{"id":5773,"date":"2026-05-26T14:10:00","date_gmt":"2026-05-26T05:10:00","guid":{"rendered":"https:\/\/www.freelifemakers.org\/wordpress\/?p=5773"},"modified":"2026-05-26T14:23:43","modified_gmt":"2026-05-26T05:23:43","slug":"mediaserver-mini_mediaserver_1-code-description-process_complete_message1-6","status":"publish","type":"post","link":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/2026\/05\/26\/mediaserver-mini_mediaserver_1-code-description-process_complete_message1-6\/","title":{"rendered":"[Mediaserver]mini_Mediaserver_1-\ucf54\ub4dc\uc124\uba85\/code description-process_complete_message()(1-6)"},"content":{"rendered":"\n
type<\/th>\uc774\ub984\/Name<\/th>\uc758\ubbf8\/Description<\/th><\/tr><\/thead>
1<\/td>Set Chunk Size<\/td>chunk_size_in_ \ubcc0\uacbd. \uae30\ubcf8 128 \u2192 \ub354 \ud070 \uac12\uc73c\ub85c \/
Change chunk_size_in_. Default 128 \u2192 to a larger value<\/td><\/tr>
3<\/td>Acknowledgement<\/td>\ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \uc804\uc1a1\ud55c \ub370\uc774\ud130\uc591\uc744 \uc54c\ub9bc \/ Notify the amount of data sent by the client<\/td><\/tr>
4<\/td>User Control<\/td>Ping\/Pong, \uc2a4\ud2b8\ub9bc \uc81c\uc5b4 \/ stream control<\/td><\/tr>
5<\/td>Window Ack Size<\/td>Ack \ubcf4\ub0bc \uc6a9\ub7c9 \uc124\uc815. (5MB) \/
Set ACK sending capacity. (5MB)<\/td><\/tr>
8<\/td>Audio Data<\/td>\uc624\ub514\uc624 \ud504\ub808\uc784 \ub370\uc774\ud130(payload)\/
Audio frame data (payload)<\/td><\/tr>
9<\/td>Video Data<\/td>\ube44\ub514\uc624 \ud504\ub808\uc784 H264 \ub370\uc774\ud130(payload) \/
Video frame H264 data (payload)<\/td><\/tr>
18<\/td>AMF0 Data<\/td>onMetaData, @setDataFrame \ub4f1 \uba54\ud0c0 \uc815\ubcf4 \/ meta information<\/td><\/tr>
20<\/td>AMF0 Command<\/td>connect, publish, play \uac19\uc740 \uba85 \/ Commands like connect, publish, and play<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u2714\ufe0f \ud551\ud401\uc81c\uc5b4 \/ Ping pong control<\/p>\n\n\n\n

— cur_msg_type_ == 4 \uc740 Ping Pong \uc2a4\ud2b8\ub9bc\uc81c\uc5b4\uc5d0 \ub300\ud55c \ubd80\ubd84\uc785\ub2c8\ub2e4.
cur_msg_type_ == 4 is the part regarding Ping Pong stream control.<\/p>\n\n\n\n

— ping\uc694\uccad\uc774 \ub4e4\uc5b4\uc654\uc744\ub584 \uc751\ub2f5\uc744 \uad6c\uc131\ud558\ub294 \ubd80\ubd84\uc785\ub2c8\ub2e4.
