/// <summary>
/// 根据分片条目创建媒体来源
/// </summary>
/// <param name="video">视频</param>
/// <param name="audio">音频</param>
/// <returns></returns>
public async static Task <MediaSource> CreateMediaSourceAsync(this IVideoService videoService, VideoDashItem video, VideoDashItem audio)
{
try
{
HttpClient httpClient = new HttpClient();
httpClient.DefaultRequestHeaders.Referer = new Uri("https://www.bilibili.com");
httpClient.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36");
var mpdStr = $@"<MPD xmlns=""urn:mpeg:DASH:schema:MPD:2011"" profiles=""urn:mpeg:dash:profile:isoff-on-demand:2011"" type=""static"">
<Period start=""PT0S"">
<AdaptationSet>
<ContentComponent contentType=""video"" id=""1"" />
<Representation bandwidth=""{video.bandwidth}"" codecs=""{video.codecs}"" height=""{video.height}"" id=""{video.id}"" mimeType=""{video.mimeType}"" width=""{video.width}"">
<BaseURL></BaseURL>
<SegmentBase indexRange=""{video.segment_base.index_range}"">
<Initialization range=""{video.segment_base.initialization}"" />
</SegmentBase>
</Representation>
</AdaptationSet>
{{audio}}
</Period>
</MPD>
";
if (audio == null)
{
mpdStr = mpdStr.Replace("{audio}", "");
}
else
{
mpdStr = mpdStr.Replace("{audio}", $@"<AdaptationSet>
<ContentComponent contentType=""audio"" id=""2"" />
<Representation bandwidth=""{audio.bandwidth}"" codecs=""{audio.codecs}"" id=""{audio.id}"" mimeType=""{audio.mimeType}"" >
<BaseURL></BaseURL>
<SegmentBase indexRange=""{audio.segment_base.index_range}"">
<Initialization range=""{audio.segment_base.initialization}"" />
</SegmentBase>
</Representation>
</AdaptationSet>");
}
var stream = new MemoryStream(Encoding.UTF8.GetBytes(mpdStr)).AsInputStream();
var soure = await AdaptiveMediaSource.CreateFromStreamAsync(stream, new Uri(video.baseUrl), "application/dash+xml", httpClient);
var s = soure.Status;
soure.MediaSource.DownloadRequested += (sender, args) =>
{
if (args.ResourceContentType == "audio/mp4" && audio != null)
{
args.Result.ResourceUri = new Uri(audio.baseUrl);
}
};
return(MediaSource.CreateFromAdaptiveMediaSource(soure.MediaSource));
}
catch (Exception)
{
return(null);
}
}