vlc open rtsp fail, server side error message

[INFO  rtsp_demo.c:408:rtsp_new_client_connection] new rtsp client 10.42.0.1:47890 comming
[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
SETUP rtsp://10.42.0.63:554/live/0 RTSP/1.0
CSeq: 0
Transport: RTP/AVP;unicast;client_port=9298-9299

[DEBUG rtsp_demo.c:950:rtsp_handle_SETUP]
[WARN  rtsp_demo.c:980:rtsp_handle_SETUP] rtsp urlpath:/live/0 err
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 461 Unsupported Transport
CSeq: 0
Date: Fri Oct  4 16:17:52 2024
Server: rtsp_demo

[INFO  rtsp_demo.c:408:rtsp_new_client_connection] new rtsp client 10.42.0.1:47902 comming
[DEBUG rtsp_demo.c:1158:rtsp_recv_msg] peer closed
[INFO  rtsp_demo.c:427:rtsp_del_client_connection] delete client 86 from 10.42.0.1
[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
OPTIONS rtsp://10.42.0.63:554 RTSP/1.0
CSeq: 1
User-Agent: RealMedia Player Version 6.0.9.1235 (linux-2.0-libc6-i386-gcc2.95)
ClientChallenge: 9e26d33f2984236010ef6253fb1887f7
PlayerStarttime: [28/03/2003:22:50:23 00:00]
CompanyID: KnKV4M4I/B2FjJ1TToLycw==
GUID: 00000000-0000-0000-0000-000000000000
RegionData: 0
ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586

[WARN  rtsp_msg.c:888:rtsp_msg_parse_from_array] unknown line: ClientChallenge: 9e26d33f2984236010ef6253fb1887f7
[WARN  rtsp_msg.c:888:rtsp_msg_parse_from_array] unknown line: PlayerStarttime: [28/03/2003:22:50:23 00:00]
[WARN  rtsp_msg.c:888:rtsp_msg_parse_from_array] unknown line: CompanyID: KnKV4M4I/B2FjJ1TToLycw==
[WARN  rtsp_msg.c:888:rtsp_msg_parse_from_array] unknown line: GUID: 00000000-0000-0000-0000-000000000000
[WARN  rtsp_msg.c:888:rtsp_msg_parse_from_array] unknown line: RegionData: 0
[WARN  rtsp_msg.c:888:rtsp_msg_parse_from_array] unknown line: ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586
[DEBUG rtsp_demo.c:725:rtsp_handle_OPTIONS]
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 1
Date: Fri Oct  4 16:17:53 2024
Public: OPTIONS, DESCRIBE, SETUP, PLAY, PAUSE, TEARDOWN
Server: rtsp_demo

[DEBUG rtsp_demo.c:1158:rtsp_recv_msg] peer closed
[INFO  rtsp_demo.c:427:rtsp_del_client_connection] delete client 87 from 10.42.0.1

OK 的版本，使用 ffplay

ffplay "rtsp://10.42.0.254/live/0"

server 端 log

[INFO  rtsp_demo.c:408:rtsp_new_client_connection] new rtsp client 10.42.0.1:35114 comming
[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
OPTIONS rtsp://10.42.0.254:554/live/0 RTSP/1.0
CSeq: 1
User-Agent: Lavf60.16.100

[DEBUG rtsp_demo.c:725:rtsp_handle_OPTIONS]
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 1
Date: Fri Jan  1 12:16:08 2021
Public: OPTIONS, DESCRIBE, SETUP, PLAY, PAUSE, TEARDOWN
Server: rtsp_demo

[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
DESCRIBE rtsp://10.42.0.254:554/live/0 RTSP/1.0
Accept: application/sdp
CSeq: 2
User-Agent: Lavf60.16.100

[DEBUG rtsp_demo.c:746:rtsp_handle_DESCRIBE]
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 2
Date: Fri Jan  1 12:16:08 2021
Server: rtsp_demo
Content-Type: application/sdp
Content-Length: 479

v=0
o=- 0 0 IN IP4 0.0.0.0
s=rtsp_demo
t=0 0
a=control:rtsp://10.42.0.254:554/live/0
a=range:npt=0-
m=video 0 RTP/AVP 96
c=IN IP4 0.0.0.0
a=rtpmap:96 H265/90000
a=fmtp:96 sprop-vps=QAEMAf//AWAAAAMAgAAAAwAAAwCWvAk=;sprop-sps=QgEBAWAAAAMAgAAAAwAAAwCWoAEgIAURY2+7ymbgICAggAAAAwCAAAAMhA==;sprop-pps=RAHAcoaNQTZA
a=control:rtsp://10.42.0.254:554/live/0/track1
m=audio 0 RTP/AVP 97
c=IN IP4 0.0.0.0
a=rtpmap:97 PCMA/8000/2
a=control:rtsp://10.42.0.254:554/live/0/track2
[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
SETUP rtsp://10.42.0.254:554/live/0/track1 RTSP/1.0
Transport: RTP/AVP/TCP;unicast;interleaved=0-1
CSeq: 3
User-Agent: Lavf60.16.100

[DEBUG rtsp_demo.c:950:rtsp_handle_SETUP]
[INFO  rtsp_demo.c:894:rtsp_new_rtp_connection] new rtp over tcp for video ssrc:2234567c peer_addr:10.42.0.1 interleaved:0-1
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 3
Date: Fri Jan  1 12:16:08 2021
Session: 1234567A
Transport: RTP/AVP/TCP;ssrc=2234567C;interleaved=0-1
Server: rtsp_demo

