C# 下载部分视频直播

Question

我想从直播中下载 10 秒的视频，但是当我这样做时它没有文件输出

cts.Cancel()

。

我正在使用.NET Framework 4.7.2

CancellationTokenSource cts = new CancellationTokenSource();;
...
var httpClient = new HttpClient();
var httpResult = await httpClient.GetAsync("http://.....video.flv", cts.Token);
var resultStream = await httpResult.Content.ReadAsStreamAsync();
var fileStream = File.Create(saveDir);
resultStream.CopyTo(fileStream);

Answer 1

找到了解决方案，我必须将

HttpCompletionOption.ResponseHeadersRead

添加到

GetAsync

并将

cts.Token

添加到

CopyToAsync

using (HttpClient client = new HttpClient())
{
    using (HttpResponseMessage response = await client.GetAsync(videoUrl, HttpCompletionOption.ResponseHeadersRead))
    using (Stream streamToReadFrom = await response.Content.ReadAsStreamAsync())
    {
        using (Stream streamToWriteTo = File.Open(filename, FileMode.Create))
        {
            await streamToReadFrom.CopyToAsync(streamToWriteTo, 81920, cts.Token);
        }
    }
}