优化 复习课切题提示词

VideoAnalysisCore/AICore/GPT/DeepSeek/DeepSeekClient.cs

@@ -154,7 +154,7 @@ namespace VideoAnalysisCore.AICore.GPT.DeepSeek
             var messageBuilder1 = new StringBuilder();
             var lastChat = new ChatResSSE();
             var splitCount = "data:".Length;
-            var maxLoop = 60*1000;
+            var maxLoop = 60*10000;
             int threshold = 0;
             while (maxLoop>0)
             {
@@ -205,6 +205,7 @@ namespace VideoAnalysisCore.AICore.GPT.DeepSeek
                     }
                 }
             }
+            Console.WriteLine(DateTime.Now + "=>AI请求超时 " + chatReq.taskId);
             return null;
         }
 

VideoAnalysisCore/AICore/GPT/DeepSeek/DeepSeekModel.cs

@@ -38,7 +38,7 @@ namespace VideoAnalysisCore.AICore.GPT.DeepSeek
         /// 一种替代温度采样的方法，称为原子核采样， 其中，模型考虑具有top_p概率的标记的结果 质量。所以 0.1 表示仅包含前 10% 概率质量的代币 被考
         /// <para>建议与<see cref="ChatRequest.temperature"/>联动</para>
         /// </summary>
-        public float top_p { get; set; } = 0.5f;
+        public float top_p { get; set; } = 0.1f;
         /// <summary>
         ///  一个对象，用于指定模型必须输出的格式。设置为 enable 结构化输出，确保模型与您提供的 JSON 匹配 图式。
         /// </summary>

VideoAnalysisCore/AICore/GPT/DeepSeek/DeepSeek_GPT.cs

@@ -18,6 +18,7 @@ using static System.Collections.Specialized.BitVector32;
 using FFmpeg.NET.Services;
 using Aliyun.OSS;
 using Yitter.IdGenerator;
+using VideoAnalysisCore.Common.Expand;
 
 namespace VideoAnalysisCore.AICore.GPT.DeepSeek
 {
@@ -172,10 +173,14 @@ namespace VideoAnalysisCore.AICore.GPT.DeepSeek
         {
             //校验结果质量
             var thems = JsonSerializer.Serialize(questionRes.Adapt<VideoKnowQueryDto[]>());
+            var pptFormat = taskInfo.VideoType==AttachmentsInfoType.PPT
+                ? "这堂课是习题课,所讲解内容都是试题。"
+                : string.Empty;
             var checkResFormat = """{"Score":打分(number),"Evaluation":评价(string)""";//,"Data":优化后的分段(array)}""";
             var checkMessage = "我为视频的讲解内容做了一些分段,希望你能通读字幕内容后检查下的分段是否符合我的要求?" +
-               $"检查这些分段的时间是否合理 与相邻的时间段间隔是否处于合理区间30~900秒之间?" +
+               $"检查这些分段的时间是否合理 与相邻的时间段间隔是否大于30秒?" +
                $"分段的主题内容,知识点分配是否合理符合实际吗?" +
+               $"{pptFormat}" +
                $"请给出你的打分(0-100,70分及格)以及打分原因。" +
                $"这是我的分段 {thems}。" +
                $"后续的内容是包含时间戳的视频字幕的固定格式文本。" +
@@ -257,33 +262,39 @@ namespace VideoAnalysisCore.AICore.GPT.DeepSeek
             TotalCaptionsDto captions, string sections)
         {
             var tryCount = 10;
-            while (tryCount-->10)
+            while (tryCount-->0)
             {
                 try
                 {
                     var keyFrameArr = string.IsNullOrEmpty(taskInfo?.PPTVideoCode)
                         ? string.Empty
-                        : $"视频授课内容发生了变化的时间节点{taskInfo.PPTKeyFrame},授课阶段应当在附近时间发生变化。";
+                        : $"图像视频中授课内容PPT发生了变化的时间节点是{taskInfo.PPTKeyFrame},授课阶段结果可以参考这些时间节点。";
                     var resFormat = """[{"StartTime":开始秒(number),"EndTime":结束秒(number),"Stage":阶段(string),"Theme":主题(string),"Content":内容总结(string)}]""";
 
