# Using librtmp library to publish a live stream to Wowza Media Server **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [December 24, 2010, 12:04pm UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914 "2010-12-24T12:04:25Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![dhruva\_ts](https://avatars.discourse-cdn.com/v4/letter/d/3d9bf3/32.png) [@dhruva\_ts](https://community.wowza.com/u/dhruva_ts)\ **Post date:** [December 24, 2010, 12:04pm UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914/1 "2010-12-24T12:04:25Z")
Hi, How to publish a stream using librtmp library? I read the librtmp man page and for publishing , RTMP\_Write() is used. I am using C/C++ for my application. //Code //Init RTMP code RTMP \*r; char uri[]=“rtmp://localhost:1935/live/desktop”; r= RTMP\_Alloc(); RTMP\_Init®; RTMP\_SetupURL(r, (char\*)uri); RTMP\_EnableWrite®; // To publish a stream, enable write support before connect RTMP\_Connect(r, NULL); RTMP\_ConnectStream(r,0); Then to respond to ping/other messages from server, I am using a thread to respond like following: //Thread While (ThreadIsRunning && RTMP\_IsConnected® && RTMP\_ReadPacket(r, &packet)) { if (RTMPPacket\_IsReady(&packet)) { if (!packet.m\_nBodySize) continue; RTMP\_ClientPacket(r, &packet); //This takes care of handling ping/other messages RTMPPacket\_Free(&packet); } } After this I am stuck at how to use RTMP\_Write() to publish a file to Wowza media server. I searched in google and most applications are in Java or Python or C# which I don’t understand. Please help me. Thanks, Dhruva ---
**Author:** ![Steve\_McFarlin](https://avatars.discourse-cdn.com/v4/letter/s/aca169/32.png) [@Steve\_McFarlin](https://community.wowza.com/u/Steve_McFarlin)\ **Post date:** [December 26, 2010, 11:09am UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914/2 "2010-12-26T11:09:31Z")
Have you tried opening up a FLV file and feeding it into this function? I see this in the function if (buf[0] == ‘F’ && buf[1] == ‘L’ && buf[2] == ‘V’) If you get really stuck I suggest you configure/compile FFmpeg with --enable-librtmp and see how it is using the library. It may also help to read the RTMP specification from Adobe. For testing against FFmpeg: If you set av\_log\_set\_level(AV\_LOG\_DEBUG) in ffmpeg.c and also enable RTMP\_LOGALL in librtmp for your application then the debug outputs should look at least similar. At the very least it should help you narrow down what to do, and what you may be doing wrong. ---
**Author:** ![Ronen\_Burin-Rogel](https://avatars.discourse-cdn.com/v4/letter/r/2bfe46/32.png) [@Ronen\_Burin-Rogel](https://community.wowza.com/u/Ronen_Burin-Rogel)\ **Post date:** [December 2, 2013, 9:03am UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914/3 "2013-12-02T09:03:52Z")
Hi, Did you get an answer or solve this issue? I’m facing the same issue - stuck in he phase of writing RTMP packets using librtmp. Can you/someone else assist? Thanks, ---
**Author:** ![Sorin\_Vasilescu](https://avatars.discourse-cdn.com/v4/letter/s/c57346/32.png) [@Sorin\_Vasilescu](https://community.wowza.com/u/Sorin_Vasilescu)\ **Post date:** [May 19, 2011, 12:50pm UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914/4 "2011-05-19T12:50:36Z")
Hey, guys, Any update on this? I’d be interested in streaming to Wowza with librtmp also. Thanks, Sorin. ---
