fix

main.cpp

-#include <iostream>
-extern "C" {
-#include <libavformat/avformat.h>
-}
-#include <string>
-
-int main() {
-    std::cout << "Hello, World!" << std::endl;
-    AVFormatContext *pFormatContext = avformat_alloc_context();
-    std::string path ="/Users/gengen/Downloads/material-design/m1.mp4";
-    if(avformat_open_input(&pFormatContext, path.data(), NULL, NULL) != 0) {
-        std::cout << "open error" << std::endl;
-        return -1; // Couldn't open file
-    }
-
-    if (avformat_find_stream_info(pFormatContext, NULL) < 0) {
-        return -1; // Couldn't find stream information
-    }
-
-    av_dump_format(pFormatContext, 0, path.data(), 0);
-
-//    avformat_close_input(&pFormatContext);
-    return 0;
-}