Update app.py

app.py

@@ -135,7 +135,7 @@ DEFAULT_CANVAS = "960x544 · 16:9 fast"
 FPS, FRAMES_PER_CHUNK, LATENTS_PER_CHUNK = 24, 17, 5
 # It is the *snapped* frame count the ceiling has to hold for: 15 s is 360 frames, which rounds up to 362, i.e.
 # 15.083 s, and is refused.
-MIN_UI_DURATION, MAX_UI_DURATION = 2, 14
+MIN_UI_DURATION, MAX_UI_DURATION = 2, 30
 
 SAMPLERS = {
     "euler": "euler",
@@ -189,6 +189,20 @@ def lower_duration_floor(seconds: float = MIN_UI_DURATION) -> None:
 
     MiniMaxH3ModularPipeline.min_duration = property(lambda self: float(seconds))
 
+
+def raise_duration_ceiling(seconds: float = MAX_UI_DURATION) -> None:
+    """Let the pipeline generate past its 15 s ceiling — experimental, past what MiniMax-H3 was trained/released
+    at. `min_duration`/`max_duration` are the only place either bound is read (`before_denoise.py`'s validation
+    step, `if not min_duration <= duration <= max_duration: raise ValueError`), and nothing architectural depends
+    on the value: MiniMax-H3's RoPE computes `inv_freq` on the fly from arbitrary `position_ids`, not a
+    fixed-size precomputed table, so there's no hard wraparound past 15 s — just untested territory, expect
+    drift, looping, or identity loss rather than a clean extrapolation. Same technique as `lower_duration_floor`,
+    the ceiling side.
+    """
+    from diffusers.modular_pipelines.minimax_h3.modular_pipeline import MiniMaxH3ModularPipeline
+
+    MiniMaxH3ModularPipeline.max_duration = property(lambda self: float(seconds))
+
 # `load_lora_adapter` requires every key (weights and `network_alphas` alike) to share a `prefix` whenever
 # `network_alphas` is passed — `prefix=None` with a non-empty `network_alphas` is a hard error. This string is
 # arbitrary (it's stripped off immediately, and the transformer itself has no `transformer.`-prefixed attribute)
@@ -396,6 +410,7 @@ def load_models() -> str | None:
         from h3_split_blocks import MiniMaxH3GeneratorBlocks
 
         lower_duration_floor()
+        raise_duration_ceiling()
         manager = ComponentsManager()
         blocks = MiniMaxH3GeneratorBlocks()
         print(f"[gen] loading {[c.name for c in blocks.expected_components]} from {MODEL_REPO} ...", flush=True)
@@ -1100,6 +1115,7 @@ with gr.Blocks(title="PlagueKind · MiniMax-H3") as demo:
                     maximum=MAX_UI_DURATION,
                     step=1,
                     value=5,
+                    info="Unstable past 15 seconds.",
                 )
                 steps = gr.Slider(
                     label="Steps",