avconv.c:191: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `avformat_close_input`.

avconv.c:159:9: Call
157.         }
158.         av_freep(&filtergraphs[i]->outputs);
159.         av_freep(&filtergraphs[i]->graph_desc);
             ^
160.         av_freep(&filtergraphs[i]);
161.     }

libavutil/mem.c:202:5: Assignment
  200.     void **ptr = (void **)arg;
  201.     av_free(*ptr);
  202.     *ptr = NULL;
           ^
  203. }
  204. 

avconv.c:191:9: Call
189.     }
190.     for (i = 0; i < nb_input_files; i++) {
191.         avformat_close_input(&input_files[i]->ctx);
             ^
192.         av_freep(&input_files[i]);
193.     }

libavformat/utils.c:2647:1: Parameter `(*ps)->nb_programs`
  2645. }
  2646. 
  2647. void avformat_close_input(AVFormatContext **ps)
        ^
  2648. {
  2649.     AVFormatContext *s = *ps;

libavformat/utils.c:2662:5: Call
  2660.             s->iformat->read_close(s);
  2661. 
  2662.     avformat_free_context(s);
            ^
  2663. 
  2664.     *ps = NULL;

libavformat/utils.c:2596:1: <LHS trace>
2594. }
2595. 
2596. void avformat_free_context(AVFormatContext *s)
      ^
2597. {
2598.     int i, j;

libavformat/utils.c:2596:1: Parameter `s->nb_programs`
    2594. }
    2595. 
    2596. void avformat_free_context(AVFormatContext *s)
          ^
    2597. {
    2598.     int i, j;

libavformat/utils.c:2629:10: Binary operation: ([0, +oo] - 1):unsigned32 by call to `avformat_close_input` 
    2627.         av_free(st);
    2628.     }
    2629.     for (i = s->nb_programs - 1; i >= 0; i--) {
                   ^
    2630.         av_dict_free(&s->programs[i]->metadata);
    2631.         av_freep(&s->programs[i]->stream_index);
