diff --git a/cmvr-es/devices/camera/uvc_camera/src/uvc_camera.cpp b/cmvr-es/devices/camera/uvc_camera/src/uvc_camera.cpp
index bd550303..02342f51 100644
--- a/cmvr-es/devices/camera/uvc_camera/src/uvc_camera.cpp
+++ b/cmvr-es/devices/camera/uvc_camera/src/uvc_camera.cpp
@@ -107,6 +107,9 @@ bool UVCCamera::init() {
         CMVR_LOG(ERROR) << "[UVCCamera] (init): set fps failed";
         return false;
     }
+    if (!cap_.set(cv::CAP_PROP_BUFFERSIZE, 1)) {
+        CMVR_LOG(WARNING) << "[UVCCamera] (init): failed to limit capture buffer size";
+    }
     //初始化编码器
     // 初始化RGB编码器（示例参数：640x480，30fps，H.264）
     if (!CameraStreamEncoder::init(rgbEncoder_, codec_, encode_width_, encode_height_, fps_)) {
@@ -169,6 +172,9 @@ bool UVCCamera::start() {
         CMVR_LOG(ERROR) << "[UVCCamera] (init): set fps failed";
         return false;
     }
+    if (!cap_.set(cv::CAP_PROP_BUFFERSIZE, 1)) {
+        CMVR_LOG(WARNING) << "[UVCCamera] (start): failed to limit capture buffer size";
+    }
     state_.is_opened = true;
     return true;
 }
@@ -224,6 +230,29 @@ void UVCCamera::getRGBImage(cv::Mat& color, Rs2Intrinsics& intrinsics)
 
     {
         std::lock_guard capture_lock(capture_mutex_);
+        if (!state_.is_streaming && !state_.is_recording) {
+            cap_.release();
+            if (!cap_.open(serial_, cv::CAP_V4L2)) {
+                state_.is_error = true;
+                state_.error_message = "failed to reopen camera for snapshot";
+                CMVR_LOG(ERROR) << "[UVCCamera] (getRGBImage): " << state_.error_message;
+                state_.is_opened = false;
+                return;
+            }
+
+            cap_.set(cv::CAP_PROP_FOURCC, cv::VideoWriter::fourcc('M', 'J', 'P', 'G'));
+            cap_.set(cv::CAP_PROP_FRAME_WIDTH, width_);
+            cap_.set(cv::CAP_PROP_FRAME_HEIGHT, height_);
+            cap_.set(cv::CAP_PROP_FPS, fps_);
+            cap_.set(cv::CAP_PROP_BUFFERSIZE, 1);
+
+            if (!cap_.grab()) {
+                state_.is_error = true;
+                state_.error_message = "failed to discard camera startup frame";
+                CMVR_LOG(ERROR) << "[UVCCamera] (getRGBImage): " << state_.error_message;
+                return;
+            }
+        }
         if (!cap_.read(color) || color.empty()) {
             state_.is_error = true;
             state_.error_message = "read color image failed";