vc6.0生成时没错，调试时出现unhandled exception in main.exe:0xC0000005:Access Violation求解答

这是代码
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<LIMITS.h>

//src_fileName out_fileName src_width src_height frameNo
int main(int argc,char* argv[])
{
char src_fileName[255];
char out_fileName[255];

int src_width,src_height;
src_width=src_height=0;

int frameNum=INT_MAX;

int src_size,out_size,tem_size;
src_size=out_size=tem_size=0;
unsigned char *src_buf,*out_buf,*tem_buf;

FILE *in_file,*out_file;

unsigned char *Y,*U,*V;
unsigned char *Y2,*U2,*V2;

unsigned char *p=NULL;

if(argc>5)
{
strcpy(src_fileName,argv[1]);
strcpy(out_fileName,argv[2]);
src_width=atoi(argv[3]);
src_height=atoi(argv[4]);
frameNum=atoi(argv[5]);
}
else
{
strcpy(src_fileName,argv[1]);
strcpy(out_fileName,argv[2]);
src_width=atoi(argv[3]);
src_height=atoi(argv[4]);
}

src_size=(src_width*src_height)<<1;//对于YUY2 4:2:2
src_buf=(unsigned char*)malloc(src_size*sizeof(char));
memset(src_buf,0,src_size);

tem_size=(src_width*src_height)<<1;//对于YUV 4：2:2
tem_buf=(unsigned char*)malloc(tem_size*sizeof(char));
memset(tem_buf,0,tem_size);

out_size=src_width*src_height*1.5;//对于YUV 4:2:0
out_buf=(unsigned char*)malloc(out_size*sizeof(char));
memset(out_buf,0,out_size);

in_file=fopen(src_fileName,"rb");
if(!in_file)
{
printf("cannot open input file.");
return 0;
}

out_file=fopen(out_fileName,"wb");
if(!out_file)
{
printf("cannot write 264 file./n");
return 0;
}
while(frameNum>0&&!feof(in_file))
{
//读出一帧数据
if(fread(src_buf,src_size,1,in_file)<=0)
printf("cannot read from input file.");
p=src_buf;

Y=tem_buf;
U=Y+src_width*src_height;
V=U+(src_width*src_height>>1);

Y2=out_buf;
U2=Y2+src_width*src_height;
V2=U2+(src_width*src_height>>2);

/*由打包YUYV变成平板YUV*/
for(int k=0;k<src_height;++k)
{
for(int j=0;j<(src_width>>1);++j)
{
Y[j*2]=p[4*j];
U[j]=p[4*j+1];
Y[j*2+1]=p[4*j+2];
V[j]=p[4*j+2];
}
p=p+src_width*2;

Y=Y+src_width;
U=U+(src_width>>1);
V=V+(src_width>>1);
}

//复位
Y=tem_buf;
U=Y+src_width*src_height;
V=U+(src_width*src_height>>1);

for(int l=0;l<src_height/2;++l)
{
memcpy(U2,U,src_width>>1);
memcpy(V2,V,src_width>>1);

U2=U2+(src_width>>1);
V2=V2+(src_width>>1);

U=U+(src_width);
V=V+(src_width);
}

memcpy(Y2,Y,src_width*src_height);

fwrite(out_buf,sizeof(char),out_size,out_file);
printf(".");

frameNum--;
}

fflush(out_file);

free(src_buf);src_buf=NULL;
free(tem_buf);tem_buf=NULL;
free(out_buf);out_buf=NULL;

fclose(in_file);
fclose(out_file);

return 0;
}