If empty frame, not crashes but exists

include/openpose/producer/datumProducer.hpp

@@ -98,7 +98,7 @@ namespace op
                 checkIfTooManyConsecutiveEmptyFrames(mNumberConsecutiveEmptyFrames, datum.cvInputData.empty());
             }
             // Check producer is running
-            if (!datumProducerRunning)
+            if (!datumProducerRunning || datum.cvInputData.empty())
                 datums = nullptr;
             // Increase counter if successful image
             if (datums != nullptr)

src/openpose/producer/producer.cpp

@@ -144,7 +144,9 @@ namespace op
             // Process wrong frames
             if (frame.empty())
             {
-                log("Empty frame detected.", Priority::Max, __LINE__, __FUNCTION__, __FILE__);
+                log("Empty frame detected, frame number " + std::to_string((int)get(CV_CAP_PROP_POS_FRAMES))
+                    + " of " + std::to_string((int)get(CV_CAP_PROP_FRAME_COUNT)) + ".",
+                    Priority::Max, __LINE__, __FUNCTION__, __FILE__);
                 mNumberEmptyFrames++;
             }
             else