ffmpeg.c:3609: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `new_audio_stream`.

ffmpeg.c:3609:5: Call
3607.     }
3608.     oc = output_files[nb_output_files - 1];
3609.     new_audio_stream(oc);
          ^
3610. }
3611. 

ffmpeg.c:3486:1: <LHS trace>
3484. }
3485. 
3486. static void new_audio_stream(AVFormatContext *oc)
      ^
3487. {
3488.     AVStream *st;

ffmpeg.c:3486:1: Parameter `oc->nb_streams`
  3484. }
  3485. 
  3486. static void new_audio_stream(AVFormatContext *oc)
        ^
  3487. {
  3488.     AVStream *st;

ffmpeg.c:3492:10: Call
  3490.     enum CodecID codec_id;
  3491. 
  3492.     st = av_new_stream(oc, streamid_map[oc->nb_streams]);
                 ^
  3493.     if (!st) {
  3494.         fprintf(stderr, "Could not alloc stream\n");

libavformat/utils.c:2495:1: Parameter `s->nb_streams`
    2493. }
    2494. 
    2495. AVStream *av_new_stream(AVFormatContext *s, int id)
          ^
    2496. {
    2497.     AVStream *st;

ffmpeg.c:3499:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `new_audio_stream` 
  3497.     avcodec_get_context_defaults2(st->codec, AVMEDIA_TYPE_AUDIO);
  3498. 
  3499.     bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
            ^
  3500.     audio_bitstream_filters= NULL;
  3501. 
