diff --git a/benchmark.py b/benchmark.py
index 5b11e61..1c55ea5 100644
--- a/benchmark.py
+++ b/benchmark.py
@@ -20,7 +20,7 @@ def main():
     # cal_path为校准文件路径, 每一个设备需要创建/使用一个校准文件
 
     # 方式1: 从视频文件读取
-    sensor = orisys.Sensor("s1_480p.mp4", config_name="./config/prototype_of3_480p.json", cal_path= "./config/dd01a_0_480p.npy", isstitch=True, cuda=False, verbose=True, poisson_backend='cpu')
+    sensor = orisys.Sensor("s1_720p.mp4", config_name="./config/prototype_of3_720p.json", cal_path= "./config/dd01a_0_720p.npy", isstitch=True, cuda=False, verbose=True, poisson_backend="opencl")
 
     # 方式2: 从摄像头读取（取消注释使用） 
     # sensor = orisys.Sensor(0, config_name="./config/prototype_of3.json", cal_path= "./config/cal.npy", isstitch=True, cuda=True, verbose=True)