timesteps error

[zhangyanming-cs]

I used this example for checking, but found that the first time step in ddiminversescheduler is negative(it's -3). Maybe we cannot directly replace the DDIMScheduler with the DDIMInverseScheduler.

[x2x5]

I used this example for checking, but found that the first time step in ddiminversescheduler is negative(it's -3). Maybe we cannot directly replace the DDIMScheduler with the DDIMInverseScheduler.

really? I tried to print the scheduler:

    inverse_scheduler = DDIMInverseScheduler.from_pretrained(
        "stabilityai/stable-diffusion-2-1", subfolder="scheduler"
    )
    ddim_scheduler = DDIMScheduler.from_pretrained(
        "stabilityai/stable-diffusion-2-1", subfolder="scheduler"
    )

and just got 999 to 0 for inverse_scheduler and 0 to 999 for ddim_scheduler:

tensor([999, 998, 997, 996, 995, 994, 993, 992, 991, 990, 989, 988, 987, 986,
...
         19,  18,  17,  16,  15,  14,  13,  12,  11,  10,   9,   8,   7,   6,
          5,   4,   3,   2,   1,   0])

tensor([  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  12,  13,
...
        994, 995, 996, 997, 998, 999])