ffmpeg.c:3170: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `new_audio_stream`.

ffmpeg.c:3170:5: Call
3168.     }
3169.     oc = output_files[nb_output_files - 1];
3170.     new_audio_stream(oc);
          ^
3171. }
3172. 

ffmpeg.c:3065:1: <LHS trace>
3063. }
3064. 
3065. static void new_audio_stream(AVFormatContext *oc)
      ^
3066. {
3067.     AVStream *st;

ffmpeg.c:3065:1: Parameter `oc->nb_streams`
  3063. }
  3064. 
  3065. static void new_audio_stream(AVFormatContext *oc)
        ^
  3066. {
  3067.     AVStream *st;

ffmpeg.c:3071:10: Call
  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: Parameter `s->nb_streams`
    2243. }
    2244. 
    2245. AVStream *av_new_stream(AVFormatContext *s, int id)
          ^
    2246. {
    2247.     AVStream *st;

ffmpeg.c:3078:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `new_audio_stream` 
  3076.     avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);
  3077. 
  3078.     bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
            ^
  3079.     audio_bitstream_filters= NULL;
  3080. 