                     var exerciseClass = taskInfo?.VideoType == AttachmentsInfoType.Review
-                        ? $"本堂课是习题课,每个阶段因当是不同得例题讲解片段,并且所有的授课阶段都视为例题精讲。"
+                        ? $"但是本堂课是习题课,所以每个阶段是不同的例题讲解内容。"
-                        : $"完整的课堂标准流程包含以下5个阶段：课程引入/新知讲解/例题精讲/课堂练习/知识总结。" +
+                        : string.Empty;
-                           $"通过授课阶段的主要讲解内容分析出对应的授课阶段内容总结。" +
-                           $"通过生成的内容总结分析出对应的授课阶段主题。 ";
                     //$"请注意 本次分析的视频字幕只是其中一部分 不需要分析出所有类型的授课阶段。";
                     var postMessages =
-                       $"请通过视频字幕内容分析出视频中{taskInfo.Subject}课堂的授课阶段。" +
+                       $"请通过视频字幕内容分析出视频中课堂的授课阶段。" +
-                       $"课堂内容与{sections}章节相关。" +
+                       $"课堂内容与{taskInfo.Subject}学科下的{sections}章节相关。" +
                        $"{keyFrameArr}" +
+                       $"完整的课堂标准流程包含以下5个阶段：课程引入/新知讲解/例题精讲/课堂练习/知识总结。"+
                        $"{exerciseClass}" +
-                       $"最后请检查每个授课阶段的时长,不允许出现超出800秒或者低于50秒的授课阶段。" +
+                       $"通过授课阶段的主要讲解内容分析出对应的授课阶段内容总结。" +
+                       $"通过生成的内容总结分析出对应的授课阶段主题。 "+
+                       $"最后请检查每个授课阶段的时长,不允许出现低于50秒的阶段。" +
                        $"输出内容只返回json格式({resFormat})" +
                        $"字幕格式(开始秒:内容|下一段字幕).以下是包含时间的视频字幕文本。" +
                        $"字幕列表 {captions.Captions} 字幕结束!";
 
                     Console.WriteLine(DateTime.Now + $"=>{taskInfo.Id.ToString()}.开始分析视频内容  {tryCount}");
-                    questionRes.AddRange(await ChatAsync<VideoKnowRes[]>(taskInfo.Id.ToString(), postMessages, "分析字幕"));
+                    var resData = await ChatAsync<VideoKnowRes[]>(taskInfo.Id.ToString(), postMessages, "分析字幕");
+                    if (taskInfo?.VideoType == AttachmentsInfoType.Review)
+                        foreach (var item in resData) 
+                            item.Stage = StageEnum.例题精讲.ToString();
+                    questionRes.AddRange(resData);
+                    break;
                 }
                 catch (Exception ex)
                 {
@@ -305,6 +316,7 @@ namespace VideoAnalysisCore.AICore.GPT.DeepSeek
             {
                 taskId = task,
                 model = model,
+                max_tokens= model== "deepseek-reasoner"?16000:8000,
                 stream = true,
                 temperature = 0.2f,
                 messages = messageArr
@@ -325,13 +337,13 @@ namespace VideoAnalysisCore.AICore.GPT.DeepSeek
                         redisCached[1] = new object[] { chatResp.Value.res, chatResp.Value.u, chatResp.Value.reasoning };
                         RedisExpand.SetTaskGPTCached(task, time, redisCached);
                     }
-                    chatResContent = chatResContent?.Replace("字幕内容", "课堂情况");
+                    chatResContent = chatResContent?.ExtractJsonStrings()?.FirstOrDefault();
                     chatResContent = chatResContent?.Replace("\n", "");
                     chatResContent = chatResContent?.Replace("```json", "");
                     chatResContent = chatResContent?.Replace("```", "");
                     chatResContent = chatResContent?.Replace("}{", "},{");
                     chatResContent = chatResContent?.Replace("}|{", "},{");
-                    chatResContent = chatResContent?.Trim().ExtractJson().FirstOrDefault();
+                    chatResContent = chatResContent?.Trim();
 
