error: avutil is required, but compiler can not find it.You should set some environment vars so that compiler can find FFmpeg and other libraries files.For VC compiler, they are INCLUDE and LI
Description:Given an array nums and a value val, remove all instances of that value in-place and return the new length.Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.The or