[Torch Compile] Fix torch compile for svd vae (#6217)

src/diffusers/pipelines/stable_video_diffusion/pipeline_stable_video_diffusion.py

@@ -25,7 +25,7 @@ from ...image_processor import VaeImageProcessor
 from ...models import AutoencoderKLTemporalDecoder, UNetSpatioTemporalConditionModel
 from ...schedulers import EulerDiscreteScheduler
 from ...utils import BaseOutput, logging
-from ...utils.torch_utils import randn_tensor
+from ...utils.torch_utils import is_compiled_module, randn_tensor
 from ..pipeline_utils import DiffusionPipeline
 
 
@@ -211,7 +211,8 @@ class StableVideoDiffusionPipeline(DiffusionPipeline):
 
         latents = 1 / self.vae.config.scaling_factor * latents
 
-        accepts_num_frames = "num_frames" in set(inspect.signature(self.vae.forward).parameters.keys())
+        forward_vae_fn = self.vae._orig_mod.forward if is_compiled_module(self.vae) else self.vae.forward
+        accepts_num_frames = "num_frames" in set(inspect.signature(forward_vae_fn).parameters.keys())
 
         # decode decode_chunk_size frames at a time to avoid OOM
         frames = []