SourceNode
==========

Overview
--------
Loads images from the Source tab and outputs one or more frames.

Inputs
------
- Offset (Int): Index of the first frame to load

Parameters
----------
- n_frames (constructor): Number of frames to output per compute
- grayscale_mode (constructor): Convert to grayscale if True
- enable_resize (constructor): Downscale images larger than target_size
- target_size (constructor): Max (height, width) for resizing

Outputs
-------
- Image (GrayScaleImage or ColorImage): One output per frame

Example
-------
Set Offset to 10 and n_frames to 3 to output frames 10, 11, and 12.