From Gnash Project Wiki
An RTMP message is a series of AMF objects, used to transfer data. All messages start with the standard RTMP header, which for results is always the 12 byte header version. The AMF objects used are primarily properties of an object, so they all have a name, followed by a value.
Rather than using text bases tables, like the rest of this page, I used OpenOffice to make an annotated color coded exaplanation of decoding several commonly seen RTMP packets. The easy to print version is here as a PDF, and the original
original ODT file, incase somebody makes corrections or adds more packets.
NC Connect Success Message
| 03 00 00 00 00 00 81 14 00 00 00 00 | (rtmp header)
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| 02 00 07 5f 02 65 73 75 6c 74 | "_result"
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| 00 3f f0 00 00 00 00 00 00 05 | (a double)
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| 03 | (start object)
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| 00 0b 61 70 70 6c 69 63 61 74 69 6f 6e | "application"
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| 00 05 6c 65 76 65 6c | "level"
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| 02 00 06 73 74 61 74 75 73 | "status"
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| 00 0b 64 65 73 63 72 69 70 74 69 6f 6e | "description"
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| 02 00 15 43 6f 6e 6e 65 63 74 69 6f 6e 20 73 75 63 63 65 65 64 65 64 2e | "Connection succeeded"
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| 00 04 63 6f 64 65 | "code"
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| 02 00 1d 4e 65 74 43 6f 6e 6e 65 63 74 69 6f 6e 2e 43 6f 6e 6e 65 63 74 2e 53 75 63 63 65 73 73 | "Connection.Connect.Sucess"
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| 00 00 09 | (end of object)
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??? Message
| 03 00 00 00 00 00 bf 14 00 00 00 00 | (rtmp header)
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| 02 00 07 5f 72 65 73 75 6c 74 | "_result"
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| 00 3f f0 00 00 00 00 00 00 | (a double)
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| 03 | (start object)
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| 00 06 66 6d 73 56 65 72 | "fmsVer"
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| 02 00 0e 46 4d 53 2f 33 2c 30 2c 30 2c 31 31 35 37 | "FMS/3,0,0,1157"
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| 00 0c 63 61 70 61 62 69 6c 69 74 69 65 73 | "capabilities"
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| 00 40 3f 00 00 00 00 00 00 | (a double)
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| 00 00 09 | (end of object)
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| 03 | (start object)
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| 00 05 6c 65 76 65 6c | "level"
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| 02 00 06 73 74 61 74 75 73 | "status"
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| 00 04 63 6f 64 65 | "code"
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| 02 00 1d 4e 65 74 43 6f 6e 6e 65 63 74 69 6f 6e 2e 43 6f 6e 6e 65 63 74 2e 53 75 63 63 65 73 73 | "NetConnection.Connect.Success"
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| 00 0b 64 65 73 63 72 69 70 74 69 6f 6e | "description"
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| 02 00 15 43 6f 6e 6e 65 63 74 69 6f 6e 20 73 75 63 63 65 65 64 65 64 2e | "Connection succeeded"
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| 00 0e 6f 62 6a 65 63 74 45 6e 63 6f 64 69 6e 67 | "objectEncoding"
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| 00 00 00 00 00 00 00 00 00 | (a double)
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| 00 00 09 | (end of object)
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The result
| 03 00 00 00 00 00 1d 14 00 00 00 00 | (rtmp header)
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| 02 00 07 5f 72 65 73 75 6c 74 | "_result"
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| 00 40 00 00 00 00 00 00 00 | CallID (double)
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| 05 | (a null)
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| 00 3f f0 00 00 00 00 00 00 | 1.: the created stream ID (a double)
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Publish Message
| 08/00 00 be/00 00 29/14/01 00 00 00 | (rtmp header) channel 8, timestamp 0xbe ms, 0x29(41) bytes, Packet type 0x14 (invoke), StreamID 1. (notice: Little Endian !)
