//////////////////////////////////////////////////////////////
//
//透過分析FFMPEG的資訊，取得影片長度
//
/////////////////////////////////////////////////////////////
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
	FILE *pf;
	int i=0;
	char chrfind[]="Duration:";
	char *pchrget='\0';
	char buf[513];
	char buf0[50],buf1[50],buf2[50],buf3[50],buf4[50],buf5[50];
	int intHr,intMin,intSec,intmSec;
	int intAllSec;
	int intHalfSec;
	//----------------------------
	//__純C一行一行讀取檔案內容_start
	pf=fopen("info1.txt","r");
	while(fgets(buf,512,pf) != NULL)
	//__純C一行一行讀取檔案內容_end
	//----------------------------
	{
		buf[strlen(buf)-1]='\0';//刪除換行
		//printf("%s\n",buf);//直接印出每一行資訊
		//----------------------------
		//__搜尋檔案內有Duration字串_start
		pchrget='\0';
		pchrget=strstr(buf,chrfind);
		if(pchrget!='\0')
		{
			printf("%s\n",buf);
			break;
		}
		//__搜尋檔案內有Duration字串_end
		//----------------------------
	}
	fclose(pf);
	
	//----------------------------
	//__搜尋檔案內有Duration字串_start
	//----------------------------
	//__計算影片長度的一半_start
	sscanf (buf ,"%[^:]:%[^:]:%[^:]:%[^.].%[^,],%s",buf0,buf1,buf2,buf3,buf4,buf5);
	//printf("%s\n%s\n%s\n%s\n",buf1,buf2,buf3,buf4);
	intHr=atoi(buf1);
	intMin=atoi(buf2);
	intSec=atoi(buf3);
	intmSec=atoi(buf4);
	//printf("%d\n%d\n%d\n%d\n",intHr,intMin,intSec,intmSec);
	intAllSec=intHr*60*60+intMin*60+intSec;
	printf("AllSec=%d\n",intAllSec);
	intHalfSec=intAllSec/2;
	printf("HalfSec=%d\n",intHalfSec);
	intHr=intHalfSec/(60*60);
	intMin=(intHalfSec-(intHr*(60*60)))/60;
	intSec=(intHalfSec-(intHr*(60*60))-(intMin*60));
	printf("%d:%d:%d",intHr,intMin,intSec);
	//__計算影片長度的一半_end
	
	return 0;
}