[refactor] unnecessary lines in decode_latents in video pipelines (#6682)

* refactor decode latents in video pipelines

* make fix-copies

Author: a-r-r-o-w

src/diffusers/pipelines/animatediff/pipeline_animatediff.py

@@ -469,18 +469,7 @@ def decode_latents(self, latents):
         latents = latents.permute(0, 2, 1, 3, 4).reshape(batch_size * num_frames, channels, height, width)
 
         image = self.vae.decode(latents).sample
-        video = (
-            image[None, :]
-            .reshape(
-                (
-                    batch_size,
-                    num_frames,
-                    -1,
-                )
-                + image.shape[2:]
-            )
-            .permute(0, 2, 1, 3, 4)
-        )
+        video = image[None, :].reshape((batch_size, num_frames, -1) + image.shape[2:]).permute(0, 2, 1, 3, 4)
         # we always cast to float32 as this does not cause significant overhead and is compatible with bfloat16
         video = video.float()
         return video

src/diffusers/pipelines/animatediff/pipeline_animatediff_video2video.py

@@ -445,18 +445,7 @@ def decode_latents(self, latents):
         latents = latents.permute(0, 2, 1, 3, 4).reshape(batch_size * num_frames, channels, height, width)
 
         image = self.vae.decode(latents).sample
-        video = (
-            image[None, :]
-            .reshape(
-                (
-                    batch_size,
-                    num_frames,
-                    -1,
-                )
-                + image.shape[2:]
-            )
-            .permute(0, 2, 1, 3, 4)
-        )
+        video = image[None, :].reshape((batch_size, num_frames, -1) + image.shape[2:]).permute(0, 2, 1, 3, 4)
         # we always cast to float32 as this does not cause significant overhead and is compatible with bfloat16
         video = video.float()
         return video

src/diffusers/pipelines/pia/pipeline_pia.py

@@ -494,18 +494,7 @@ def decode_latents(self, latents):
         latents = latents.permute(0, 2, 1, 3, 4).reshape(batch_size * num_frames, channels, height, width)
 
         image = self.vae.decode(latents).sample
-        video = (
-            image[None, :]
-            .reshape(
-                (
-                    batch_size,
-                    num_frames,
-                    -1,
-                )
-                + image.shape[2:]
-            )
-            .permute(0, 2, 1, 3, 4)
-        )
+        video = image[None, :].reshape((batch_size, num_frames, -1) + image.shape[2:]).permute(0, 2, 1, 3, 4)
         # we always cast to float32 as this does not cause significant overhead and is compatible with bfloat16
         video = video.float()
         return video

src/diffusers/pipelines/text_to_video_synthesis/pipeline_text_to_video_synth.py

@@ -384,18 +384,7 @@ def decode_latents(self, latents):
         latents = latents.permute(0, 2, 1, 3, 4).reshape(batch_size * num_frames, channels, height, width)
 
         image = self.vae.decode(latents).sample
-        video = (
-            image[None, :]
-            .reshape(
-                (
-                    batch_size,
-                    num_frames,
-                    -1,
-                )
-                + image.shape[2:]
-            )
-            .permute(0, 2, 1, 3, 4)
-        )
+        video = image[None, :].reshape((batch_size, num_frames, -1) + image.shape[2:]).permute(0, 2, 1, 3, 4)
         # we always cast to float32 as this does not cause significant overhead and is compatible with bfloat16
         video = video.float()
         return video

src/diffusers/pipelines/text_to_video_synthesis/pipeline_text_to_video_synth_img2img.py

@@ -461,18 +461,7 @@ def decode_latents(self, latents):
         latents = latents.permute(0, 2, 1, 3, 4).reshape(batch_size * num_frames, channels, height, width)
 
         image = self.vae.decode(latents).sample
-        video = (
-            image[None, :]
-            .reshape(
-                (
-                    batch_size,
-                    num_frames,
-                    -1,
-                )
-                + image.shape[2:]
-            )
-            .permute(0, 2, 1, 3, 4)
-        )
+        video = image[None, :].reshape((batch_size, num_frames, -1) + image.shape[2:]).permute(0, 2, 1, 3, 4)
         # we always cast to float32 as this does not cause significant overhead and is compatible with bfloat16
         video = video.float()
         return video