This is the part that configures the response when a ping request is received.<\/p>\n\n\n\n

— pong = [\ud5e4\ub354 (Header)] + [\ud0c0\uc785 \uc2dd\ubcc4\uc790 (Type)] + [\uc2e4\uc81c \ub370\uc774\ud130 (Payload)]
pong = [Header] + [Type Identifier] + [Actual Data (Payload)]<\/p>\n\n\n\n

std::vector<uint8_t> pong;\npong.push_back(0x02);\npong.insert(pong.end(), {0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x04});\npong.insert(pong.end(), {0x00, 0x00, 0x00, 0x00});\npong.insert(pong.end(), {0x00, 0x07}); \/\/ Pong\npong.insert(pong.end(), payload_buf_.begin() + 2, payload_buf_.begin() + 6);\nasio::write(socket_, asio::buffer(pong));\nstd::cout << \"[Server] Pong sent\\n\";<\/code><\/pre>\n\n\n\n
— \ud328\ud0b7 \uad6c\uc870\ub3c4 \/ packet structure diagram<\/p>\n\n\n\n
\ubc14\uc774\ud2b8 \uadf8\ub8f9 \/ byte group<\/th>\uc5ed\ud560 \/ role<\/th>\uc124\uba85\/Description<\/th><\/tr><\/thead>
0x02<\/code><\/td>\uc0c1\ud0dc\/\ubc84\uc804 \ud50c\ub798\uadf8
Status\/Version Flags<\/td>		\uc804\uccb4 \ud328\ud0b7\uc758 \ucd08\uae30 \uc0c1\ud0dc \ub610\ub294 \ubc84\uc804 \uc9c0\uc815
Specifying the initial state or version of the entire packet<\/td><\/tr>
{0x00, ..., 0x04}<\/code><\/td>\uba54\uc2dc\uc9c0 \ud5e4\ub354
message header<\/td>		\uba54\uc2dc\uc9c0\uc758 \ud06c\uae30, \uae38\uc774, \uc804\uc1a1 \uacbd\ub85c \ub4f1 \uad6c\uc870\uc801 \uc815\ubcf4\ub97c \uc815\uc758
Defines structural information such as message size, length, and transmission path.<\/td><\/tr>
{0x00, x00, x00, x00}<\/code><\/td>\uc608\ube44\/\ud328\ub529 \ud544\ub4dc
Spare\/Padded Field<\/td>		\ubbf8\ub798 \ud655\uc7a5\uc774\ub098 \ub370\uc774\ud130 \uc815\ub82c\uc744 \uc704\ud55c \uacf5\uac04
Space for future expansion or data alignment<\/td><\/tr>
{0x00, 0x07}<\/code><\/td>\uba54\uc2dc\uc9c0 \ud0c0\uc785 
Message Type<\/td>		Pong \uc751\ub2f5\uc120\uc5b8
Pong response declaration<\/td><\/tr>
(payload_buf...<\/code><\/td>\uc2e4\uc81c \ub370\uc774\ud130 
Payload<\/td>		Ping\uc744 \ubc1b\uc558\uc744 \ub54c \uc694\uccad\ubc1b\uc740 \ubcf8\ubb38 \ub370\uc774\ud130\ub97c \uadf8\ub300\ub85c \ubc18\uc0ac(Echo)\ud558\uc5ec \ud3ec\ud568
When a ping is received, the requested body data is reflected (echoed) and included as is.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
— payload_buf_.begin() + 2\uacfc payload_buf_.begin() + 6<\/p>\n\n\n\n
1)payload_buf_begin() = [0],payload_buf_begin() + 2 = [2],payload_buf_begin() + 6 = [6]<\/p>\n\n\n\n
2) \ud558\uc9c0\ub9cc [6]\uc740 \ud3ec\ud568\uc548\ub429\ub2c8\ub2e4.
However, [6] is not included.<\/p>\n\n\n\n
3) payload \ubc30\uc5f4\uc758 \uc138 \ubc88\uc9f8 \ubc14\uc774\ud2b8\ubd80\ud130 \uc5ec\uc12f \ubc88\uc9f8 \ubc14\uc774\ud2b8 \uc9c1\uc804\uae4c\uc9c0\uc758 \ub370\uc774\ud130\ub97c \uac00\uc838\uc640\uc11c pong \ubc84\ud37c\uc5d0 \ubd99\uc785\ub2c8\ub2e4.
It retrieves data from the payload array from the third byte up to just before the sixth byte and appends it to the pong buffer.<\/p>\n\n\n\n
4) \uadf8\ub7fc \uac12\ub4e4\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.
