decklink-out: add mode support check, limit CreateVideoFrame error spam

nodes/decklink-out/src/decklink_out_node.cpp

@@ -126,6 +126,20 @@ bool DeckLinkOutNode::open_device() {
     callback_ = std::make_unique<OutputCallback>(*this);
     output_->SetScheduledFrameCompletionCallback(callback_.get());
 
+    {
+        BMDDisplayMode actual_mode = bmdModeUnknown;
+        bool supported = false;
+        auto hr = output_->DoesSupportVideoMode(bmdVideoConnectionUnspecified, display_mode_, bmdFormat10BitYUV,
+            bmdNoVideoOutputConversion, bmdSupportedVideoModeDefault, &actual_mode, &supported);
+        if (hr == S_OK) {
+            spdlog::info("DeckLink-out: mode 0x{:x} V210 supported={} actual=0x{:x}",
+                        static_cast<uint32_t>(display_mode_), supported, static_cast<uint32_t>(actual_mode));
+            if (!supported) {
+                spdlog::error("DeckLink-out: display mode not supported for V210 output");
+            }
+        }
+    }
+
     if (output_->EnableVideoOutput(display_mode_, bmdVideoOutputFlagDefault) != S_OK) {
         spdlog::error("DeckLink-out: failed to enable video output");
         return false;
@@ -189,17 +203,22 @@ void DeckLinkOutNode::schedule_frame(void* mxl_payload, long width, long height,
     int32_t out_row_bytes = 0;
     HRESULT row_hr = output_->RowBytesForPixelFormat(bmdFormat10BitYUV, width, &out_row_bytes);
     if (row_hr != S_OK || out_row_bytes <= 0) {
-        spdlog::warn("DeckLink-out: RowBytesForPixelFormat failed hr=0x{:08x}, using fallback", static_cast<uint32_t>(row_hr));
+        spdlog::warn("DeckLink-out: RowBytesForPixelFormat failed hr=0x{:08x}", static_cast<uint32_t>(row_hr));
         out_row_bytes = ((width + 5) / 6) * 16;
     }
-    spdlog::debug("DeckLink-out: creating frame {}x{} row_bytes={}", width, height, out_row_bytes);
 
     IDeckLinkMutableVideoFrame* frame = nullptr;
     HRESULT hr = output_->CreateVideoFrame(width, height, out_row_bytes, bmdFormat10BitYUV,
                                    bmdFrameFlagDefault, &frame);
     if (hr != S_OK || !frame) {
-        spdlog::warn("DeckLink-out: failed to create output frame {}x{} row_bytes={} hr=0x{:08x}",
+        if (create_fail_count_ < 5) {
-                     width, height, out_row_bytes, static_cast<uint32_t>(hr));
+            spdlog::error("DeckLink-out: CreateVideoFrame {}x{} row_bytes={} fmt=V210 hr=0x{:08x}",
+                         width, height, out_row_bytes, static_cast<uint32_t>(hr));
+            create_fail_count_++;
+        }
+        if (create_fail_count_ == 5) {
+            spdlog::error("DeckLink-out: suppressing further CreateVideoFrame errors");
+        }
         return;
     }
 

nodes/decklink-out/src/decklink_out_node.hpp

@@ -57,6 +57,7 @@ private:
     BMDTimeScale time_scale_ = 50000;
 
     std::atomic<bool> playing_{false};
+    int create_fail_count_ = 0;
     bool is_interlaced_ = false;
     long out_width_ = 1920;
     long out_height_ = 1080;