On library import in ESP-IDF

I am try to import USB Camera(libuvc) Library in my Project but when I am import this Library I am getting error.And i can’t able to compile this code.Can any one Please help me

There’s not enough information in your post to help you at all. Please upload a minimal project that fails to compile after you’ve attempted to import libuvc in it.

i can’t able to download this ESP_TIMER.h library from github

You don’t seem to be able to be using PlatformIO at all? That’s the native ESP-IDF build system.