diff --git a/eval/sample.sh b/eval/sample.sh
index cd765ee..d52b667 100644
--- a/eval/sample.sh
+++ b/eval/sample.sh
@@ -169,14 +169,14 @@ function run_video_h() { # 61min
   eval $CMD --ckpt-path $CKPT --save-dir $OUTPUT --sample-name ref_L10C4_${NUM_FRAMES}x240x426 \
     --prompt-path assets/texts/t2v_ref.txt --start-index 0 --end-index 3 \
     --num-frames $NUM_FRAMES --image-size 240 426 \
-    --loop 5 --condition-frame-length 15 \
+    --loop 5 --condition-frame-length 5 \
     --reference-path assets/images/condition/cliff.png assets/images/condition/wave.png assets/images/condition/ship.png \
     --mask-strategy "0" "0" "0" --batch-size $DEFAULT_BS
 
   eval $CMD --ckpt-path $CKPT --save-dir $OUTPUT --sample-name ref_L10C4_${QUAD_FRAMES}x240x426 \
     --prompt-path assets/texts/t2v_ref.txt --start-index 0 --end-index 3 \
     --num-frames $QUAD_FRAMES --image-size 240 426 \
-    --loop 5 --condition-frame-length 60 \
+    --loop 5 --condition-frame-length 10 \
     --reference-path assets/images/condition/cliff.png assets/images/condition/wave.png assets/images/condition/ship.png \
     --mask-strategy "0" "0" "0" --batch-size $DEFAULT_BS
 
diff --git a/opensora/utils/inference_utils.py b/opensora/utils/inference_utils.py
index beb07e4..d2ec784 100644
--- a/opensora/utils/inference_utils.py
+++ b/opensora/utils/inference_utils.py
@@ -175,3 +175,8 @@ def append_generated(vae, generated_video, refs_x, mask_strategy, loop_i, condit
             mask_strategy[j] += ";"
         mask_strategy[j] += f"{loop_i},{len(refs)-1},-{condition_frame_length},0,{condition_frame_length}"
     return refs_x, mask_strategy
+
+
+def dframe_to_frame(num):
+    assert num % 5 == 0, f"Invalid num: {num}"
+    return num // 5 * 17
diff --git a/scripts/inference.py b/scripts/inference.py
index 982994c..aeac0df 100644
--- a/scripts/inference.py
+++ b/scripts/inference.py
@@ -23,6 +23,7 @@ from opensora.utils.inference_utils import (
     get_save_path_name,
     load_prompts,
     prepare_multi_resolution_info,
+    dframe_to_frame,
 )
 from opensora.utils.misc import all_exists, create_logger, is_distributed, is_main_process, to_torch_dtype
 
@@ -210,7 +211,7 @@ def main():
                     save_path = save_paths[idx]
                     video = [video_clips[i][idx] for i in range(loop)]
                     for i in range(1, loop):
-                        video[i] = video[i][:, condition_frame_length:]
+                        video[i] = video[i][:, dframe_to_frame(condition_frame_length) :]
                     video = torch.cat(video, dim=1)
                     save_sample(
                         video,