fix last frame (#116)

scripts/animatediff_latent.py

@@ -1,3 +1,4 @@
+import numpy as np
 import torch
 from modules import images, shared
 from modules.devices import device, dtype_vae, torch_gc
@@ -25,13 +26,17 @@ class AnimateDiffI2VLatent:
         init_alpha[init_alpha < 0] = 0
 
         if params.last_frame is not None:
+            last_frame = params.last_frame
+            if type(last_frame) == str:
+                from modules.api.api import decode_base64_to_image
+                last_frame = decode_base64_to_image(last_frame)
             # Get last_alpha
             last_alpha = [
                 1 - pow(i, params.latent_power_last) / params.latent_scale_last
-                for i in range(params.last_frame)
+                for i in range(params.video_length)
             ]
             last_alpha.reverse()
-            logger.info(f"Randomizing last_latent according to {init_alpha}.")
+            logger.info(f"Randomizing last_latent according to {last_alpha}.")
             last_alpha = torch.tensor(last_alpha, dtype=torch.float32, device=device)[
                 :, None, None, None
             ]
@@ -43,13 +48,18 @@ class AnimateDiffI2VLatent:
             scaling_factor = 1 / sum_alpha[mask_alpha]
             init_alpha[mask_alpha] *= scaling_factor
             last_alpha[mask_alpha] *= scaling_factor
+            init_alpha[0] = 1
+            init_alpha[-1] = 0
+            last_alpha[0] = 0
+            last_alpha[-1] = 1
 
             # Calculate last_latent
-            last_frame = params.last_frame
             if p.resize_mode != 3:
                 last_frame = images.resize_image(
                     p.resize_mode, last_frame, p.width, p.height
-                )[None, ...]
+                )
+                last_frame = np.array(last_frame).astype(np.float32) / 255.0
+                last_frame = np.moveaxis(last_frame, 2, 0)[None, ...]
             last_frame = torch.from_numpy(last_frame).to(device).to(dtype_vae)
             last_latent = images_tensor_to_samples(
                 last_frame,
@@ -64,11 +74,10 @@ class AnimateDiffI2VLatent:
                     size=(p.height // opt_f, p.width // opt_f),
                     mode="bilinear",
                 )
-
             # Modify init_latent
             p.init_latent = (
                 p.init_latent * init_alpha
-                + p.last_latent * last_alpha
+                + last_latent * last_alpha
                 + p.rng.next() * (1 - init_alpha - last_alpha)
             )
         else:

scripts/animatediff_ui.py

@@ -164,7 +164,8 @@ class AnimateDiffUiGroup:
                         label="Optional latent scale for last frame",
                     )
                 self.params.last_frame = gr.Image(
-                    label="[Experiment] Optional last frame. Leave it blank if you do not need one."
+                    label="[Experiment] Optional last frame. Leave it blank if you do not need one.",
+                    type="pil",
                 )
             with gr.Row():
                 unload = gr.Button(