Then the values \u200b\u200bare as follows.<\/p>\n\n\n\n
# \uc804\uccb4 \ubc30\uc5f4 \/ full array\n\n{ 0x02,0x00, [0x00, 0x00, 0x00, 0x00,] 0x06, 0x04,0x00, 0x00, 0x00, 0x00,0x00, 0x07 }\n\n# pong.insert(pong.end(), payload_buf_.begin() + 2, payload_buf_.begin() + 6);\n# poing.insert(pong.end(),start, end); --> start\ubd80\ud130 end\uae4c\uc9c0  \/ From start to end\n# \ubc14\ub85c \uc704\uc758 \ucf54\ub4dc\uac00 \uc2e4\ud589\ub420\ub584 pong\uc5d0 \ucd94\uac00\ub418\ub294 \ubc30\uc5f4\n# Array added to pong when the code immediately above is executed\n\n[0x00, 0x00, 0x00, 0x00,]<\/code><\/pre>\n\n\n\n
\u2714\ufe0f AMF0 Command<\/p>\n\n\n\n
— \ub098\uc911\uc5d0 \ub530\ub85c \uc124\uba85\ud569\ub2c8\ub2e4.
This will be explained separately later.<\/p>\n\n\n\n
else if (cur_msg_type_ == 20) {\n        handle_command();\n}<\/code><\/pre>\n\n\n\n
\u2714\ufe0f Audio Data<\/p>\n\n\n\n
— flv_write.cpp\uc5d0\uc11c \ub530\ub85c \uc124\uba85\ud569\ub2c8\ub2e4.
This is explained separately in flv_write.cpp.<\/p>\n\n\n\n
\u2714\ufe0f Video Data<\/p>\n\n\n\n
— flv_write.cpp\uc5d0\uc11c \ub530\ub85c \uc124\uba85\ud569\ub2c8\ub2e4.
This is explained separately in flv_write.cpp.<\/p>\n\n\n\n
— \ud398\uc774\ub85c\ub4dc\uc5d0 \ub2f4\uae30\ub294 \ubaa8\ub4e0 \uac83\uc740 \ubc14\uc774\ud2b8(0~255\uc758 \uc22b\uc790 \uac12) \uc785\ub2c8\ub2e4.
Everything contained in the payload is a byte (numerical value from 0 to 255).<\/p>\n\n\n\n
— \uc774\ub7f0 \uc22b\uc790\ub4e4\uc740 \ud504\ub85c\ud1a0\ucf5c\uc5d0 \ub530\ub77c \uc601\uc0c1\ud30c\uc77c\ub85c \ud30c\uc2f1\ub429\ub2c8\ub2e4.
These numbers are parsed into an image file according to the protocol.<\/p>\n\n\n\n
else if (cur_msg_type_ == 9) {\n        if (payload_buf_.size() >= 1 && (payload_buf_[0] & 0x0F) == 7) {\n            flv_writer_->write_tag(0x09, cur_msg_timestamp_, payload_buf_);\n        }\n}<\/code><\/pre>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
type \uc774\ub984\/Name \uc758\ubbf8\/Description 1 Set Chunk Size chunk_size_in_ \ubcc0\uacbd. \uae30\ubcf8 128 \u2192 \ub354 \ud070 \uac12\uc73c\ub85c \/ Change chunk_size_in_. Default 128 \u2192 to a larger value 3 Acknowledgement \ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \uc804\uc1a1\ud55c \ub370\uc774\ud130\uc591\uc744 \uc54c\ub9bc \/ Notify the amount of data sent by the client 4 User Control Ping\/Pong, \uc2a4\ud2b8\ub9bc \uc81c\uc5b4 \/ stream control 5 Window Ack Size Ack […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,1],"tags":[],"class_list":["post-5773","post","type-post","status-publish","format-standard","hentry","category-cpp","category-uncategorized","missing-thumbnail"],"_links":{"self":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5773","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/comments?post=5773"}],"version-history":[{"count":4,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5773\/revisions"}],"predecessor-version":[{"id":5777,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5773\/revisions\/5777"}],"wp:attachment":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/media?parent=5773"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/categories?post=5773"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/tags?post=5773"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}