diff --git a/components/vision/port/maixcam/maix_camera_mmf.cpp b/components/vision/port/maixcam/maix_camera_mmf.cpp
index 2c59f765..9a59bfeb 100644
--- a/components/vision/port/maixcam/maix_camera_mmf.cpp
+++ b/components/vision/port/maixcam/maix_camera_mmf.cpp
@@ -358,16 +358,14 @@ namespace maix::camera
                 sys_cfg.vb_pool[0].count = 3;
                 sys_cfg.vb_pool[0].map = 2;
                 sys_cfg.max_pool_cnt = 1;
+
+                stIniCfg.enSnsType[0] = GCORE_GC4653_MIPI_720P_60FPS_10BIT;
             } else {
                 sys_cfg.vb_pool[0].size = 2560 * 1440 * 3 / 2;
                 sys_cfg.vb_pool[0].count = 2;
                 sys_cfg.vb_pool[0].map = 2;
                 sys_cfg.max_pool_cnt = 1;
-            }
 
-            if (width <= 1280 && height <= 720 && fps > 30) {
-                stIniCfg.enSnsType[0] = GCORE_GC4653_MIPI_720P_60FPS_10BIT;
-            } else {
                 stIniCfg.enSnsType[0] = GCORE_GC4653_MIPI_4M_30FPS_10BIT;
             }
             stIniCfg.as8PNSwap[0][0] = 0;
@@ -452,7 +450,7 @@ namespace maix::camera
         // mmf init
         err::check_bool_raise(!_mmf_vi_init(_width, _height, _fps), "mmf vi init failed");
         err::check_bool_raise((_ch = mmf_get_vi_unused_channel()) >= 0, "mmf get vi channel failed");
-        if (0 != mmf_add_vi_channel_v2(_ch, _width, _height, mmf_invert_format_to_mmf(_format_impl), _fps, 2, -1, -1, 2, 3)) {
+        if (0 != mmf_add_vi_channel_v2(_ch, _width, _height, mmf_invert_format_to_mmf(_format_impl), _fps, _buff_num, -1, -1, 2, _buff_num)) {
             mmf_vi_deinit();
             mmf_deinit_v2(false);
             err::check_raise(err::ERR_RUNTIME, "mmf add vi channel failed");
diff --git a/examples/jpg_stream_demo/main/src/main.cpp b/examples/jpg_stream_demo/main/src/main.cpp
index 65339f4a..aee7fdfc 100644
--- a/examples/jpg_stream_demo/main/src/main.cpp
+++ b/examples/jpg_stream_demo/main/src/main.cpp
@@ -9,7 +9,27 @@ extern std::string html;
 
 int _main(int argc, char* argv[])
 {
-    camera::Camera cam = camera::Camera(320, 240);
+    int cam_w = -1;
+    int cam_h = -1;
+    image::Format cam_fmt = image::Format::FMT_RGB888;
+    int cam_fps = -1;
+    int cam_buffer_num = 3;
+    if (argc > 1) {
+        if (!strcmp(argv[1], "-h")) {
+            log::info("./camera_display <width> <height> <format> <fps> <buff_num>");
+            log::info("example: ./camera_display 640 480 0 60 2");
+            exit(0);
+        } else {
+            cam_w = atoi(argv[1]);
+        }
+    }
+    if (argc > 2) cam_h = atoi(argv[2]);
+    if (argc > 3) cam_fmt = (image::Format)atoi(argv[3]);
+    if (argc > 4) cam_fps = atoi(argv[4]);
+    if (argc > 5) cam_buffer_num = atoi(argv[5]);
+    log::info("Camera width:%d height:%d format:%s fps:%d buffer_num:%d", cam_w, cam_h, image::fmt_names[cam_fmt].c_str(), cam_fps, cam_buffer_num);
+
+    camera::Camera cam = camera::Camera(cam_w, cam_h, cam_fmt, "", cam_fps, cam_buffer_num);
     display::Display disp = display::Display();
     log::info("camera and display open success\n");
     log::info("camera size: %dx%d\n", cam.width(), cam.height());