使用avilib进行avi文件的拆分

#include
#include
#ifdef _WIN32
#include
#else
typedef long DWORD;
#endif
#include "avilib.h"
/*
avi拆分
by notsobad
使用avilib进行avi文件的读写
avi文件的拆分
10秒一个文件
just a simple test

*/
#define TIME_PER_FILE 30                //10s per file
int main(int argc, const char **argv)
{
char * vidbuf = malloc(327680);
char * audbuf = malloc(100000);
long framesize;
    avi_t *avifile;
    avi_t* pAviHandle;   
    int frame;
    int frames;
    int framew = 0;
    int frameh = 0;
    double framerate = 0.0f;

    avifile = AVI_open_input_file("../vp31.avi", 1); //打开源文件
    frames = AVI_video_frames(avifile);
    framew = AVI_video_width(avifile);
    frameh = AVI_video_height(avifile);
    framerate = AVI_frame_rate(avifile);   
                                 
      if (AVI_seek_start( avifile )) //寻找文件开始
      {
             printf("bad seek start\n");            
             return -2;
      }
     int frame_per_file=(int)(framerate*TIME_PER_FILE);
     int i=0;
     int file_list[30];
     int start_name=10000;
     char file_name[50];
     int iskeyframe;//if it's keyframe
     for (frame = 0; frame < frames;frame++)//read and write avi per fream
     {
       
        if((frame%frame_per_file)==0)
        {
                 if(frame!=0) AVI_close(pAviHandle);    //free the avi
                 //printf("frame_per_file is %d\n",frame_per_file);
                 file_list[i]=start_name+TIME_PER_FILE*i;                                                 
                 sprintf(file_name,"%d.avi",file_list[i]);//get the file name
                 //printf("file %d from frame %d name is %s\n",i,frame,file_name);
                 i++;
                 pAviHandle = AVI_open_output_file(file_name);   /* */
                 if(!pAviHandle)
                 {        
                            printf("avi file open failed \n");
                            return -1;
                 }
                AVI_set_video(pAviHandle,framew,frameh,framerate,AVI_video_compressor(avifile));//设置video文件头
                AVI_set_audio(pAviHandle, AVI_audio_channels(avifile),
                                        AVI_audio_rate(avifile),
                                        AVI_audio_bits(avifile),
                                        AVI_audio_format(avifile),
                                        AVI_audio_mp3rate(avifile));//设置audio文件头                                                     
       }//end if
        AVI_set_video_position(avifile, frame);//将avi文件移动到第fream帧
        long audio_bytes=AVI_audio_size(avifile,frame);//get audo size
        AVI_read_frame(avifile,(char *)vidbuf,&iskeyframe);//read fream set video into vidbuf
        AVI_read_audio(avifile, (char *)audbuf,audio_bytes);//set audio into audbuf

       AVI_write_frame(pAviHandle,vidbuf,AVI_frame_size(avifile, frame),iskeyframe);//write video fream by fream
       AVI_write_audio(pAviHandle,audbuf,audio_bytes);//write audio fream by fream     
      } //end for
       free(vidbuf);
       free(audbuf);        
      AVI_close(avifile);   
    return 1;
}