Cannot find package 'av'

[PeiJingbobo]

I imported this package into my React Native project using the import statement for usage. However, after the project started, it prompted that the av package could not be found. I want to know if this project is completely written in JavaScript and whether it is compatible with React Native.
The requirement I hope to achieve is to splice multiple short audio clips and play them continuously. Therefore, I need this library to decode MP3 files, splice them together, and then encode them into a new MP3 file. Finally, I will use React Native's player to play the new file. The previous solution was to play multiple audio clips continuously, but the performance on Android was not good. If you have a better solution, please feel free to recommend it.