Movie Render Graph to Server

Development Programming & Scripting
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1

Hello everyone :smiley:

So, while working on a pipeline that uses the Movie Render Graph I noticed something: I could render everything to a local directory, but not to our server. It would render but nothing would be saved.
I added an exposed variable to the graph called ā€œOutputDirā€, but didnā€™t connect it to anything.

Next, I created a Callback for the on_job_finished function in the init_unreal.py and after one day of search (because there is no documentationā€¦) I found out how to get to the variables from the editor overwrites! :slight_smile:

From the job, use the get_or_create_variable_overrides(GraphHere) and in this container, you can search for everything you need. Only thing: For the path you need to use the serialized_string function, else it will be empty. Hope that helps someone!

def get_output_dir(job):
    """
    Extracts the OutputDir path from a Movie Render Pipeline job.
    Returns the clean path as a string without any wrapper syntax.
    """
    try:
        # Get the graph preset and find the OutputDir variable
        graph = job.get_graph_preset()
        if not graph:
            return None
            
        output_dir_var = None
        for variable in graph.get_variables():
            if variable.get_member_name() == "OutputDir":
                output_dir_var = variable
                break
                
        if not output_dir_var:
            return None
            
        # Get the variable assignment container and check if OutputDir is overridden
        var_assignment_container = job.get_or_create_variable_overrides(graph)
        if not var_assignment_container:
            return None
            
        # Make sure overrides are up to date
        if hasattr(var_assignment_container, "update_graph_variable_overrides"):
            var_assignment_container.update_graph_variable_overrides()
            
        # Check if OutputDir override is enabled
        is_enabled = var_assignment_container.get_variable_assignment_enable_state(output_dir_var)
        
        if is_enabled:
            # Get the serialized value and extract the path
            serialized = var_assignment_container.get_value_serialized_string(output_dir_var)
            
            # Extract using regex
            match = re.search(r'Path="([^"]+)"', serialized)
            if match:
                return match.group(1)
            else:
                # Fallback extraction
                return serialized.replace('(Path="', '').replace('")', '')
    except Exception as e:
        unreal.log(f"Error extracting OutputDir: {str(e)}")
        
    return None