Set image settings for each individual File Output Node, in the Python API

Question

In one scene I have two seperate FileOutputNodes and I want different color depths and file formats for each.

In the Blender GUI this is simple. You can press a FileOutputNode, then press N. Then the Properties panel shows and you can change the image settings for each node.

How do I do the same through the python API? I tried creating seperate bpy.types.ImageFormatSettings for each node, but unfortunately that attribute is read-only.

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In particular, I want one node to have Open_EXR, 16-bit RGB; the other PNG 8-bit RGB.

I know I can create two seperate scenes and set the image settings for each scene, but I'd rather have one scene (because that's less code).

Answer 1

You can actually set the settings for each individual node.

Create your node:

file_output_node = tree.nodes.new('CompositorNodeOutputFile')

Then you can set your settings for this node by going into the format attribute. For example:

file_output_node.format.file_format = "PNG" # default is "PNG"
file_output_node.format.color_mode = "RGB"  # default is "BW"
file_output_node.format.color_depth = "16"  # default is 8
file_output_node.format.compression = 0     # default is 15