ltx model selector

Signed-off-by: Vladimir Mandic <mandic00@live.com>

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Change Log for SD.Next
 
-## Update for 2025-09-23
+## Update for 2025-09-24
 
 - **Models**
   - [WAN 2.2 14B VACE](https://huggingface.co/alibaba-pai/Wan2.2-VACE-Fun-A14B)  
@@ -42,6 +42,7 @@
     accepts optional `page` parameter to search specific networks page  
   - **reference models** additional example images, thanks @liutyi  
   - **video** support for configurable multi-stage models such as WAN-2.2-14B  
+  - **video** new LTX model selection  
 - **Fixes**
   - framepack: add explicit hf-login before framepack load  
   - benchmark: remove forced sampler from system info benchmark  

modules/ltx/ltx_ui.py

@@ -3,17 +3,34 @@ import gradio as gr
 from modules import shared, ui_sections, ui_symbols, ui_common
 from modules.ui_components import ToolButton
 from modules.video_models.video_utils import get_codecs
+from modules.video_models.models_def import models
 from modules.ltx import ltx_process
 
 
 debug = shared.log.trace if os.environ.get('SD_VIDEO_DEBUG', None) is not None else lambda *args, **kwargs: None
 
 
+def load_model(model_name):
+    if model_name is None or model_name == 'None':
+        shared.log.info('LTX model unload')
+        from modules import sd_models
+        sd_models.unload_model_weights()
+        return
+    else:
+        model_instance = [m for m in models['LTX Video'] if m.name == model_name][0]
+        from modules.video_models import video_load
+        video_load.load_model(model_instance)
+
+
 def create_ui(prompt, negative, styles, overrides):
     with gr.Row():
         with gr.Column(variant='compact', elem_id="ltx_settings", elem_classes=['settings-column'], scale=1):
             with gr.Row():
                 generate = gr.Button('Generate', elem_id="ltx_generate_btn", variant='primary', visible=False)
+            with gr.Row():
+                ltx_models = [m.name for m in models['LTX Video']]
+                model = gr.Dropdown(label='LTX model', choices=ltx_models, value=ltx_models[0])
+                model.change(fn=load_model, inputs=[model], outputs=[], show_progress=True)
             with gr.Accordion(open=True, label="LTX size", elem_id='ltx_generate_accordion'):
                 with gr.Row():
                     width, height = ui_sections.create_resolution_inputs('ltx', default_width=832, default_height=480)