text: #ifndef FFMPEG_MP4_TO_FLV_H
  #define FFMPEG_MP4_TO_FLV_H
  
  #include <iostream>
  #include <stdint.h>
  extern "C"{
  #include "libavformat/avformat.h"
  #include "libavutil/timestamp.h"
  }
  
  void mp4_to_flv(const char* input_file, const char* output_file);
  
  void cut_video(const char* ifile, int st, int et, const char* ofile);
  
  #endif
  