Dynamic engine options in UI for blender / ffmpeg (#66)

* Make sure progress UI updates occur on main thread

* Cleanup unnecessary code in FFMPEG

* Cleanup extension matching

* Make sure supported_extensions is now called as a method everywhere

* Fix add_job crashing

* Update the renderer to reflect the current file type

* Sort engine versions from newest to oldest

* Consolidate Project Group and Server Group

* Split UI options into its own file for easier updating

* Add ffmpeg ui stem

src/engines/core/base_engine.py

@@ -47,7 +47,10 @@ class BaseRenderEngine(object):
     def worker_class():  # override when subclassing to link worker class
         raise NotImplementedError("Worker class not implemented")
 
-    def get_help(self):
+    def ui_options(self):  # override to return options for ui
+        return {}
+
+    def get_help(self):  # override if renderer uses different help flag
         path = self.renderer_path()
         if not path:
             raise FileNotFoundError("renderer path not found")
@@ -56,7 +59,7 @@ class BaseRenderEngine(object):
         return help_doc
 
     def get_project_info(self, project_path, timeout=10):
-        raise NotImplementedError(f"get_project_info not implemented for {cls.__name__}")
+        raise NotImplementedError(f"get_project_info not implemented for {self.__name__}")
 
     @classmethod
     def get_output_formats(cls):

src/engines/core/base_worker.py

@@ -47,7 +47,7 @@ class BaseRenderWorker(Base):
                  name=None):
 
         if not ignore_extensions:
-            if not any(ext in input_path for ext in self.engine.supported_extensions):
+            if not any(ext in input_path for ext in self.engine.supported_extensions()):
                 err_meg = f'Cannot find valid project with supported file extension for {self.engine.name()} renderer'
                 logger.error(err_meg)
                 raise ValueError(err_meg)