push null texture if footage time is NaN

Fixes #1767

app/node/traverser.cpp

@@ -281,7 +281,7 @@ TexturePtr NodeTraverser::ProcessVideoFootage(const FootageJob &stream, const ra
   Q_UNUSED(input_time)
 
   // Create dummy texture with footage params
-  return std::make_shared<Texture>(stream.video_params());
+  return CreateDummyTexture(stream.video_params());
 }
 
 SampleBufferPtr NodeTraverser::ProcessAudioFootage(const FootageJob& stream, const TimeRange &input_time)
@@ -301,7 +301,7 @@ TexturePtr NodeTraverser::ProcessShader(const Node *node, const TimeRange &range
   // Create dummy texture with sequence params
   VideoParams tex_params = video_params_;
   tex_params.set_channel_count(GetChannelCountFromJob(job));
-  return std::make_shared<Texture>(tex_params);
+  return CreateDummyTexture(tex_params);
 }
 
 SampleBufferPtr NodeTraverser::ProcessSamples(const Node *node, const TimeRange &range, const SampleJob &job)
@@ -321,7 +321,7 @@ TexturePtr NodeTraverser::ProcessFrameGeneration(const Node *node, const Generat
   // Create dummy texture with sequence params
   VideoParams tex_params = video_params_;
   tex_params.set_channel_count(GetChannelCountFromJob(job));
-  return std::make_shared<Texture>(tex_params);
+  return CreateDummyTexture(tex_params);
 }
 
 void NodeTraverser::SaveCachedTexture(const QByteArray &hash, TexturePtr texture)
@@ -396,7 +396,10 @@ void NodeTraverser::PostProcessTable(const Node *node, const Node::ValueHint &hi
       if (job.type() == Track::kVideo) {
         rational footage_time = Footage::AdjustTimeByLoopMode(range.in(), job.loop_mode(), job.length(), job.video_params().video_type(), job.video_params().frame_rate_as_time_base());
 
-        if (!footage_time.isNaN()) {
+        if (footage_time.isNaN()) {
+          // Push dummy texture
+          output_params.Push(NodeValue::kTexture, QVariant::fromValue(CreateDummyTexture(job.video_params())), node, v.array(), v.tag());
+        } else {
           output_params.Push(NodeValue::kTexture, QVariant::fromValue(ProcessVideoFootage(job, footage_time)), node, v.array(), v.tag());
         }
       }
@@ -434,4 +437,9 @@ void NodeTraverser::PostProcessTable(const Node *node, const Node::ValueHint &hi
   }
 }
 
+TexturePtr NodeTraverser::CreateDummyTexture(const VideoParams &p)
+{
+  return std::make_shared<Texture>(p);
+}
+
 }

app/node/traverser.h

@@ -111,6 +111,8 @@ protected:
 private:
   void PostProcessTable(const Node *node, const Node::ValueHint &hint, const TimeRange &range, NodeValueTable &output_params);
 
+  TexturePtr CreateDummyTexture(const VideoParams &p);
+
   VideoParams video_params_;
 
   const QAtomicInt *cancel_;