[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
SETUP rtsp://10.42.0.254:554/live/0/track2 RTSP/1.0
Transport: RTP/AVP/TCP;unicast;interleaved=2-3
CSeq: 4
User-Agent: Lavf60.16.100
Session: 1234567A

[DEBUG rtsp_demo.c:950:rtsp_handle_SETUP]
[INFO  rtsp_demo.c:894:rtsp_new_rtp_connection] new rtp over tcp for audio ssrc:2234567d peer_addr:10.42.0.1 interleaved:2-3
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 4
Date: Fri Jan  1 12:16:08 2021
Session: 1234567A
Transport: RTP/AVP/TCP;ssrc=2234567D;interleaved=2-3
Server: rtsp_demo

[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
PLAY rtsp://10.42.0.254:554/live/0 RTSP/1.0
Range: npt=0.000-
CSeq: 5
User-Agent: Lavf60.16.100
Session: 1234567A

[DEBUG rtsp_demo.c:1037:rtsp_handle_PLAY]
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 5
Date: Fri Jan  1 12:16:08 2021
Session: 1234567A
Server: rtsp_demo

[ntp.c][rkipc_ntp_update]:connect error
[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
OPTIONS rtsp://10.42.0.254:554/live/0 RTSP/1.0
CSeq: 6
User-Agent: Lavf60.16.100
Session: 1234567A

[DEBUG rtsp_demo.c:725:rtsp_handle_OPTIONS]
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 6
Date: Fri Jan  1 12:16:38 2021
Session: 1234567A
Public: OPTIONS, DESCRIBE, SETUP, PLAY, PAUSE, TEARDOWN
Server: rtsp_demo

struct Node {
    std::string key;
    int value;
    std::vector<Node> children;

    REFLECT()       // Enable reflection for this type
};

REFLEC( ) 是：

define REFLECT() \
    friend struct reflect::DefaultResolver; \
    static reflect::TypeDescriptor_Struct Reflection; \
    static void initReflection(reflect::TypeDescriptor_Struct*);

所以是在 structure 中增加一個 static variable 和 一個function

Reflection,
initReflection()

然後還有宣告

/ Define Node's type descriptor
REFLECT_STRUCT_BEGIN(Node)
REFLECT_STRUCT_MEMBER(key)
REFLECT_STRUCT_MEMBER(value)
REFLECT_STRUCT_MEMBER(children)
REFLECT_STRUCT_END()

就是依序把Node struct 的 member 宣告一下。
這部份解開就是

    reflect::TypeDescriptor_Struct Node::Reflection{type::initReflection}; 
    void Node::initReflection(reflect::TypeDescriptor_Struct* typeDesc) { 
        using T = Node; 
        typeDesc->name = "Node"; 
        typeDesc->size = sizeof(Node); 
        typeDesc->members = {
        
            {"key",      offsetof(Node, key),      reflect::TypeResolver<std:tring>::get()},
            {"value",    offsetof(Node, value),    reflect::TypeResolver<int>::get()},
            {"children", offsetof(Node, children), reflect::TypeResolver<std:vector<Node>>::get()},
            
        };
    }

main( ) 在告完 Node 變數後，就呼叫：

   reflect::TypeDescriptor* typeDesc = reflect::TypeResolver<Node>::get();

看一下 reflect::TypeResolver<Node>::get*()，template 展開

struct TypeResolver {
    static TypeDescriptor* get() {
        return DefaultResolver::get<Node>();
    }
};

DefaultResolver:get 也是 template:

// This version is called if T has a static member named "Reflection":
    template <typename T, typename std::enable_if<IsReflected<T>::value, int>::type = 0>
    static TypeDescriptor* get() {
        return &T::Reflection;
    }

    // This version is called otherwise:
    template <typename T, typename std::enable_if<!IsReflected<T>::value, int>::type = 0>
    static TypeDescriptor* get() {
        return getPrimitiveDescriptor<T>();
    }

先解開

template <typename T, typename std::enable_if<IsReflected<T>::value, int>::type = 0>

用 std::enable_if 來區分要用那一個

std::enable_if<IsReflected<T>::value, int>::type = 0

enable_if 的 boolean 是 IsRlected<T>::value
IfReflected 是

    struct IsReflected {
        enum { value = (sizeof(func<T>(nullptr)) == sizeof(char)) };
    };

value 的值是 true or false:

(sizeof(func<T>(nullptr)) == sizeof(char)) 

func<T>(nullptr) 有兩個定義，由 T 沒有 member variable : Reflection 決定。Node 有，所以func 是..

template <typename T> static char func(decltype(&T::Reflection));

所以是sizeof(char)，所以 value 是 true，也就是 IsReflected<Node>::value 是 true
配合 std::enable_if 用...

   template <typename T, typename std::enable_if<IsReflected<T>::value, int>::type = 0>
    static TypeDescriptor* get() {
        return &T::Reflection;
    }

所以是main( ) 中呼叫 :: get( ) 會回傳，Node::Reflection

之後 typeDesc->dump(&node);
就是 static reflect::TypeDescriptor_Struct 的 dump() :

    virtual void dump(const void* obj, int indentLevel) const override {
        std::cout << name << " {" << std::endl;
        for (const Member& member : members) {
            std::cout << std::string(4 * (indentLevel + 1), ' ') << member.name << " = ";
            member.type->dump((char*) obj + member.offset, indentLevel + 1);
            std::cout << std::endl;
        }
        std::cout << std::string(4 * indentLevel, ' ') << "}";
    }