s the alpha value at step 0.   prediction_type (str, defaults to epsilon, optional) —
Prediction type of the scheduler function; can be epsilon (predicts the noise of the diffusion process)
or v_prediction (see section 2.4 of Imagen Video
paper).   timestep_spacing (str, defaults to "leading") —
The way the timesteps should be scaled. Refer to Table 2 of the Common Diffusion Noise Schedules and
Sample Steps are Flawed for more information.   st