add

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

README.md

@@ -23,8 +23,9 @@ Read the text 'kids feeding and playing with the horse' to generate a text embed
 - Encode video (default):
 ```python
 import towhee
-towhee.glob('./archery.mp4') \
-      .video_decode.ffmpeg() \
+towhee.dc(['./demo_video.mp4']) \
+      .video_decode.ffmpeg(sample_type='uniform_temporal_subsample', args={'num_samples': 4}) \
+      .runas_op(func=lambda x: [y for y in x]) \
       .video_text_embedding.frozen_in_time(model_name='frozen_in_time_base_16_244', modality='video', device='cpu') \
       .show()
 
@@ -46,8 +47,9 @@ towhee.dc(['kids feeding and playing with the horse']) \
 ```python
 import towhee
 
-towhee.glob['path']('./archery.mp4') \
-      .video_decode.ffmpeg['path', 'frames']() \
+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') \
       .select['path', 'vec']() \
       .show(formatter={'path': 'video_path'})