ffmpeg.c:2929: error: Null Dereference
  pointer `st` last assigned on line 2924 could be null and is dereferenced at line 2929, column 35.

ffmpeg.c:2918:1: start of procedure new_video_stream()
2916. }
2917. 
2918. static void new_video_stream(AVFormatContext *oc)
      ^
2919. {
2920.     AVStream *st;

ffmpeg.c:2924:5: 
2922.     int codec_id;
2923. 
2924.     st = av_new_stream(oc, oc->nb_streams);
          ^
2925.     if (!st) {
2926.         fprintf(stderr, "Could not alloc stream\n");

libavformat/utils.c:2245:1: start of procedure av_new_stream()
  2243. }
  2244. 
  2245. AVStream *av_new_stream(AVFormatContext *s, int id)
        ^
  2246. {
  2247.     AVStream *st;

libavformat/utils.c:2250:9: Taking true branch
  2248.     int i;
  2249. 
  2250.     if (s->nb_streams >= MAX_STREAMS)
                ^
  2251.         return NULL;
  2252. 

libavformat/utils.c:2251:9: 
  2249. 
  2250.     if (s->nb_streams >= MAX_STREAMS)
  2251.         return NULL;
                ^
  2252. 
  2253.     st = av_mallocz(sizeof(AVStream));

libavformat/utils.c:2281:1: return from a call to av_new_stream
  2279.     s->streams[s->nb_streams++] = st;
  2280.     return st;
  2281. }
        ^
  2282. 
  2283. AVProgram *av_new_program(AVFormatContext *ac, int id)

ffmpeg.c:2925:10: Taking true branch
2923. 
2924.     st = av_new_stream(oc, oc->nb_streams);
2925.     if (!st) {
               ^
2926.         fprintf(stderr, "Could not alloc stream\n");
2927.         av_exit(1);

ffmpeg.c:2926:9: 
2924.     st = av_new_stream(oc, oc->nb_streams);
2925.     if (!st) {
2926.         fprintf(stderr, "Could not alloc stream\n");
              ^
2927.         av_exit(1);
2928.     }

ffmpeg.c:2927:9: Skipping av_exit(): empty list of specs
2925.     if (!st) {
2926.         fprintf(stderr, "Could not alloc stream\n");
2927.         av_exit(1);
              ^
2928.     }
2929.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_VIDEO);

ffmpeg.c:2929:5: 
2927.         av_exit(1);
2928.     }
2929.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_VIDEO);
          ^
2930.     bitstream_filters[nb_output_files][oc->nb_streams - 1]= video_bitstream_filters;
2931.     video_bitstream_filters= NULL;
