem = stem;
Extension = extension;
Index = index;
Count = count;
Width = width;
Height = height;
}
public TweetMediaViewModel(IMediaEntity model)
{
this.id = model.Id.Value;
this.type = model.VideoDetails == null ? TweetMediaType.Image : TweetMediaType.Video;
if (this.type == TweetMediaType.Video)
{
// Video support has been elided in the view layer for these reasons:
//
// 1. Amazingly, WPF's MediaElement does not support HTTPS.
// See https://connect.microsoft.com/VisualStudio/feedback/details/934355/in-a-wpf-standalone-application-exe-when-the-source-of-a-mediaelement-is-set-to-a-https-uri-it-throws-a-nullreferenceexception.
// 2. Changing the URI to HTTP does not help. The MediaElement fails to load the video, giving an obscure "Exception from HRESULT: 0xC00D11B1".
// Presumably this is because the HTTPS redirects to HTTP, since the videos play fine in Windows Media Player.
// 3. I considered dropping in https://github.com/unosquare/ffmediaelement as an alternative to MediaElement.
// However, the licensing situation is unclear and there were too many bugs related to disposal/memory management.
//
// That said, I have included all the data you need here and left stub code in TweetView.xaml.cs. Feel free to drop in the above control to get videos working.
this.uri = new Uri(model.VideoDetails.Variants[0].URL);
this.aspectRatio = model.VideoDetails.AspectRatio[0] / model.VideoDetails.AspectRatio[1];
}
else
{
this.uri = new Uri(model.MediaURLHttps);
var size = model.Sizes["large"];
this.aspectRatio = size.Width ?? 1d / size.Height ?? 1d;
}
}
