Accept section sets directly in director

ltx_director.py

@@ -33,7 +33,7 @@ from .prompt_relay import (
 
 from .patches import detect_model_type, apply_patches
 from .msr_character import MSRCharacterSetData
-from .timeline_nodes import TimelineData
+from .timeline_nodes import TimelineData, TimelineSectionSetData
 
 log = logging.getLogger(__name__)
 
@@ -2044,10 +2044,15 @@ class LTXDirector(io.ComfyNode):
                     optional=True,
                     tooltip="Optional external MSR Character Set. Replaces the legacy inline character panel in the director UI.",
                 ),
+                TimelineSectionSetData.Input(
+                    "section_set",
+                    optional=True,
+                    tooltip="Optional external Timeline Section Set DUMAS payload. When connected, it populates the main timeline track and derives the duration from the sections.",
+                ),
                 TimelineData.Input(
                     "timeline",
                     optional=True,
-                    tooltip="Optional external Timeline DUMAS payload. When connected, it populates the main timeline track and duration.",
+                    tooltip="Legacy external Timeline DUMAS payload kept for backward compatibility with older workflows.",
                 ),
                 io.Float.Input(
                     "start", force_input=True, optional=True, default=0.0,
@@ -2084,7 +2089,7 @@ class LTXDirector(io.ComfyNode):
                 custom_width=768, custom_height=512, resize_method="maintain aspect ratio",
                 divisible_by=32, img_compression=0, audio_vae=None, optional_latent=None,
                 use_custom_audio=False, inpaint_audio=True, use_custom_motion=True, override_audio=False,
-                vae=None, reference_strength=1.0, character_set=None, timeline=None,
+                vae=None, reference_strength=1.0, character_set=None, section_set=None, timeline=None,
                 start=None, end=None, duration=None) -> io.NodeOutput:
         input_dir = folder_paths.get_input_directory()
         image_cache = {}
@@ -2101,9 +2106,15 @@ class LTXDirector(io.ComfyNode):
             processed_image_cache[cache_key] = processed
             return processed
 
-        if timeline is not None:
+        external_timeline_source = None
+        if section_set is not None:
+            external_timeline_source = {"sections": list((section_set or {}).get("sections") or [])}
+        elif timeline is not None:
+            external_timeline_source = timeline
+
+        if external_timeline_source is not None:
             external_tdata, external_local_prompts, external_segment_lengths, external_duration_seconds, external_duration_frames = _build_runtime_timeline_payload(
-                timeline,
+                external_timeline_source,
                 float(frame_rate) if frame_rate else 24.0,
             )
             try: