/// <summary>
/// Gets the metadata associated with the specified video.
/// </summary>
public async Task <Video> GetAsync(VideoId id)
{
// We can try to extract video metadata from two sources: mix playlist and the video watch page.
// First is significantly faster but doesn't always work.
try
{
return(await GetVideoFromMixPlaylistAsync(id));
}
catch (Exception ex) when(ex is YoutubeExplodeException || ex is InvalidOperationException)
{
return(await GetVideoFromWatchPageAsync(id));
}
}
/// <summary>
/// Initializes an instance of <see cref="Video"/>.
/// </summary>
public Video(
VideoId id,
string title,
string author,
DateTimeOffset uploadDate,
string description,
TimeSpan duration,
ThumbnailSet thumbnails,
IReadOnlyList <string> keywords,
Engagement engagement)
{
Id = id;
Title = title;
Author = author;
UploadDate = uploadDate;
Description = description;
Duration = duration;
Thumbnails = thumbnails;
Keywords = keywords;
Engagement = engagement;
}
private async Task <Video> GetVideoFromMixPlaylistAsync(VideoId id)
{
var playlistInfo = await PlaylistResponse.GetAsync(_httpClient, "RD" + id.Value);
var video = playlistInfo.GetVideos().First(x => x.GetId() == id.Value);
return(new Video(
id,
video.GetTitle(),
video.GetAuthor(),
video.GetChannelId(),
video.GetUploadDate(),
video.GetDescription(),
video.GetDuration(),
new ThumbnailSet(id),
video.GetKeywords(),
new Engagement(
video.GetViewCount(),
video.GetLikeCount(),
video.GetDislikeCount()
)
));
}
/// <summary>
/// Gets the metadata associated with the specified video.
/// </summary>
public async Task <Video> GetAsync(VideoId id)
{
var videoInfoResponse = await VideoInfoResponse.GetAsync(_httpClient, id);
var playerResponse = videoInfoResponse.GetPlayerResponse();
var watchPage = await WatchPage.GetAsync(_httpClient, id);
return(new Video(
id,
playerResponse.GetVideoTitle(),
playerResponse.GetVideoAuthor(),
playerResponse.GetVideoUploadDate(),
playerResponse.GetVideoDescription(),
playerResponse.GetVideoDuration(),
new ThumbnailSet(id),
playerResponse.GetVideoKeywords(),
new Engagement(
playerResponse.TryGetVideoViewCount() ?? 0,
watchPage.TryGetVideoLikeCount() ?? 0,
watchPage.TryGetVideoDislikeCount() ?? 0
)
));
}
/// <summary>
/// Gets the metadata associated with the specified video.
/// </summary>
public async ValueTask <Video> GetAsync(
VideoId videoId,
CancellationToken cancellationToken = default)
{
var watchPage = await _controller.GetVideoWatchPageAsync(videoId, cancellationToken);
var playerResponse =
watchPage.TryGetPlayerResponse() ??
throw new YoutubeExplodeException("Could not extract player response.");
var title =
playerResponse.TryGetVideoTitle() ??
throw new YoutubeExplodeException("Could not extract video title.");
var channelTitle =
playerResponse.TryGetVideoAuthor() ??
throw new YoutubeExplodeException("Could not extract video author.");
var channelId =
playerResponse.TryGetVideoChannelId() ??
throw new YoutubeExplodeException("Could not extract video channel ID.");
var uploadDate =
playerResponse.TryGetVideoUploadDate() ??
throw new YoutubeExplodeException("Could not extract video upload date.");
var description = playerResponse.TryGetVideoDescription() ?? "";
var duration = playerResponse.TryGetVideoDuration();
var thumbnails = playerResponse
.GetVideoThumbnails()
.Select(t =>
{
var thumbnailUrl =
t.TryGetUrl() ??
throw new YoutubeExplodeException("Could not extract thumbnail URL.");
var thumbnailWidth =
t.TryGetWidth() ??
throw new YoutubeExplodeException("Could not extract thumbnail width.");
var thumbnailHeight =
t.TryGetHeight() ??
throw new YoutubeExplodeException("Could not extract thumbnail height.");
var thumbnailResolution = new Resolution(thumbnailWidth, thumbnailHeight);
return(new Thumbnail(thumbnailUrl, thumbnailResolution));
})
.Concat(Thumbnail.GetDefaultSet(videoId))
.ToArray();
var keywords = playerResponse.GetVideoKeywords();
// Engagement statistics may be hidden
var viewCount = playerResponse.TryGetVideoViewCount() ?? 0;
var likeCount = watchPage.TryGetVideoLikeCount() ?? 0;
var dislikeCount = watchPage.TryGetVideoDislikeCount() ?? 0;
return(new Video(
videoId,
title,
new Author(channelId, channelTitle),
uploadDate,
description,
duration,
thumbnails,
keywords,
new Engagement(viewCount, likeCount, dislikeCount)
));
}
/// <summary>
/// Gets the metadata associated with the specified video.
/// </summary>
public async Task <Video> GetAsync(VideoId id)
{
return(await GetVideoFromWatchPageAsync(id));
}