update readme with dc2

README.md

@@ -18,47 +18,34 @@ Load a video from path './demo_video.mp4' to generate a video embedding.
 
 Read the text 'kids feeding and playing with the horse' to generate a text embedding. 
 
- *Write the pipeline in simplified style*:
-
 - Encode video (default):
 ```python
-import towhee
-towhee.dc(['./demo_video.mp4']) \
-      .video_decode.ffmpeg() \
-      .video_text_embedding.bridge_former(model_name='frozen_model', modality='video') \
-      .show()
+from towhee.dc2 import pipe, ops, DataCollection
+
+p = (
+    pipe.input('video_path') \
+        .map('video_path', 'video_frames', ops.video_decode.ffmpeg()) \
+        .map('video_frames', 'vec', ops.video_text_embedding.bridge_former(model_name='frozen_model', modality='video')) \
+        .output('video_path', 'video_frames', 'vec')
+)
 
+DataCollection(p('./demo_video.mp4')).show()
 ```
-<img src="./result1.png" width="800px"/>
+<img src="./video_emb_result.png" width="800px"/>
 
 - Encode text:
 ```python
-import towhee
+from towhee.dc2 import pipe, ops, DataCollection
 
-towhee.dc(['kids feeding and playing with the horse']) \
-      .video_text_embedding.bridge_former(model_name='frozen_model', modality='text') \
-      .show()
-```
-<img src="./result2.png" width="800px"/>
+p = (
+    pipe.input('text') \
+        .map('text', 'vec', ops.video_text_embedding.bridge_former(model_name='frozen_model', modality='text')) \
+        .output('text', 'vec')
+)
 
-*Write a same pipeline with explicit inputs/outputs name specifications:*
-
-```python
-import towhee
-
-towhee.dc['path'](['./demo_video.mp4']) \
-      .video_decode.ffmpeg['path', 'frames']() \
-      .video_text_embedding.bridge_former['frames', 'vec'](model_name='frozen_model', modality='video') \
-      .select['path', 'vec']() \
-      .show(formatter={'path': 'video_path'})
-
-towhee.dc['text'](["kids feeding and playing with the horse"]) \
-      .video_text_embedding.bridge_former['text','vec'](model_name='frozen_model', modality='text') \
-      .select['text', 'vec']() \
-      .show()
+DataCollection(p('kids feeding and playing with the horse')).show()
 ```
-<img src="./result3.png" width="800px"/>
-<img src="./result4.png" width="800px"/>
+<img src="./text_emb_result.png" width="800px"/>
 
 
 <br />