Function write_packet

libavformat/wtvenc.c:461–498

}

static int write_packet(AVFormatContext *s, AVPacket *pkt)
{
    AVIOContext *pb = s->pb;
    WtvContext  *wctx = s->priv_data;
    AVStream    *st   = s->streams[pkt->stream_index];

    if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && !wctx->thumbnail.size) {
        av_packet_ref(&wctx->thumbnail, pkt);
        return 0;
    } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
        int ret = ff_check_h264_startcode(s, st, pkt);
        if (ret < 0)
            return ret;
    }

    /* emit sync chunk and 'timeline.table.0.entries.Event' record every 50 frames */
    if (wctx->serial - (wctx->nb_sp_pairs ? wctx->sp_pairs[wctx->nb_sp_pairs - 1].serial : 0) >= 50)
        write_sync(s);

    /* emit 'table.0.entries.time' record every 500ms */
    if (pkt->pts != AV_NOPTS_VALUE && pkt->pts - (wctx->nb_st_pairs ? wctx->st_pairs[wctx->nb_st_pairs - 1].value : 0) >= 5000000)
        add_serial_pair(&wctx->st_pairs, &wctx->nb_st_pairs, wctx->serial, pkt->pts);

    if (pkt->pts != AV_NOPTS_VALUE && pkt->pts > wctx->last_pts) {
        wctx->last_pts = pkt->pts;
        wctx->last_serial = wctx->serial;
    }

    // write timestamp chunk
    write_timestamp(s, pkt);

    write_chunk_header(s, &ff_data_guid, pkt->size, INDEX_BASE + pkt->stream_index);
    avio_write(pb, pkt->data, pkt->size);
    write_pad(pb, WTV_PAD8(pkt->size) - pkt->size);

    wctx->serial++;
    return 0;
}

static int write_table0_header_events(AVIOContext *pb)
{