diff --git a/docs/zh_CN/tutorials/wav2lip.md b/docs/zh_CN/tutorials/wav2lip.md
index deee5ef802693c0e5e8f39701f5ca3f7cf714e56..c83fddc1cb5f2d8b16de026713227175586331ef 100644
--- a/docs/zh_CN/tutorials/wav2lip.md
+++ b/docs/zh_CN/tutorials/wav2lip.md
@@ -16,7 +16,7 @@ cd applications
 python tools/wav2lip.py --face ../../imgs/mona7s.mp4 --audio ../../imgs/guangquan.m4a --outfile pp_guangquan_mona7s.mp4
 ```
 **参数说明:**
-- face: 原始视频，视频中都人物都唇形将根据音频进行唇形合成，以和音频同步
+- face: 视频或图片，视频或图片中的人物唇形将根据音频进行唇形合成，以和音频同步
 - audio: 驱动唇形合成的音频，视频中的人物将根据此音频进行唇形合成
 
 ### 2.2 训练
diff --git a/ppgan/datasets/wav2lip_dataset.py b/ppgan/datasets/wav2lip_dataset.py
index fde1fb675de7070537320d02724ca6240960132f..981a4fd5618c08d39a0c36466f814efa88e22948 100644
--- a/ppgan/datasets/wav2lip_dataset.py
+++ b/ppgan/datasets/wav2lip_dataset.py
@@ -34,7 +34,10 @@ def get_image_list(data_root, split):
         for line in f:
             line = line.strip()
             if ' ' in line: line = line.split()[0]
-            filelist.append(os.path.join(data_root, line))
+            video_path = os.path.join(data_root, line)
+            assert os.path.exists(video_path), '{} is not found'.format(
+                video_path)
+            filelist.append(video_path)
 
     return filelist
 
@@ -179,14 +182,6 @@ class Wav2LipDataset(paddle.io.Dataset):
             mel = np.transpose(mel)
             mel = np.expand_dims(mel, 0)
             indiv_mels = np.expand_dims(indiv_mels, 1)
-            #np.random.seed(200)
-            #x = np.random.rand(*x.shape).astype('float32')
-            #np.random.seed(200)
-            #mel = np.random.rand(*mel.shape)
-            #np.random.seed(200)
-            #indiv_mels = np.random.rand(*indiv_mels.shape)
-            #np.random.seed(200)
-            #y = np.random.rand(*y.shape)
 
             return {
                 'x': x,