ffmpeg.c:3140: error: Null Dereference
  pointer `st` last assigned on line 3135 could be null and is dereferenced at line 3140, column 35.

ffmpeg.c:3129:1: start of procedure new_audio_stream()
3127. }
3128. 
3129. static void new_audio_stream(AVFormatContext *oc)
      ^
3130. {
3131.     AVStream *st;

ffmpeg.c:3135:5: 
3133.     int codec_id;
3134. 
3135.     st = av_new_stream(oc, oc->nb_streams);
          ^
3136.     if (!st) {
3137.         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:3136:10: Taking true branch
3134. 
3135.     st = av_new_stream(oc, oc->nb_streams);
3136.     if (!st) {
               ^
3137.         fprintf(stderr, "Could not alloc stream\n");
3138.         av_exit(1);

ffmpeg.c:3137:9: 
3135.     st = av_new_stream(oc, oc->nb_streams);
3136.     if (!st) {
3137.         fprintf(stderr, "Could not alloc stream\n");
              ^
3138.         av_exit(1);
3139.     }

ffmpeg.c:3138:9: Skipping av_exit(): empty list of specs
3136.     if (!st) {
3137.         fprintf(stderr, "Could not alloc stream\n");
3138.         av_exit(1);
              ^
3139.     }
3140.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);

ffmpeg.c:3140:5: 
3138.         av_exit(1);
3139.     }
3140.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);
          ^
3141. 
3142.     bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
