modify readme

Signed-off-by: xujinling <jinling.xu@zilliz.com>

README.md

@@ -33,6 +33,8 @@ towhee.dc(['./demo_video.mp4']) \
         .show()
 
 ```
+<img src="./result1.png" width="800px"/>
+
 - Encode text:
 ```python
 import towhee
@@ -41,6 +43,7 @@ towhee.dc(['kids feeding and playing with the horse']) \
       .video_text_embedding.frozen_in_time(model_name='frozen_in_time_base_16_244', modality='text', device='cpu') \
       .show()
 ```
+<img src="./result2.png" width="800px"/>
 
 *Write a same pipeline with explicit inputs/outputs name specifications:*
 
@@ -48,16 +51,19 @@ towhee.dc(['kids feeding and playing with the horse']) \
 import towhee
 
 towhee.dc['path'](['./demo_video.mp4']) \
-        .video_decode.ffmpeg['path', 'frames'](sample_type='uniform_temporal_subsample', args={'num_samples': 4}) \
-        .runas_op['frames', 'frames'](func=lambda x: [y for y in x]) \
-        .video_text_embedding.frozen_in_time['frames', 'vec'](model_name='frozen_in_time_base_16_244', modality='video', device='cpu') \
-        .show()
+      .video_decode.ffmpeg['path', 'frames'](sample_type='uniform_temporal_subsample', args={'num_samples': 4}) \
+      .runas_op['frames', 'frames'](func=lambda x: [y for y in x]) \
+      .video_text_embedding.frozen_in_time['frames', 'vec'](model_name='frozen_in_time_base_16_244', modality='video', device='cpu') \
+      .select['path', 'vec']() \
+      .show(formatter={'path': 'video_path'})
 
 towhee.dc['text'](["kids feeding and playing with the horse"]) \
       .video_text_embedding.frozen_in_time['text','vec'](model_name='frozen_in_time_base_16_244', modality='text', device='cpu') \
       .select['text', 'vec']() \
       .show()
 ```
+<img src="./result3.png" width="800px"/>
+<img src="./result4.png" width="800px"/>
 
 
 <br />