ffmpeg.c:3163: error: Null Dereference
  pointer `st` last assigned on line 3158 could be null and is dereferenced at line 3163, column 35.

ffmpeg.c:3152:1: start of procedure new_audio_stream()
3150. }
3151. 
3152. static void new_audio_stream(AVFormatContext *oc)
      ^
3153. {
3154.     AVStream *st;

ffmpeg.c:3158:5: 
3156.     int codec_id;
3157. 
3158.     st = av_new_stream(oc, oc->nb_streams);
          ^
3159.     if (!st) {
3160.         fprintf(stderr, "Could not alloc stream\n");

libavformat/utils.c:2338:1: start of procedure av_new_stream()
  2336. }
  2337. 
  2338. AVStream *av_new_stream(AVFormatContext *s, int id)
        ^
  2339. {
  2340.     AVStream *st;

libavformat/utils.c:2343:9: Taking true branch
  2341.     int i;
  2342. 
  2343.     if (s->nb_streams >= MAX_STREAMS)
                ^
  2344.         return NULL;
  2345. 

libavformat/utils.c:2344:9: 
  2342. 
  2343.     if (s->nb_streams >= MAX_STREAMS)
  2344.         return NULL;
                ^
  2345. 
  2346.     st = av_mallocz(sizeof(AVStream));

libavformat/utils.c:2378:1: return from a call to av_new_stream
  2376.     s->streams[s->nb_streams++] = st;
  2377.     return st;
  2378. }
        ^
  2379. 
  2380. AVProgram *av_new_program(AVFormatContext *ac, int id)

ffmpeg.c:3159:10: Taking true branch
3157. 
3158.     st = av_new_stream(oc, oc->nb_streams);
3159.     if (!st) {
               ^
3160.         fprintf(stderr, "Could not alloc stream\n");
3161.         av_exit(1);

ffmpeg.c:3160:9: 
3158.     st = av_new_stream(oc, oc->nb_streams);
3159.     if (!st) {
3160.         fprintf(stderr, "Could not alloc stream\n");
              ^
3161.         av_exit(1);
3162.     }

ffmpeg.c:3161:9: Skipping av_exit(): empty list of specs
3159.     if (!st) {
3160.         fprintf(stderr, "Could not alloc stream\n");
3161.         av_exit(1);
              ^
3162.     }
3163.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);

ffmpeg.c:3163:5: 
3161.         av_exit(1);
3162.     }
3163.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);
          ^
3164. 
3165.     bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