                     var startsStr = typeof(T).IsArray ? "[" : "{";
                     var endStr = typeof(T).IsArray ? "]" : "}";
@@ -393,17 +405,21 @@ namespace VideoAnalysisCore.AICore.GPT.DeepSeek
                             .ProcessImageAsync(new SimpleTexOcrRequest(filePath));
                         if (!sRes.Success)
                             continue;
-                        var knowArr=string.Join(',', knowInfoArr.Select(s => s.KnowPointId + "|" + s.KnowPoint ));
+                        if(sRes.Result.res.value.Trim().Length<10)//总试题内容长度小于10 视为无效题目
+                            break;
+                        Console.WriteLine(DateTime.Now + $"=>{taskInfo.Id} 提取{knowInfoArr.First().StartTime}秒试题的试题内容");
+                        Console.WriteLine( sRes.Result.res.value);
+                        var knowArr=JsonSerializer.Serialize(knowInfoArr.Select(s => new { s.KnowPointId, s.KnowPoint }));
                         var resFormat = """[{"TopicStem":string(试题题干),"Question:string(问题)","KnowPointId":(string)知识点ID}]""";
                         var postMessages =
-                           $"提供一段内容是md格式的试题内容字符串。" +
+                           $"我将提供一段内容是md格式的试题内容字符串。" +
-                           $"请提取出其中的试题内容。并且为每个试题关联上在我限定范围内的知识点(多个则用逗号分割)。" +
+                           $"请提取出其中的试题内容以及每个试题的问题。并且为每个试题关联上在我限定范围内的知识点(多个则用逗号分割)。" +
-                           $"知识点格式(知识点ID|知识点名称)范围[{knowArr}]。" +
+                           $"知识点格式(json格式)范围[{knowArr}]。" +
                            $"排除不是试题内容的文字,优化公式排版并且去除题号。" +
-                           $"如果存在多道大题,请帮忙拆分开!" +
+                           $"如果存在多道题(或者小问),则需要拆分成为多个试题对象!" +
                            $"输出内容只返回json格式为({resFormat})" +
                            $"以下是试题内容" +
-                           $"`{sRes.Result.res.info.markdown}`";
+                           $"`{sRes.Result.res.value}`";
                         var resData = await ChatAsync<VideoQuestionOSSDto[]>(taskInfo.Id.ToString(), postMessages, "提取试题", "deepseek-chat");
                         foreach (var q in resData)
                         {

VideoAnalysisCore/Common/AppCommon.cs

@@ -102,50 +102,6 @@ namespace VideoAnalysisCore.Common
             return Path.Combine(task.Id.ToString().LocalPath(), $"{FrameName}{(fTime / 5).ToString().PadLeft(3,'0')}.jpg");
         }
 
-        /// <summary>
-        /// 识别字符串中的json字符串
-        /// </summary>
-        /// <param name="input"></param>
-        /// <returns></returns>
-        public static List<string> ExtractJson(this string input)
-        {
-            List<string> jsonList = new List<string>();
-            int index = 0;
-
-            while (index < input.Length)
-            {
-                if (input[index] == '{' || input[index] == '[')
-                {
-                    int startIndex = index;
-                    int openCount = 1;
-                    index++;
-
-                    while (index < input.Length && openCount > 0)
-                    {
-                        if (input[index] == '{' || input[index] == '[')
-                        {
-                            openCount++;
-                        }
-                        else if (input[index] == '}' || input[index] == ']')
-                        {
-                            openCount--;
-                        }
-                        index++;
-                    }
-
-                    if (openCount == 0)
-                    {
-                        string json = input.Substring(startIndex, index - startIndex);
-                        jsonList.Add(json);
-                    }
-                }
-                else
-                {
-                    index++;
-                }
-            }
-            return jsonList;
-        }
         /// <summary>
         /// 处理数学公式
         /// </summary>

VideoAnalysisCore/Common/AppConfig.cs

@@ -4,6 +4,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using VideoAnalysisCore.Common.Expand;
 
 namespace VideoAnalysisCore.Common
 {

VideoAnalysisCore/Common/Expand/AlibabaCloudVodExpand.cs

@@ -10,9 +10,9 @@ using AlibabaCloud.TeaUtil.Models;
 using Microsoft.Extensions.DependencyInjection;
 using VideoAnalysisCore.Job;
 
