ffmpeg.c:3411: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `new_audio_stream`.

ffmpeg.c:3411:5: Call
3409.     }
3410.     oc = output_files[nb_output_files - 1];
3411.     new_audio_stream(oc);
          ^
3412. }
3413. 

ffmpeg.c:3292:1: <LHS trace>
3290. }
3291. 
3292. static void new_audio_stream(AVFormatContext *oc)
      ^
3293. {
3294.     AVStream *st;

ffmpeg.c:3292:1: Parameter `oc->nb_streams`
  3290. }
  3291. 
  3292. static void new_audio_stream(AVFormatContext *oc)
        ^
  3293. {
  3294.     AVStream *st;

ffmpeg.c:3298:10: Call
  3296.     enum CodecID codec_id;
  3297. 
  3298.     st = av_new_stream(oc, oc->nb_streams);
                 ^
  3299.     if (!st) {
  3300.         fprintf(stderr, "Could not alloc stream\n");

libavformat/utils.c:2453:1: Parameter `s->nb_streams`
    2451. }
    2452. 
    2453. AVStream *av_new_stream(AVFormatContext *s, int id)
          ^
    2454. {
    2455.     AVStream *st;

ffmpeg.c:3305:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `new_audio_stream` 
  3303.     avcodec_get_context_defaults2(st->codec, AVMEDIA_TYPE_AUDIO);
  3304. 
  3305.     bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
            ^
  3306.     audio_bitstream_filters= NULL;
  3307. 
