Video can be saved without render_pose

Author: gineshidalgo99

include/openpose/wrapper/wrapper.hpp

@@ -456,9 +456,9 @@ namespace op
                       __LINE__, __FUNCTION__, __FILE__);
             if (!renderOutput && (!wrapperStructOutput.writeImages.empty() || !wrapperStructOutput.writeVideo.empty()))
             {
-                const auto message = "In order to save the rendered frames (`write_images` or `write_video`), you must"
-                                     " set `render_output` to true.";
-                error(message, __LINE__, __FUNCTION__, __FILE__);
+                const auto message = "In order to save the rendered frames (`write_images` or `write_video`), you"
+                                     " cannot disable `render_pose`.";
+                log(message, Priority::High);
             }
             if (!wrapperStructOutput.writeHeatMaps.empty() && wrapperStructPose.heatMapTypes.empty())
             {

src/openpose/filestream/videoSaver.cpp

@@ -2,12 +2,14 @@
 
 namespace op
 {
-    VideoSaver::VideoSaver(const std::string& videoSaverPath, const int cvFourcc, const double fps, const Point<int>& cvSize) :
+    VideoSaver::VideoSaver(const std::string& videoSaverPath, const int cvFourcc, const double fps,
+                           const Point<int>& cvSize) :
         VideoSaver::VideoSaver{std::vector<std::string>{videoSaverPath}, cvFourcc, fps, cvSize}
     {
     }
 
-    VideoSaver::VideoSaver(const std::vector<std::string>& videoSaverPaths, const int cvFourcc, const double fps, const Point<int>& cvSize)
+    VideoSaver::VideoSaver(const std::vector<std::string>& videoSaverPaths, const int cvFourcc, const double fps,
+                           const Point<int>& cvSize)
     {
         try
         {
@@ -23,8 +25,10 @@ namespace op
 
                 if (!mVideoWriters.crbegin()->isOpened())
                 {
-                    const std::string errorMessage{"Video to write frames could not be opened on " + videoSaverPath + ". Please, "
-                                                   "check OpenCV is properly compiled with the FFmpeg codecs in order to save video."};
+                    const std::string errorMessage{"Video to write frames could not be opened as `" + videoSaverPath
+                                                   + "`. Please, check that:\n\t1. The path ends in *.avi."
+                                                   "\n\t2. OpenCV is properly compiled with the FFmpeg codecs in"
+                                                   " order to save video."};
                     error(errorMessage, __LINE__, __FUNCTION__, __FILE__);
                 }
             }