ffmpeg.c:4191: error: Null Dereference
  pointer `today` last assigned on line 4189 could be null and is dereferenced at line 4191, column 69.

ffmpeg.c:4185:1: start of procedure opt_vstats()
4183. }
4184. 
4185. static int opt_vstats(const char *opt, const char *arg)
      ^
4186. {
4187.     char filename[40];

ffmpeg.c:4188:5: 
4186. {
4187.     char filename[40];
4188.     time_t today2 = time(NULL);
          ^
4189.     struct tm *today = localtime(&today2);
4190. 

ffmpeg.c:4189:5: 
4187.     char filename[40];
4188.     time_t today2 = time(NULL);
4189.     struct tm *today = localtime(&today2);
          ^
4190. 
4191.     snprintf(filename, sizeof(filename), "vstats_%02d%02d%02d.log", today->tm_hour, today->tm_min,

ffmpeg.c:4191:5: 
4189.     struct tm *today = localtime(&today2);
4190. 
4191.     snprintf(filename, sizeof(filename), "vstats_%02d%02d%02d.log", today->tm_hour, today->tm_min,
          ^
4192.              today->tm_sec);
4193.     return opt_vstats_file(opt, filename);
