static int open_input_stream(HTTPContext *c, const char *info)
{
    char buf[128];
    char input_filename[1024];
    AVFormatContext *s = NULL;
    int buf_size, i, ret;
    int64_t stream_pos;

    /* find file name */
    if (c->stream->feed) {
        strcpy(input_filename, c->stream->feed->feed_filename);
        buf_size = FFM_PACKET_SIZE;
        /* compute position (absolute time) */
        if (av_find_info_tag(buf, sizeof(buf), "date", info)) {
            if ((ret = av_parse_time(&stream_pos, buf, 0)) < 0) {
                http_log("Invalid date specification '%s' for stream\n", buf);
                return ret;
            }
        } else if (av_find_info_tag(buf, sizeof(buf), "buffer", info)) {
            int prebuffer = strtol(buf, 0, 10);
            stream_pos = av_gettime() - prebuffer * (int64_t)1000000;
        } else
            stream_pos = av_gettime() - c->stream->prebuffer * (int64_t)1000;
    } else {
        strcpy(input_filename, c->stream->feed_filename);
        buf_size = 0;
        /* compute position (relative time) */
        if (av_find_info_tag(buf, sizeof(buf), "date", info)) {
            if ((ret = av_parse_time(&stream_pos, buf, 1)) < 0) {
                http_log("Invalid date specification '%s' for stream\n", buf);
                return ret;
            }
        } else
            stream_pos = 0;
    }
    if (!input_filename[0]) {
        http_log("No filename was specified for stream\n");
        return AVERROR(EINVAL);
    }

    /* open stream */
    ret = avformat_open_input(&s, input_filename, c->stream->ifmt,
                              &c->stream->in_opts);
    if (ret < 0) {
        http_log("Could not open input '%s': %s\n",
                 input_filename, av_err2str(ret));
        return ret;
    }

    /* set buffer size */
    if (buf_size > 0) {
        ret = ffio_set_buf_size(s->pb, buf_size);
        if (ret < 0) {
            http_log("Failed to set buffer size\n");
            return ret;
        }
    }

    s->flags |= AVFMT_FLAG_GENPTS;
    c->fmt_in = s;
    if (strcmp(s->iformat->name, "ffm") &&
        (ret = avformat_find_stream_info(c->fmt_in, NULL)) < 0) {
        http_log("Could not find stream info for input '%s'\n", input_filename);
        avformat_close_input(&s);
        return ret;
    }

    /* choose stream as clock source (we favor the video stream if
     * present) for packet sending */
    c->pts_stream_index = 0;
    for(i=0;i<c->stream->nb_streams;i++) {
        if (c->pts_stream_index == 0 &&
            c->stream->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
            c->pts_stream_index = i;
        }
    }

    if (c->fmt_in->iformat->read_seek)
        av_seek_frame(c->fmt_in, -1, stream_pos, 0);
    /* set the start time (needed for maxtime and RTP packet timing) */
    c->start_time = cur_time;
    c->first_pts = AV_NOPTS_VALUE;
    return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.