www.pudn.com > MPEG2SourceCode.rar > getFrame.c

#include  
#include  
#include  
#include "../mpeg.h" 
 
int main(int argc, char *argv[]) 
{ 
    FILE *fp_mpeg,*fp_out; 
    ImageDesc img; 
    unsigned char *pixels; 
    int frameID, frameCounter,moreFrame; 
 
    if(argc!=4)  
    { printf("Usage:  %s  MPEG_file  frameID  output_file\007\n",argv[0]); 
      exit(1); 
     } 
 
    fp_mpeg=fopen(argv[1], "r"); 
    if(fp_mpeg==NULL)  
    { 
    	perror("MPEG source file."); 
    	exit(-1); 
     } 
 
    frameID= atoi(argv[2]); 
    if(frameID<=0) { printf("Error: Invalid frameID: %d\007\n",frameID); 
                     exit(3); 
                   } 
    pixels=(unsigned char *)malloc(img.Size); 
    if(pixels==NULL) 
    { 
    	perror("Memory allocation"); 
    	exit(-1); 
    } 
 
    SetMPEGOption(MPEG_DITHER, FULL_COLOR_DITHER); 
    OpenMPEG(fp_mpeg,& img); 
    printf("MPEG frame Width=%d, Height=%d\n", img.Width, img.Height); 
    frameCounter=0; 
    moreFrame=TRUE; 
    while((frameCounter!=frameID)  && (moreFrame==TRUE)) 
    { 
      moreFrame=GetMPEGFrame(pixels); 
      frameCounter++; 
    } 
    if(frameCounter==frameID) 
    {  fp_out=fopen(argv[3],"w"); 
       if(fp_out==NULL) { perror("output file."); fclose(fp_mpeg);exit(2); } 
       fwrite(pixels,img.Size,1,fp_out); 
       fclose(fp_out); 
       printf("Get Frame OK.\n"); 
    } 
    else 
    { printf("Total %d  frames.\007\n",frameCounter); 
      printf("No more frame available.\n"); 
    } 
    exit(0); 
/*    CloseMPEG();*/ 
/*    fclose(fp_mpeg);*/ 
/*    free(pixels);*/ 
}