ffmpeg.c:3700: error: Null Dereference
  pointer `streamid_map` last assigned on line 3699 could be null and is dereferenced at line 3700, column 5.

ffmpeg.c:3682:1: start of procedure opt_streamid()
3680. 
3681. /* arg format is "output-stream-index:streamid-value". */
3682. static int opt_streamid(const char *opt, const char *arg)
      ^
3683. {
3684.     int idx;

ffmpeg.c:3688:5: 
3686.     char idx_str[16];
3687. 
3688.     strncpy(idx_str, arg, sizeof(idx_str));
          ^
3689.     idx_str[sizeof(idx_str)-1] = '\0';
3690.     p = strchr(idx_str, ':');

ffmpeg.c:3689:5: 
3687. 
3688.     strncpy(idx_str, arg, sizeof(idx_str));
3689.     idx_str[sizeof(idx_str)-1] = '\0';
          ^
3690.     p = strchr(idx_str, ':');
3691.     if (!p) {

ffmpeg.c:3690:5: 
3688.     strncpy(idx_str, arg, sizeof(idx_str));
3689.     idx_str[sizeof(idx_str)-1] = '\0';
3690.     p = strchr(idx_str, ':');
          ^
3691.     if (!p) {
3692.         fprintf(stderr,

ffmpeg.c:3691:10: Taking false branch
3689.     idx_str[sizeof(idx_str)-1] = '\0';
3690.     p = strchr(idx_str, ':');
3691.     if (!p) {
               ^
3692.         fprintf(stderr,
3693.                 "Invalid value '%s' for option '%s', required syntax is 'index:value'\n",

ffmpeg.c:3697:5: 
3695.         ffmpeg_exit(1);
3696.     }
3697.     *p++ = '\0';
          ^
3698.     idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, MAX_STREAMS-1);
3699.     streamid_map = grow_array(streamid_map, sizeof(*streamid_map), &nb_streamid_map, idx+1);

ffmpeg.c:3698:5: Skipping parse_number_or_die(): empty list of specs
3696.     }
3697.     *p++ = '\0';
3698.     idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, MAX_STREAMS-1);
          ^
3699.     streamid_map = grow_array(streamid_map, sizeof(*streamid_map), &nb_streamid_map, idx+1);
3700.     streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);

ffmpeg.c:3699:5: 
3697.     *p++ = '\0';
3698.     idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, MAX_STREAMS-1);
3699.     streamid_map = grow_array(streamid_map, sizeof(*streamid_map), &nb_streamid_map, idx+1);
          ^
3700.     streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
3701.     return 0;

ffmpeg.c:661:1: start of procedure grow_array()
  659. 
  660. /* similar to ff_dynarray_add() and av_fast_realloc() */
  661. static void *grow_array(void *array, int elem_size, int *size, int new_size)
       ^
  662. {
  663.     if (new_size >= INT_MAX / elem_size) {

ffmpeg.c:663:9: Taking false branch
  661. static void *grow_array(void *array, int elem_size, int *size, int new_size)
  662. {
  663.     if (new_size >= INT_MAX / elem_size) {
               ^
  664.         fprintf(stderr, "Array too big.\n");
  665.         ffmpeg_exit(1);

ffmpeg.c:667:9: Taking true branch
  665.         ffmpeg_exit(1);
  666.     }
  667.     if (*size < new_size) {
               ^
  668.         uint8_t *tmp = av_realloc(array, new_size*elem_size);
  669.         if (!tmp) {

ffmpeg.c:668:9: 
  666.     }
  667.     if (*size < new_size) {
  668.         uint8_t *tmp = av_realloc(array, new_size*elem_size);
               ^
  669.         if (!tmp) {
  670.             fprintf(stderr, "Could not alloc buffer.\n");

libavutil/mem.c:119:1: start of procedure av_realloc()
    117. }
    118. 
    119. void *av_realloc(void *ptr, unsigned int size)
         ^
    120. {
    121. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:126:8: Taking true branch
    124. 
    125.     /* let's disallow possible ambiguous cases */
    126.     if(size > (INT_MAX-16) )
                ^
    127.         return NULL;
    128. 

libavutil/mem.c:127:9: 
    125.     /* let's disallow possible ambiguous cases */
    126.     if(size > (INT_MAX-16) )
    127.         return NULL;
                 ^
    128. 
    129. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:137:1: return from a call to av_realloc
    135.     return realloc(ptr, size);
    136. #endif
    137. }
         ^
    138. 
    139. void av_free(void *ptr)

ffmpeg.c:669:14: Taking true branch
  667.     if (*size < new_size) {
  668.         uint8_t *tmp = av_realloc(array, new_size*elem_size);
  669.         if (!tmp) {
                    ^
  670.             fprintf(stderr, "Could not alloc buffer.\n");
  671.             ffmpeg_exit(1);

ffmpeg.c:670:13: 
  668.         uint8_t *tmp = av_realloc(array, new_size*elem_size);
  669.         if (!tmp) {
  670.             fprintf(stderr, "Could not alloc buffer.\n");
                   ^
  671.             ffmpeg_exit(1);
  672.         }

ffmpeg.c:671:13: Skipping ffmpeg_exit(): empty list of specs
  669.         if (!tmp) {
  670.             fprintf(stderr, "Could not alloc buffer.\n");
  671.             ffmpeg_exit(1);
                   ^
  672.         }
  673.         memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);

ffmpeg.c:673:9: 
  671.             ffmpeg_exit(1);
  672.         }
  673.         memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
               ^
  674.         *size = new_size;
  675.         return tmp;

ffmpeg.c:674:9: 
  672.         }
  673.         memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
  674.         *size = new_size;
               ^
  675.         return tmp;
  676.     }

ffmpeg.c:675:9: 
  673.         memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
  674.         *size = new_size;
  675.         return tmp;
               ^
  676.     }
  677.     return array;

ffmpeg.c:678:1: return from a call to grow_array
  676.     }
  677.     return array;
  678. }
       ^
  679. 
  680. static void choose_sample_fmt(AVStream *st, AVCodec *codec)

ffmpeg.c:3700:5: Skipping parse_number_or_die(): empty list of specs
3698.     idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, MAX_STREAMS-1);
3699.     streamid_map = grow_array(streamid_map, sizeof(*streamid_map), &nb_streamid_map, idx+1);
3700.     streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
          ^
3701.     return 0;
3702. }
