ffmpeg.c:3076: error: Null Dereference
  pointer `st` last assigned on line 3071 could be null and is dereferenced at line 3076, column 35.

ffmpeg.c:3065:1: start of procedure new_audio_stream()
3063. }
3064. 
3065. static void new_audio_stream(AVFormatContext *oc)
      ^
3066. {
3067.     AVStream *st;

ffmpeg.c:3071:5: 
3069.     int codec_id;
3070. 
3071.     st = av_new_stream(oc, oc->nb_streams);
          ^
3072.     if (!st) {
3073.         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:3072:10: Taking true branch
3070. 
3071.     st = av_new_stream(oc, oc->nb_streams);
3072.     if (!st) {
               ^
3073.         fprintf(stderr, "Could not alloc stream\n");
3074.         av_exit(1);

ffmpeg.c:3073:9: 
3071.     st = av_new_stream(oc, oc->nb_streams);
3072.     if (!st) {
3073.         fprintf(stderr, "Could not alloc stream\n");
              ^
3074.         av_exit(1);
3075.     }

ffmpeg.c:3074:9: Skipping av_exit(): empty list of specs
3072.     if (!st) {
3073.         fprintf(stderr, "Could not alloc stream\n");
3074.         av_exit(1);
              ^
3075.     }
3076.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);

ffmpeg.c:3076:5: 
3074.         av_exit(1);
3075.     }
3076.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);
          ^
3077. 
3078.     bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