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| 02 00 07 70 75 62 6c 69 73 68 | "publish"
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| 00 00 00 00 00 00 00 00 00 | CallID (double)
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| 05 | (a null)
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| 02 00 0b 6c 69 76 65 73 74 72 65 61 6d 32 | "livestream2"
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| 02 00 04 6c 69 76 65 | "live"
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Command
| 42/00 00 00/00 00 0a/04 | Header Header: 0x42: 01_00_0011, 8 bytes header, channel 2, streamID of the previous channel 2 message, timestamp:0, size: 0x0a, type 0x4:command
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| 00 03/00 00 00 01/00 00 00 00 | 0x03: , ID: 0x1, 0x0
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Command
| 02/00 00 00/00 00 06/04/00 00 00 00 |
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| 00 00/00 00 00 01 |
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Invoke onStatus
| 04/00 00 00/00 00 8b/14/01 00 00 00 |
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| 02 00 08 6f 6e 53 74 61 74 75 73 | "onStatus"
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| 00 00 00 00 00 00 00 00 00 05 | (a double)
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| 03 | (start object)
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| 00 05 6c 65 76 65 6c | "level"
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| 02 00 06 73 74 61 74 75 73 | "status"
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| 00 04 63 6f 64 65 | "code"
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| 02 00 17 4e 65 74 53 74 72 65 61 6d 2e 50 75 62 6c 69 73 68 2e 53 74 61 72 74 |
"NetStream.Publish.Start"
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| 00 0b 64 65 73 63 72 69 70 74 69 6f 6e | "description"
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| 02 00 1d 6c 69 76 65 73 74 72 65 61 6d 32 20 69 73 20 6e 6f 77 20 70 75 62 6c 69 73 68 65 64 2e 00 08 63 6c 69 65 6e 74 69 64 | "livestream2 is now published"
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| 02 00 08 c4 41 44 41 41 34 4d 46 48 | "clientid"
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| 02 00 08 c4 41 44 41 41 34 4d 46 48 | "ADAA4MFH"
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| 00 00 09 | (end of object)
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Error Message
| 03 00 00 00 00 00 9e 14 00 00 00 00 | (rtmp header)
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| 02 00 06 5f 65 72 72 6f 72 | "error"
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| 00 3f f0 00 00 00 00 00 00 05 | (a double)
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| 03 | (start object)
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| 00 05 6c 65 76 65 6c | "level"
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| 02 00 05 65 72 72 6f 72 | "error"
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| 00 04 63 6f 64 65 | "code"
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| 02 00 1e 4e 65 74 43 6f 6e 6e 65 63 74 69 6f 6e 2e 43 6f 6e 6e 65 63 74 2e 52 65 6a 65 63 74 65 64 | "NetConnection.Connect.Rejected"
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| 00 0b 64 65 73 63 72 69 70 74 69 6f 6e | "description"
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| 02 00 41 5b 20 53 65 72 76 65 72 2e 52 65 6a 65 63 74 20 5d 20 3a 20 56 69 72 74 75 61 6c 20 68 6f 73 74 20 5f 64 65 66 61 c3 75 6c 74 56 48 6f 73 74 5f 20 69 73 20 6e 6f 74 20 61 76 61 69 6c 61 62 6c 65 2e | "A[ Server.Reject ] : Virtual host _default VHost_ is not available"
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| 00 00 09 | (end of object)
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Close Message
| 03 00 00 00 00 00 12 14 00 00 00 00 | (rtmp header)
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| 02 00 05 63 6c 6f 73 65 | "close"
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| 00 00 00 00 00 00 00 00 00 05 | (a double)
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BW Done Message
| 03 00 00 00 00 00 15 14 00 00 00 00 | (rtmp header)
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| 02 00 08 6f 6e 42 57 44 6f 6e 65 | "onBWDone"
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| 00 00 00 00 00 00 00 00 00 05 | (a double)
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