Function avformat_new_stream

libavformat/options.c:245–329

}

AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
{
    FFStream *sti;
    AVStream *st;
    AVStream **streams;

    if (s->nb_streams >= s->max_streams) {
        av_log(s, AV_LOG_ERROR, "Number of streams exceeds max_streams parameter"
               " (%d), see the documentation if you wish to increase it\n",
               s->max_streams);
        return NULL;
    }
    streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
    if (!streams)
        return NULL;
    s->streams = streams;

    sti = av_mallocz(sizeof(*sti));
    if (!sti)
        return NULL;
    st = &sti->pub;

    st->av_class = &stream_class;
    st->codecpar = avcodec_parameters_alloc();
    if (!st->codecpar)
        goto fail;

    sti->fmtctx = s;

    sti->parse_pkt = av_packet_alloc();
    if (!sti->parse_pkt)
        goto fail;

    if (s->iformat) {
        sti->avctx = avcodec_alloc_context3(NULL);
        if (!sti->avctx)
            goto fail;

        sti->info = av_mallocz(sizeof(*sti->info));
        if (!sti->info)
            goto fail;

#if FF_API_R_FRAME_RATE
        sti->info->last_dts      = AV_NOPTS_VALUE;
#endif
        sti->info->fps_first_dts = AV_NOPTS_VALUE;
        sti->info->fps_last_dts  = AV_NOPTS_VALUE;

        /* default pts setting is MPEG-like */
        avpriv_set_pts_info(st, 33, 1, 90000);
        /* we set the current DTS to 0 so that formats without any timestamps
         * but durations get some timestamps, formats with some unknown
         * timestamps have their first few packets buffered and the
         * timestamps corrected before they are returned to the user */
        sti->cur_dts = RELATIVE_TS_BASE;
    } else {
        sti->cur_dts = AV_NOPTS_VALUE;
    }