-namespace VideoAnalysisCore.Common
+namespace VideoAnalysisCore.Common.Expand
 {
-    public class AlibabaCloudVodConfig 
+    public class AlibabaCloudVodConfig
     {
         /// <summary>
         /// id

VideoAnalysisCore/Common/Expand/AliyunOSSExpand.cs

@@ -18,7 +18,7 @@ using Aliyun.Credentials.Models;
 using VideoAnalysisCore.Model.Dto;
 using System.IO;
 
-namespace VideoAnalysisCore.Common
+namespace VideoAnalysisCore.Common.Expand
 {
     public class AliyunOSSConfig
     {
@@ -65,13 +65,13 @@ namespace VideoAnalysisCore.Common
                 // 必填，请确保代码运行环境设置了环境变量 ALIBABA_CLOUD_ACCESS_KEY_SECRET。
                 AccessKeySecret = AppCommon.Config.AliyunOSS.AccessKeySecret,
                 Endpoint = AppCommon.Config.AliyunOSS.Endpoint,
-                Region= AppCommon.Config.AliyunOSS.Region,
+                Region = AppCommon.Config.AliyunOSS.Region,
             };// 创建ClientConfiguration实例，按照您的需要修改默认参数。
             var conf = new ClientConfiguration();
             // 设置v4签名。
             conf.SignatureVersion = SignatureVersion.V4;
             // 创建OssClient实例。
-            var oss  = new OssClient(config.Endpoint, config.AccessKeyId, config.AccessKeySecret, conf);
+            var oss = new OssClient(config.Endpoint, config.AccessKeyId, config.AccessKeySecret, conf);
             oss.SetRegion(config.Region);
 
             service.AddSingleton(oss);
@@ -81,7 +81,7 @@ namespace VideoAnalysisCore.Common
         /// </summary>
         /// <param name="oss"></param>
         /// <param name="fileArr">视频实体片段</param>
-        public static void AddVideoQuestionUrl(this OssClient oss, List<VideoQuestionOSSDto>  fileArr )
+        public static void AddVideoQuestionUrl(this OssClient oss, List<VideoQuestionOSSDto> fileArr)
         {
             var cached = new HashSet<string>();
             foreach (var item in fileArr)
@@ -89,7 +89,7 @@ namespace VideoAnalysisCore.Common
                 try
                 {
                     var path = item.VideoTaskId.ToString() + "/" + Path.GetFileName(item.FilePath);
-                    if (cached.Contains(item.FilePath)) 
+                    if (cached.Contains(item.FilePath))
                     {
                         item.ImageUrl = AppCommon.Config.AliyunOSS.BucketDomain + "/" + path;
                         continue;

VideoAnalysisCore/Common/Expand/SimpLetexExpand.cs

@@ -7,6 +7,8 @@ using System.Net.Http.Json;
 using System.Net.Sockets;
 using System.Security.Cryptography;
 using System.Text;
+using System.Text.Json.Serialization;
+using System.Text.Json;
 using System.Threading.Tasks;
 using AlibabaCloud.OpenApiClient.Models;
 using AlibabaCloud.SDK.Vod20170321;
@@ -15,10 +17,9 @@ using AlibabaCloud.TeaUtil.Models;
 using Azure;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
-using Newtonsoft.Json;
 using VideoAnalysisCore.Job;
 
-namespace VideoAnalysisCore.Common
+namespace VideoAnalysisCore.Common.Expand
 {
 
 
@@ -32,7 +33,10 @@ namespace VideoAnalysisCore.Common
     public class SimpleTexOcrResponseDataRes
     {
         public string type { get; set; }
-        public SimpleTexOcrResponseDataInfo info { get; set; }
+
+        [JsonPropertyName("info")] // 替换为实际字段名
+        public JsonElement DataInfo { get; set; } // 使用JsonElement接收未知类型
+        public string value { get; set; }
     }
 
     public class SimpleTexOcrResponseDataInfo
@@ -81,6 +85,7 @@ namespace VideoAnalysisCore.Common
     {
         public bool Success { get; set; }
         public SimpleTexOcrResponseData Result { get; set; }
+        public string ResultStr { get; set; }
         public string Error { get; set; }
     }
 
