diff --git a/shared/DeckLinkReceiver.hpp b/shared/DeckLinkReceiver.hpp
index c463fe5..0f4c8f9 100644
--- a/shared/DeckLinkReceiver.hpp
+++ b/shared/DeckLinkReceiver.hpp
@@ -142,16 +142,20 @@ private:
             IDeckLinkAudioInputPacket* /*audio_packet*/) override
         {
             if (!video_frame) return S_OK;
+
+            IDeckLinkVideoBuffer* buf = nullptr;
+            if (video_frame->QueryInterface(IID_IDeckLinkVideoBuffer, (void**)&buf) != S_OK)
+                return S_OK;
+            buf->StartAccess(bmdBufferAccessRead);
             void* src = nullptr;
-            video_frame->GetBytes(&src);
-            if (!src) return S_OK;
+            buf->GetBytes(&src);
 
-            const uint32_t row_bytes = static_cast<uint32_t>(video_frame->GetRowBytes());
-            const int      fw        = static_cast<int>(video_frame->GetWidth());
-            const int      fh        = static_cast<int>(video_frame->GetHeight());
-            const size_t   sz        = static_cast<size_t>(row_bytes) * static_cast<size_t>(fh);
+            if (src) {
+                const uint32_t row_bytes = static_cast<uint32_t>(video_frame->GetRowBytes());
+                const int      fw        = static_cast<int>(video_frame->GetWidth());
+                const int      fh        = static_cast<int>(video_frame->GetHeight());
+                const size_t   sz        = static_cast<size_t>(row_bytes) * static_cast<size_t>(fh);
 
-            {
                 std::lock_guard<std::mutex> lk(owner.mutex);
                 if (owner.frame_buffer.size() < sz) owner.frame_buffer.resize(sz);
                 std::memcpy(owner.frame_buffer.data(), src, sz);
@@ -160,7 +164,10 @@ private:
                 owner.frame_height    = fh;
                 owner.frame_ready     = true;
             }
-            owner.frame_cv.notify_one();
+
+            buf->EndAccess(bmdBufferAccessRead);
+            buf->Release();
+            if (src) owner.frame_cv.notify_one();
             return S_OK;
         }