如何使用azure视频缩略图服务生成视频缩略图？

Question

我正在使用发布方法上传音频/视频/图像。这三个都使用相同的API。对于图像，我能够生成缩略图。现在，我需要帮助生成视频缩略图。有人可以帮我吗？我正在分享图像缩略图的示例：

var queryString = HttpUtility.ParseQueryString(string.Empty);
            queryString["width"] = defaultWidth.ToString();
            queryString["height"] = defaultHeight.ToString();
            queryString["smartCropping"] = "true";
            var uri = $"{thumbnailServiceUri}?{queryString.ToString()}";
            using (var content = new ByteArrayContent(byteData))
            {
                var response = await thumbnailServiceApiClient.PostAsync(uri, content);
                if (response.IsSuccessStatusCode)
                {
                    var thumbnailData = response.Content.ReadAsByteArrayAsync().Result;
                    var blob = new CloudBlockBlob(new Uri(thumbnailStoragePath), storageCreds);
                    await blob.UploadFromByteArrayAsync(thumbnailData, 0, thumbnailData.Length);
                }