ffmpeg.c:2998: error: Null Dereference
  pointer `st` last assigned on line 2993 could be null and is dereferenced at line 2998, column 35.

ffmpeg.c:2987:1: start of procedure new_video_stream()
2985. }
2986. 
2987. static void new_video_stream(AVFormatContext *oc)
      ^
2988. {
2989.     AVStream *st;

ffmpeg.c:2993:5: 
2991.     int codec_id;
2992. 
2993.     st = av_new_stream(oc, oc->nb_streams);
          ^
2994.     if (!st) {
2995.         fprintf(stderr, "Could not alloc stream\n");

libavformat/utils.c:2342:1: start of procedure av_new_stream()
  2340. }
  2341. 
  2342. AVStream *av_new_stream(AVFormatContext *s, int id)
        ^
  2343. {
  2344.     AVStream *st;

libavformat/utils.c:2347:9: Taking true branch
  2345.     int i;
  2346. 
  2347.     if (s->nb_streams >= MAX_STREAMS)
                ^
  2348.         return NULL;
  2349. 

libavformat/utils.c:2348:9: 
  2346. 
  2347.     if (s->nb_streams >= MAX_STREAMS)
  2348.         return NULL;
                ^
  2349. 
  2350.     st = av_mallocz(sizeof(AVStream));

libavformat/utils.c:2381:1: return from a call to av_new_stream
  2379.     s->streams[s->nb_streams++] = st;
  2380.     return st;
  2381. }
        ^
  2382. 
  2383. AVProgram *av_new_program(AVFormatContext *ac, int id)

ffmpeg.c:2994:10: Taking true branch
2992. 
2993.     st = av_new_stream(oc, oc->nb_streams);
2994.     if (!st) {
               ^
2995.         fprintf(stderr, "Could not alloc stream\n");
2996.         av_exit(1);

ffmpeg.c:2995:9: 
2993.     st = av_new_stream(oc, oc->nb_streams);
2994.     if (!st) {
2995.         fprintf(stderr, "Could not alloc stream\n");
              ^
2996.         av_exit(1);
2997.     }

ffmpeg.c:2996:9: Skipping av_exit(): empty list of specs
2994.     if (!st) {
2995.         fprintf(stderr, "Could not alloc stream\n");
2996.         av_exit(1);
              ^
2997.     }
2998.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_VIDEO);

ffmpeg.c:2998:5: 
2996.         av_exit(1);
2997.     }
2998.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_VIDEO);
          ^
2999.     bitstream_filters[nb_output_files][oc->nb_streams - 1]= video_bitstream_filters;
3000.     video_bitstream_filters= NULL;
