libavformat/mov.c:3043: error: Integer Overflow L1
  ([-oo, 0] - 1):unsigned32 by call to `avformat_free_context`.

libavformat/mov.c:3039:9: Call
3037.         av_freep(&sc->stps_data);
3038.         av_freep(&sc->rap_group);
3039.         av_freep(&sc->display_matrix);
              ^
3040.     }
3041. 

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

libavformat/mov.c:3043:9: Call
3041. 
3042.     if (mov->dv_demux) {
3043.         avformat_free_context(mov->dv_fctx);
              ^
3044.         mov->dv_fctx = NULL;
3045.     }

libavformat/utils.c:2571:1: <LHS trace>
2569. }
2570. 
2571. void avformat_free_context(AVFormatContext *s)
      ^
2572. {
2573.     int i, j;

libavformat/utils.c:2571:1: Parameter `s->nb_chapters`
  2569. }
  2570. 
  2571. void avformat_free_context(AVFormatContext *s)
        ^
  2572. {
  2573.     int i, j;

libavformat/utils.c:2611:12: Binary operation: ([-oo, 0] - 1):unsigned32 by call to `avformat_free_context` 
  2609.     av_freep(&s->programs);
  2610.     av_freep(&s->priv_data);
  2611.     while (s->nb_chapters--) {
                   ^
  2612.         av_dict_free(&s->chapters[s->nb_chapters]->metadata);
  2613.         av_free(s->chapters[s->nb_chapters]);

void avformat_free_context(AVFormatContext *s)
{
    int i, j;
    AVStream *st;
    av_opt_free(s);
    if (s->iformat && s->iformat->priv_class && s->priv_data)
        av_opt_free(s->priv_data);
    for (i = 0; i < s->nb_streams; i++) {
        st = s->streams[i];
        for (j = 0; j < st->nb_side_data; j++)
            av_freep(&st->side_data[j].data);
        av_freep(&st->side_data);
        st->nb_side_data = 0;
        if (st->parser) {
            av_parser_close(st->parser);
        }
        if (st->attached_pic.data)
            av_free_packet(&st->attached_pic);
        av_dict_free(&st->metadata);
        av_freep(&st->probe_data.buf);
        av_free(st->index_entries);
        av_free(st->codec->extradata);
        av_free(st->codec->subtitle_header);
        av_free(st->codec);
        av_free(st->priv_data);
        av_free(st->info);
        av_free(st);
    }
    for (i = s->nb_programs - 1; i >= 0; i--) {
        av_dict_free(&s->programs[i]->metadata);
        av_freep(&s->programs[i]->stream_index);
        av_freep(&s->programs[i]);
    }
    av_freep(&s->programs);
    av_freep(&s->priv_data);
    while (s->nb_chapters--) {
        av_dict_free(&s->chapters[s->nb_chapters]->metadata);
        av_free(s->chapters[s->nb_chapters]);
    }
    av_freep(&s->chapters);
    av_dict_free(&s->metadata);
    av_freep(&s->streams);
    av_freep(&s->internal);
    av_free(s);
}
['static int mov_read_close(AVFormatContext *s)\n{\n    MOVContext *mov = s->priv_data;\n    int i, j;\n    for (i = 0; i < s->nb_streams; i++) {\n        AVStream *st = s->streams[i];\n        MOVStreamContext *sc = st->priv_data;\n        av_freep(&sc->ctts_data);\n        for (j = 0; j < sc->drefs_count; j++) {\n            av_freep(&sc->drefs[j].path);\n            av_freep(&sc->drefs[j].dir);\n        }\n        av_freep(&sc->drefs);\n        if (sc->pb && sc->pb != s->pb)\n            avio_close(sc->pb);\n        av_freep(&sc->chunk_offsets);\n        av_freep(&sc->stsc_data);\n        av_freep(&sc->sample_sizes);\n        av_freep(&sc->keyframes);\n        av_freep(&sc->stts_data);\n        av_freep(&sc->stps_data);\n        av_freep(&sc->rap_group);\n        av_freep(&sc->display_matrix);\n    }\n    if (mov->dv_demux) {\n        avformat_free_context(mov->dv_fctx);\n        mov->dv_fctx = NULL;\n    }\n    av_freep(&mov->trex_data);\n    return 0;\n}', 'void av_freep(void *arg)\n{\n    void **ptr = (void **)arg;\n    av_free(*ptr);\n    *ptr = NULL;\n}', 'void avformat_free_context(AVFormatContext *s)\n{\n    int i, j;\n    AVStream *st;\n    av_opt_free(s);\n    if (s->iformat && s->iformat->priv_class && s->priv_data)\n        av_opt_free(s->priv_data);\n    for (i = 0; i < s->nb_streams; i++) {\n        st = s->streams[i];\n        for (j = 0; j < st->nb_side_data; j++)\n            av_freep(&st->side_data[j].data);\n        av_freep(&st->side_data);\n        st->nb_side_data = 0;\n        if (st->parser) {\n            av_parser_close(st->parser);\n        }\n        if (st->attached_pic.data)\n            av_free_packet(&st->attached_pic);\n        av_dict_free(&st->metadata);\n        av_freep(&st->probe_data.buf);\n        av_free(st->index_entries);\n        av_free(st->codec->extradata);\n        av_free(st->codec->subtitle_header);\n        av_free(st->codec);\n        av_free(st->priv_data);\n        av_free(st->info);\n        av_free(st);\n    }\n    for (i = s->nb_programs - 1; i >= 0; i--) {\n        av_dict_free(&s->programs[i]->metadata);\n        av_freep(&s->programs[i]->stream_index);\n        av_freep(&s->programs[i]);\n    }\n    av_freep(&s->programs);\n    av_freep(&s->priv_data);\n    while (s->nb_chapters--) {\n        av_dict_free(&s->chapters[s->nb_chapters]->metadata);\n        av_free(s->chapters[s->nb_chapters]);\n    }\n    av_freep(&s->chapters);\n    av_dict_free(&s->metadata);\n    av_freep(&s->streams);\n    av_freep(&s->internal);\n    av_free(s);\n}']