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fix: ltxv crop guides works with 0 keyframes

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This patch fixes a bug in LTXVCropGuides when the latent has no
keyframes. Additionally, the first frame is always added as a keyframe.
This commit is contained in:
Andrew Kvochko 2025-03-05 13:39:23 +00:00
parent 93fedd92fe
commit c4940b33b0
1 changed files with 2 additions and 5 deletions
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7
comfy_extras/nodes_lt.py
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@ -194,11 +194,6 @@ class LTXVAddGuide:
frame_idx, latent_idx = self.get_latent_index(positive, latent_length, frame_idx, scale_factors)
assert latent_idx + t.shape[2] <= latent_length, "Conditioning frames exceed the length of the latent sequence."
if frame_idx == 0:
latent_image, noise_mask = self.replace_latent_frames(latent_image, noise_mask, t, latent_idx, strength)
return (positive, negative, {"samples": latent_image, "noise_mask": noise_mask},)
num_prefix_frames = min(self._num_prefix_frames, t.shape[2])
positive, negative, latent_image, noise_mask = self.append_keyframe(
@ -252,6 +247,8 @@ class LTXVCropGuides:
noise_mask = get_noise_mask(latent)
_, num_keyframes = get_keyframe_idxs(positive)
if num_keyframes == 0:
return (positive, negative, {"samples": latent_image, "noise_mask": noise_mask},)
latent_image = latent_image[:, :, :-num_keyframes]
noise_mask = noise_mask[:, :, :-num_keyframes]