[U8.1]将在线音频流设置为media元素 [英] [U8.1] Set online audio stream to media element

问题描述

我正在尝试在媒体元素中设置流。这是来自URI的在线音频流（AAC）（例如，无线电流）。问题是我需要从这个流接收元数据，所以我不能直接设置媒体元素的链接。

我必须手动接收流（response.GetResponseStream（）;）并设置它到media元素，但方法SetSource只接受IRandomAccessStream。

我对MediaStreamSource了解不多，请告诉我，有什么更好的方法来解决我的问题？也许有现成的解决方案或示例？

I'm trying to set stream in media element. This is online audio stream (AAC) from URI (radio stream, for example). The problem is that I need receive the metadata from this stream, so I can not set link to media element directly.
I have to receive the stream manually (response.GetResponseStream();) and set it to media element, but the method SetSource only takes IRandomAccessStream.
I don't know much about MediaStreamSource, so tell me, what better way to solve my problem? Perhaps there are ready-made solutions or examples?

推荐答案

嗨安东，

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是的，你是对的，mediaElement的SetSource需要IRandomAccessStream，所以我们需要使用以下代码将流转换为IRandomAccessStream：

Yes, you are right, the mediaElement's SetSource needs the IRandomAccessStream, so we need to convert the stream to the IRandomAccessStream by using the following code:

 private async void Button_Click(object sender, RoutedEventArgs e)
        {
            Stream stream = response.GetResponseStream();
            MemoryStream ms = new MemoryStream();
            stream.CopyTo(ms);
            IRandomAccessStream Adas = await ConvertToRandomAccessStream(ms);
        }
        public static async Task<IRandomAccessStream> ConvertToRandomAccessStream(MemoryStream memoryStream)
        {
            var randomAccessStream = new InMemoryRandomAccessStream();
            var outputStream = randomAccessStream.GetOutputStreamAt(0);
            var dw = new DataWriter(outputStream);
            var task = Task.Factory.StartNew(() => dw.WriteBytes(memoryStream.ToArray()));
            await task;
            await dw.StoreAsync();
            await outputStream.FlushAsync();
            return randomAccessStream;
        }

最好的问候，

Amy Peng < span style ="color：＃0000ff">

Best Regards,
Amy Peng

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