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[Bug] Loss plateau (~0.4) and blurry validation when using Video Sparse Attention (VSA) on Wan2.1-1.3B

Status: Open.

#1092 In hao-ai-lab/FastVideo;

· xiaoxiao0406 opened on Feb 10, 2026

[Feature] FastVideo/SFWan2.2-I2V-A14B-Preview-Diffusers acts like T2V rather than I2V.

Status: Open.

#1086 In hao-ai-lab/FastVideo;

· JoJoistheBestOne opened on Feb 9, 2026

[Feature] Dos VSA support varlen input?

contribution-needed

vsa

Status: Open.

#1040 In hao-ai-lab/FastVideo;

· hanwen-sun opened on Jan 25, 2026

[RFC]: Unified Denoising Engine + Strategy Model

Status: Open.

#1012 In hao-ai-lab/FastVideo;

· SolitaryThinker opened on Jan 15, 2026

[Feature] Selectable vae, text encoder, model in ComfyUI example

questionFurther information is requestedFurther information is requested

Status: Open.

#991 In hao-ai-lab/FastVideo;

· ejamshidiasl opened on Jan 5, 2026

[Feature] When will sparse-distill wan2.1 I2V ready?

wan-distillation-recipe

Status: Open.

#973 In hao-ai-lab/FastVideo;

· kaixinbear opened on Dec 30, 2025

[Feature] Log-linear Sparse Attention

good first issueGood for newcomersGood for newcomers

help wantedExtra attention is neededExtra attention is needed

Status: Open.

#960 In hao-ai-lab/FastVideo;

· SingleZombie opened on Dec 25, 2025

[Feature] Wan2.2-TI2V-5B

wan-distillation-recipe

Status: Open.

#948 In hao-ai-lab/FastVideo;

· zhanglonghao1992 opened on Dec 22, 2025

Lora distillation training bug

lora

Status: Open.

#937 In hao-ai-lab/FastVideo;

· zhanglonghao1992 opened on Dec 16, 2025

[Feature] sparse distillation for txt to audio+video model

enhancementNew feature or requestNew feature or request

Status: Open.

#936 In hao-ai-lab/FastVideo;

· gunjanm608 opened on Dec 15, 2025

[Bug] doesn't work with WSL, rtx5090, cuda 128, 129, 130 etc.

bugSomething isn't workingSomething isn't working

Status: Open.

#919 In hao-ai-lab/FastVideo;

· pagetok opened on Dec 7, 2025

[Feature] Support Variable Length (VarLen) sequences in VSA Kernel

Status: Open.

#917 In hao-ai-lab/FastVideo;

· niyunsheng opened on Dec 5, 2025