how to convert human3.6m datasets file into txt file？

[UniverseInEyes]

When I downloaded the entire human3.6m data set and tried to run the code, I encountered no such txt format file error. There are only cdf and MP4 format files in the human3.6m data set. May I ask how to convert the human3.6m data set How about converting the relevant dataset file format to txt format?