[bugfix] Fixed ltx2 base cfg guidance (#1095)

Co-authored-by: Will Lin <wlsaidhi@gmail.com>

examples/inference/basic/basic_ltx2.py

@@ -20,10 +20,10 @@ def main() -> None:
     # Uses FastVideo default sampling settings for LTX2 base.
     generator = VideoGenerator.from_pretrained(
         "Davids048/LTX2-Base-Diffusers",
-        num_gpus=1,
+        num_gpus=8,
     )
 
-    output_path = "outputs_video/ltx2_basic/output_ltx2_base_t2v_1088_1920_1.1.mp4"
+    output_path = "outputs_video/ltx2_basic/output_ltx2_base_t2v_1088_1920_1.4.mp4"
     generator.generate_video(
         prompt=PROMPT,
         output_path=output_path,
@@ -31,6 +31,12 @@ def main() -> None:
         num_frames=121,
         height=1088,
         width=1920,
+        # LTX2 uses these parameters for multi-modal CFG instead of guidance_scale
+        # ltx2_cfg_scale_video=3.0,
+        # ltx2_cfg_scale_audio=7.0,
+        # ltx2_modality_scale_video=3.0,
+        # ltx2_modality_scale_audio=3.0,
+        # ltx2_rescale_scale=0.7,
     )
     generator.shutdown()