diff --git a/src/main/java/com/genersoft/iot/vmp/aiot/controller/AiRoiController.java b/src/main/java/com/genersoft/iot/vmp/aiot/controller/AiRoiController.java
index 1703edb34..43cc48997 100644
--- a/src/main/java/com/genersoft/iot/vmp/aiot/controller/AiRoiController.java
+++ b/src/main/java/com/genersoft/iot/vmp/aiot/controller/AiRoiController.java
@@ -10,19 +10,18 @@ import com.github.pagehelper.PageInfo;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.tags.Tag;
-import jakarta.servlet.ServletOutputStream;
 import jakarta.servlet.http.HttpServletResponse;
 import lombok.extern.slf4j.Slf4j;
-import org.apache.commons.compress.utils.IOUtils;
+import okhttp3.HttpUrl;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.MediaType;
 import org.springframework.web.bind.annotation.*;
 
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.file.Files;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 
 @Slf4j
 @RestController
@@ -92,40 +91,56 @@ public class AiRoiController {
     @Operation(summary = "获取摄像头截图")
     @GetMapping("/snap")
     public void getSnap(HttpServletResponse resp,
-                        @RequestParam String app,
-                        @RequestParam String stream) {
+                        @RequestParam String url) {
         MediaServer mediaServer = mediaServerService.getDefaultMediaServer();
         if (mediaServer == null) {
+            log.warn("[AI截图] 无可用媒体服务器");
             resp.setStatus(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
             return;
         }
-        String snapDir = "snap" + File.separator + "ai";
-        String fileName = app + "_" + stream + ".jpg";
-        // 调用ZLM截图
-        mediaServerService.getSnap(mediaServer, app, stream, 10, 1, snapDir, fileName);
-        // 等待截图生成
-        File snapFile = new File(snapDir + File.separator + fileName);
-        int retries = 0;
-        while (!snapFile.exists() && retries < 50) {
-            try {
-                Thread.sleep(200);
-            } catch (InterruptedException ignored) {}
-            retries++;
-        }
-        if (!snapFile.exists()) {
-            resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
+        // 直接调用ZLM的getSnap同步接口，传入RTSP源地址
+        String zlmApi = String.format("http://%s:%s/index/api/getSnap",
+                mediaServer.getIp(), mediaServer.getHttpPort());
+        HttpUrl httpUrl = HttpUrl.parse(zlmApi);
+        if (httpUrl == null) {
+            resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
             return;
         }
+        HttpUrl requestUrl = httpUrl.newBuilder()
+                .addQueryParameter("secret", mediaServer.getSecret())
+                .addQueryParameter("url", url)
+                .addQueryParameter("timeout_sec", "15")
+                .addQueryParameter("expire_sec", "1")
+                .build();
+
+        OkHttpClient client = new OkHttpClient.Builder()
+                .connectTimeout(5, TimeUnit.SECONDS)
+                .readTimeout(20, TimeUnit.SECONDS)
+                .build();
+
         try {
-            InputStream in = Files.newInputStream(snapFile.toPath());
-            resp.setContentType(MediaType.IMAGE_JPEG_VALUE);
-            ServletOutputStream outputStream = resp.getOutputStream();
-            IOUtils.copy(in, outputStream);
-            in.close();
-            outputStream.close();
-        } catch (IOException e) {
-            log.warn("[AI截图] 读取截图失败: {}", e.getMessage());
-            resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
+            Request request = new Request.Builder().url(requestUrl).build();
+            Response response = client.newCall(request).execute();
+            if (response.isSuccessful() && response.body() != null) {
+                String contentType = response.header("Content-Type", "");
+                if (contentType.contains("image")) {
+                    resp.setContentType(MediaType.IMAGE_JPEG_VALUE);
+                    byte[] bytes = response.body().bytes();
+                    resp.getOutputStream().write(bytes);
+                    resp.getOutputStream().flush();
+                } else {
+                    // ZLM返回的是JSON错误信息，不是图片
+                    log.warn("[AI截图] ZLM未返回图片，可能流未在线: {}", response.body().string());
+                    resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
+                }
+            } else {
+                log.warn("[AI截图] ZLM请求失败: {} {}", response.code(), response.message());
+                resp.setStatus(HttpServletResponse.SC_BAD_GATEWAY);
+            }
+            response.close();
+        } catch (Exception e) {
+            log.warn("[AI截图] 截图异常: {}", e.getMessage());
+            resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
         }
     }
 }
diff --git a/web/src/api/cameraConfig.js b/web/src/api/cameraConfig.js
index c5a84bff2..cf1021304 100644
--- a/web/src/api/cameraConfig.js
+++ b/web/src/api/cameraConfig.js
@@ -25,6 +25,6 @@ export function stopCamera(id) {
   })
 }
 
-export function getSnapUrl(cameraId) {
-  return `/api/ai/roi/snap?cameraId=${encodeURIComponent(cameraId)}`
+export function getSnapUrl(srcUrl) {
+  return `/api/ai/roi/snap?url=${encodeURIComponent(srcUrl)}`
 }
diff --git a/web/src/views/cameraConfig/roiConfig.vue b/web/src/views/cameraConfig/roiConfig.vue
index d67415239..fea401b3c 100644
--- a/web/src/views/cameraConfig/roiConfig.vue
+++ b/web/src/views/cameraConfig/roiConfig.vue
@@ -113,10 +113,8 @@ export default {
   mounted() {
     this.cameraId = decodeURIComponent(this.$route.params.cameraId)
     this.srcUrl = this.$route.query.srcUrl || ''
-    const app = this.$route.query.app || ''
-    const stream = this.$route.query.stream || ''
-    if (app && stream) {
-      this.snapUrl = `/api/ai/roi/snap?app=${encodeURIComponent(app)}&stream=${encodeURIComponent(stream)}`
+    if (this.srcUrl) {
+      this.snapUrl = `/api/ai/roi/snap?url=${encodeURIComponent(this.srcUrl)}`
     }
     this.loadRois()
   },
@@ -147,10 +145,8 @@ export default {
       this.drawMode = mode
     },
     refreshSnap() {
-      const app = this.$route.query.app || ''
-      const stream = this.$route.query.stream || ''
-      if (app && stream) {
-        this.snapUrl = `/api/ai/roi/snap?app=${encodeURIComponent(app)}&stream=${encodeURIComponent(stream)}&t=${Date.now()}`
+      if (this.srcUrl) {
+        this.snapUrl = `/api/ai/roi/snap?url=${encodeURIComponent(this.srcUrl)}&t=${Date.now()}`
       }
     },
     onRoiDrawn(data) {