ffmpeg rtsp 解析

//rtsp 连接过程

ff_rtsp_connect

ff_rtsp_setup_input_streams
ff_rtsp_send_cmd

ff_sdp_parse

//rtsp 取数据流程

ff_rtsp_fetch_packet

ff_rtp_parse_packet

rtp_parse_packet_internal

以下handler 可能是

RTPDynamicProtocolHandler ff_mpeg4_generic_dynamic_handler = {
    .enc_name           = "mpeg4-generic",
    .codec_type         = AVMEDIA_TYPE_AUDIO,
    .codec_id           = AV_CODEC_ID_AAC,
    .priv_data_size     = sizeof(PayloadContext),
    .parse_sdp_a_line   = parse_sdp_line,
    .close              = close_context,
    .parse_packet       = aac_parse_packet,
};

RTPDynamicProtocolHandler ff_h264_dynamic_handler = {
    .enc_name         = "H264",
    .codec_type       = AVMEDIA_TYPE_VIDEO,
    .codec_id         = AV_CODEC_ID_H264,
    .need_parsing     = AVSTREAM_PARSE_FULL,
    .priv_data_size   = sizeof(PayloadContext),
    .parse_sdp_a_line = parse_h264_sdp_line,
    .close            = h264_close_context,
    .parse_packet     = h264_handle_packet,
};