@@ -123,7 +128,7 @@ namespace VideoAnalysisCore.Common
 
             if (request.isolated_formula_wrapper != null)
             {
-                var isolatedWrapper = JsonConvert.SerializeObject(request.isolated_formula_wrapper);
+                var isolatedWrapper = JsonSerializer.Serialize(request.isolated_formula_wrapper);
                 content.Add(new StringContent(isolatedWrapper), nameof(request.isolated_formula_wrapper));
                 parameters[nameof(request.isolated_formula_wrapper)] = isolatedWrapper;
             }
@@ -161,11 +166,25 @@ namespace VideoAnalysisCore.Common
                 var response = await client.SendAsync(requestMessage);
                 var resStr = await response.Content.ReadAsStringAsync();
                 var responseContent = await response.Content.ReadFromJsonAsync<SimpleTexOcrResponseData>();
+                if (responseContent.res.DataInfo.ValueKind == JsonValueKind.Object)
+                {
+                    responseContent.res.value = JsonSerializer.Deserialize<SimpleTexOcrResponseDataInfo>(
+                        responseContent.res.DataInfo.GetRawText(),
+                        new JsonSerializerOptions { PropertyNameCaseInsensitive = true }
+                    )?.markdown??string.Empty;
+                    // 处理字符串
+                }
+                else if (responseContent.res.DataInfo.ValueKind == JsonValueKind.String)
+                {
+                    responseContent.res.value = responseContent.res.DataInfo.GetString();
+                }
+
                 request.file.Dispose();
                 return new SimpleTexOcrResponse
                 {
                     Success = response.IsSuccessStatusCode,
                     Result = responseContent,
+                    ResultStr= resStr,
                     Error = response.IsSuccessStatusCode ? null : $"HTTP Error: {response.StatusCode}"
                 };
             }

VideoAnalysisCore/Common/JsonExtractor.cs

@@ -0,0 +1,105 @@
+using System;
+using System.Collections.Generic;
+using System.Text.Json;
+
+namespace VideoAnalysisCore.Common
+{
+    public static class JsonExtractor
+    {
+        /// <summary>
+        /// 提取json字符串
+        /// </summary>
+        /// <param name="input"></param>
+        /// <returns></returns>
+        public static List<string> ExtractJsonStrings(this string input)
+        {
+            List<string> jsonList = new List<string>();
+            int index = 0;
+            while (index < input.Length)
+            {
+                if (input[index] == '{' || input[index] == '[')
+                {
+                    int? endIndex = FindMatchingBracket(input, index);
+                    if (endIndex.HasValue)
+                    {
+                        string candidate = input.Substring(index, endIndex.Value - index + 1);
+                        if (IsValidJson(candidate))
+                        {
+                            jsonList.Add(candidate);
+                            index = endIndex.Value + 1;
+                            continue;
+                        }
+                    }
+                }
+                index++;
+            }
+            return jsonList;
+        }
+
+        private static int? FindMatchingBracket(string str, int start)
+        {
+            Stack<char> stack = new Stack<char>();
+            bool inString = false;
+            bool inEscape = false;
+
+            for (int i = start; i < str.Length; i++)
+            {
+                char c = str[i];
+
+                if (inEscape)
+                {
+                    inEscape = false;
+                }
+                else if (inString)
+                {
+                    if (c == '\\')
+                        inEscape = true;
+                    else if (c == '"')
+                        inString = false;
+                }
+                else
+                {
+                    switch (c)
+                    {
+                        case '{':
+                        case '[':
+                            stack.Push(c);
+                            break;
+                        case '}':
+                            if (stack.Count == 0 || stack.Peek() != '{')
+                                return null;
+                            stack.Pop();
+                            break;
+                        case ']':
+                            if (stack.Count == 0 || stack.Peek() != '[')
+                                return null;
+                            stack.Pop();
+                            break;
+                        case '"':
+                            inString = true;
+                            break;
+                    }
+                }
+
+                if (stack.Count == 0)
+                    return i;
+            }
+            return null; // 括号未完全匹配
+        }
+
+        public static bool IsValidJson(string candidate)
+        {
+            if (string.IsNullOrEmpty(candidate))
+                return false;
+            try
+            {
+                JsonDocument.Parse(candidate);
+                return true;
+            }
+            catch (Exception)
+            {
+                return false;
+            }
+        }
+    }
+}