private List <Chapter> fetchChapters(AVAsset asset)
{
List <Chapter> chapters = new List <Chapter>();
string[] preferred = NSLocale.PreferredLanguages;
List <string> languages = new List <string>(preferred);
languages.AddRange(asset.AvailableChapterLocales.Select(locale => locale.Identifier));
AVTimedMetadataGroup[] groups = asset.GetChapterMetadataGroupsBestMatchingPreferredLanguages(languages.ToArray());
foreach (AVTimedMetadataGroup group in groups)
{
AVMetadataItem[] item = AVMetadataItem.FilterWithKey(group.Items, NSObject.FromObject("title"), AVMetadata.KeySpaceCommon);
if ((item != null) && (item.Length > 0))
{
Chapter newChapter = new Chapter();
newChapter.StartTime = item[0].Time.Seconds;
if (item[0].StringValue == "Video")
{
newChapter.Type = ChapterType.Video;
}
else if (item[0].StringValue == "Advertisement")
{
newChapter.Type = ChapterType.Advertisement;
}
else
{
newChapter.Type = ChapterType.Unknown;
}
chapters.Add(newChapter);
}
}
return(chapters);
}