diff --git a/configs/opensora/inference-long/16x256x256-extend.py b/configs/opensora/inference-long/16x256x256-extend.py
new file mode 100644
index 0000000..cdf8c47
--- /dev/null
+++ b/configs/opensora/inference-long/16x256x256-extend.py
@@ -0,0 +1,55 @@
+# scripts/inference_long.py
+num_frames = 16
+fps = 24 // 3
+image_size = (256, 256)
+
+# Define model
+model = dict(
+    type="STDiT-XL/2",
+    space_scale=0.5,
+    time_scale=1.0,
+    enable_flashattn=True,
+    enable_layernorm_kernel=True,
+    from_pretrained=None,
+)
+vae = dict(
+    type="VideoAutoencoderKL",
+    from_pretrained="stabilityai/sd-vae-ft-ema",
+    micro_batch_size=4,
+)
+text_encoder = dict(
+    type="t5",
+    from_pretrained="DeepFloyd/t5-v1_1-xxl",
+    model_max_length=120,
+)
+scheduler = dict(
+    type="iddpm",
+    # type="dpm-solver",
+    num_sampling_steps=100,
+    cfg_scale=7.0,
+)
+dtype = "fp16"
+
+# Condition
+prompt_path = None
+prompt = [
+    "Drone view of waves crashing against the rugged cliffs along Big Sur’s garay point beach. The crashing blue waters create white-tipped waves, while the golden light of the setting sun illuminates the rocky shore. A small island with a lighthouse sits in the distance, and green shrubbery covers the cliff’s edge. The steep drop from the road down to the beach is a dramatic feat, with the cliff's edges jutting out over the sea. This is a view that captures the raw beauty of the coast and the rugged landscape of the Pacific Coast Highway.",
+    "In an ornate, historical hall, a massive tidal wave peaks and begins to crash. Two surfers, seizing the moment, skillfully navigate the face of the wave.",
+]
+
+loop = 10
+condition_frame_length = 4
+reference_path = [
+    "assets/images/condition/cliff.png",
+    "assets/images/condition/wave.png",
+]
+mask_strategy = [
+    "0,0,0,1,0",
+    "0,0,0,1,0",
+]  # valid when reference_path is not None
+# (loop id, ref id, ref start, length, target start)
+
+# Others
+batch_size = 2
+seed = 42
+save_dir = "./outputs/samples/"