NDIReceiver probe fix

shared/NDIReceiver.hpp

@@ -138,26 +138,21 @@ public:
             throw std::runtime_error("NDI source lost");
 
         if (type == NDIlib_frame_type_status_change) {
-            const SourceInfo old = info_;
+            // Don't call probe() here — it would consume a video frame from the queue.
-            info_ = probe();
+            // Format changes are detected on the next actual video frame below.
-            if (info_.width   != old.width  || info_.height  != old.height ||
-                info_.fps_num != old.fps_num || info_.fps_den != old.fps_den) {
-                throw std::runtime_error(
-                    "source format changed: " +
-                    std::to_string(old.width) + "x" + std::to_string(old.height) +
-                    " @" + std::to_string(old.fps_num) + "/" + std::to_string(old.fps_den) +
-                    " -> " +
-                    std::to_string(info_.width) + "x" + std::to_string(info_.height) +
-                    " @" + std::to_string(info_.fps_num) + "/" + std::to_string(info_.fps_den));
-            }
             return FrameKind::None;
         }
 
         if (type == NDIlib_frame_type_video) {
-            switch (info_.fourcc) {
+            // Use the actual frame's FourCC and stride, not the stale values from probe().
+            const auto fourcc  = static_cast<NDIlib_FourCC_type_e>(video_frame.FourCC);
+            const int   stride = video_frame.line_stride_in_bytes > 0
+                                     ? video_frame.line_stride_in_bytes
+                                     : video_frame.xres * bytes_per_pixel(fourcc);
+            switch (fourcc) {
                 case NDIlib_FourCC_type_UYVY:
                     v210::UYVYtoV210(video_frame.p_data, frame_buffer,
-                                     info_.width, info_.height, info_.stride, frame_stride);
+                                     video_frame.xres, video_frame.yres, stride, frame_stride);
                     break;
                 case NDIlib_FourCC_type_P216: {
                     NDIlib_video_frame_v2_t dst{};
@@ -168,7 +163,7 @@ public:
                 }
                 default:
                     NDIlib_recv_free_video_v2(recv_, &video_frame);
-                    throw std::runtime_error("Unsupported NDI color format: " + fourcc_str(info_.fourcc));
+                    throw std::runtime_error("Unsupported NDI color format: " + fourcc_str(fourcc));
             }
             NDIlib_recv_free_video_v2(recv_, &video_frame);
             return FrameKind::Video;