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fix: zero Wan2.2 TI2V timesteps for fixed frames #1604

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Merged
leejet merged 1 commit into from
Jun 3, 2026
Merged

fix: zero Wan2.2 TI2V timesteps for fixed frames #1604

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15 changes: 9 additions & 6 deletions src/stable-diffusion.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1680,12 +1680,15 @@ class StableDiffusionGGML {
const sd::Tensor<float>& init_latent,
const sd::Tensor<float>& denoise_mask) {
if (diffusion_model->get_desc() == "Wan2.2-TI2V-5B") {
auto new_timesteps = std::vector<float>(static_cast<size_t>(init_latent.shape()[2]), timesteps[0]);

if (!denoise_mask.empty()) {
float value = denoise_mask.dim() == 5 ? denoise_mask.index(0, 0, 0, 0, 0) : denoise_mask.index(0, 0, 0, 0);
if (value == 0.f) {
new_timesteps[0] = 0.f;
int64_t frame_count = init_latent.shape()[2];
auto new_timesteps = std::vector<float>(static_cast<size_t>(frame_count), timesteps[0]);

if (!denoise_mask.empty() && denoise_mask.dim() >= 4 && denoise_mask.shape()[2] == frame_count) {
for (int64_t frame = 0; frame < frame_count; ++frame) {
float value = denoise_mask.dim() == 5 ? denoise_mask.index(0, 0, frame, 0, 0) : denoise_mask.index(0, 0, frame, 0);
if (value == 0.f) {
new_timesteps[static_cast<size_t>(frame)] = 0.f;
}
}
}
return new_timesteps;
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