Update app.py

app.py

@@ -62,7 +62,7 @@ def generate_video(positive_prompt, negative_prompt, guidance_scale, bias, step,
     print(img_len)
     mask = torch.zeros((1, img_len, pos_len+neg_len)).cuda()
     # mask[:, :, -neg_len:] = -torch.inf # this should be negative
-    mask[:, :, -neg_len:] = bias
+    mask[:, :, -neg_len:] = -bias
 
     for block in pipe.transformer.blocks: 
         block.attn2.processor = WanAttnProcessor2_0(scale=guidance_scale, neg_prompt_length=neg_len, attn_mask=mask)