62 #include "common/tools_common.h" 
   63 #include "common/video_reader.h" 
   65 static const char *exec_name;
 
   67 void usage_exit(
void) {
 
   68   fprintf(stderr, 
"Usage: %s <infile> <outfile> <N-M|N/M>\n", exec_name);
 
   72 int main(
int argc, 
char **argv) {
 
   76   const AvxInterface *decoder = NULL;
 
   77   AvxVideoReader *reader = NULL;
 
   78   const AvxVideoInfo *info = NULL;
 
   86   if (argc != 4) die(
"Invalid number of arguments.");
 
   88   reader = aom_video_reader_open(argv[1]);
 
   89   if (!reader) die(
"Failed to open %s for reading.", argv[1]);
 
   91   if (!(outfile = fopen(argv[2], 
"wb")))
 
   92     die(
"Failed to open %s for writing.", argv[2]);
 
   94   n = (int)strtol(argv[3], &nptr, 0);
 
   95   m = (int)strtol(nptr + 1, NULL, 0);
 
   96   is_range = (*nptr == 
'-');
 
   97   if (!n || !m || (*nptr != 
'-' && *nptr != 
'/'))
 
   98     die(
"Couldn't parse pattern %s.\n", argv[3]);
 
  100   info = aom_video_reader_get_info(reader);
 
  102   decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
 
  103   if (!decoder) die(
"Unknown input codec.");
 
  108     die_codec(&codec, 
"Failed to initialize decoder.");
 
  110   while (aom_video_reader_read_frame(reader)) {
 
  113     size_t frame_size = 0;
 
  115     const unsigned char *frame =
 
  116         aom_video_reader_get_frame(reader, &frame_size);
 
  119     skip = (is_range && frame_cnt >= n && frame_cnt <= m) ||
 
  120            (!is_range && m - (frame_cnt - 1) % m <= n);
 
  125         die_codec(&codec, 
"Failed to decode frame.");
 
  128         aom_img_write(img, outfile);
 
  136   printf(
"Processed %d frames.\n", frame_cnt);
 
  139   printf(
"Play: ffplay -f rawvideo -pix_fmt yuv420p -s %dx%d %s\n",
 
  140          info->frame_width, info->frame_height, argv[2]);
 
  142   aom_video_reader_close(reader);