**Author:** ![Steve\_McFarlin](https://avatars.discourse-cdn.com/v4/letter/s/aca169/32.png) [@Steve\_McFarlin](https://community.wowza.com/u/Steve_McFarlin)\ **Post date:** [December 26, 2010, 11:23pm UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914/5 "2010-12-26T23:23:04Z")
I don’t work directly with RTMP. About as far as I have gone is to patch it and fix a few bugs. Here is a dump from the library. You may get a better response to your message on the rtmpdump/librtmp dev list. Ignore the ‘test.sdp’. I am not sending a sdp. This is just left over from RTSP testing, and I am lazy. Login dump ```auto DEBUG: Parsing... DEBUG: Parsed protocol: 0 DEBUG: Parsed host : 192.168.1.50 DEBUG: Parsed app : rtplive DEBUG: RTMP_Connect1, ... connected, handshaking DEBUG: HandShake: Type Answer : 03 DEBUG: HandShake: Server Uptime : 96850052 DEBUG: HandShake: FMS Version : 3.0.1.1 DEBUG: HandShake: Handshaking finished.... DEBUG: RTMP_Connect1, handshaked DEBUG2: RTMP_SendPacket: fd=7, size=143 DEBUG2: 0000: 03 00 00 00 00 00 8f 14 00 00 00 00 ............ DEBUG2: 0000: 02 00 07 63 6f 6e 6e 65 63 74 00 3f f0 00 00 00 ...connect.?.... DEBUG2: 0010: 00 00 00 03 00 03 61 70 70 02 00 07 72 74 70 6c ......app...rtpl DEBUG2: 0020: 69 76 65 00 04 74 79 70 65 02 00 0a 6e 6f 6e 70 ive..type...nonp DEBUG2: 0030: 72 69 76 61 74 65 00 08 66 6c 61 73 68 56 65 72 rivate..flashVer DEBUG2: 0040: 02 00 1f 46 4d 4c 45 2f 33 2e 30 10 28 63 6f 6d ...FMLE/3.0.(com DEBUG2: 0050: 70 61 74 69 62 6c 65 3b 10 46 4d 53 63 2f 31 2e patible;.FMSc/1. DEBUG2: 0060: 30 29 00 05 74 63 55 72 6c 02 00 20 72 74 6d 70 0)..tcUrl.. rtmp DEBUG2: 0070: 3a 2f 2f 31 39 32 2e 31 36 38 2e 31 2e 35 30 3a ://192.168.1.50: DEBUG2: 0000: c3 . DEBUG2: 0000: 31 39 33 35 2f 72 74 70 6c 69 76 65 00 00 09 1935/rtplive... DEBUG: Invoking connect DEBUG2: RTMP_ReadPacket: fd=7 DEBUG2: 0000: 02 00 00 00 00 00 04 05 00 00 00 00 ............ DEBUG2: 0000: 00 26 25 a0 .&%. DEBUG: HandleServerBW: server BW = 2500000 DEBUG2: RTMP_ReadPacket: fd=7 DEBUG2: 0000: 02 00 00 00 00 00 05 06 00 00 00 00 ............ DEBUG2: 0000: 00 26 25 a0 02 .&%.. DEBUG: HandleClientBW: client BW = 2500000 2 DEBUG2: RTMP_ReadPacket: fd=7 DEBUG2: 0000: 02 00 00 00 00 00 06 04 00 00 00 00 ............ DEBUG2: 0000: 00 00 00 00 00 00 ...... DEBUG: HandleCtrl, received ctrl. type: 0, len: 6 DEBUG: HandleCtrl, Stream Begin 0 DEBUG2: RTMP_ReadPacket: fd=7 DEBUG2: 0000: 02 00 00 00 00 00 04 01 00 00 00 00 ............ DEBUG2: 0000: 00 00 02 00 .... DEBUG: HandleChangeChunkSize, received: chunk size change to 512 DEBUG2: RTMP_ReadPacket: fd=7 DEBUG2: 0000: 03 00 00 00 00 01 03 14 00 00 00 00 ............ DEBUG2: 0000: 02 00 07 5f 72 65 73 75 6c 74 00 3f f0 00 00 00 ..._result.?.... DEBUG2: 0010: 00 00 00 03 00 06 66 6d 73 56 65 72 02 00 0d 46 ......fmsVer...F DEBUG2: 0020: 4d 53 2f 33 2c 35 2c 32 2c 36 35 34 00 0c 63 61 MS/3,5,2,654..ca DEBUG2: 0030: 70 61 62 69 6c 69 74 69 65 73 00 40 3f 00 00 00 pabilities.@?... DEBUG2: 0040: 00 00 00 00 04 6d 6f 64 65 00 3f f0 00 00 00 00 .....mode.?..... DEBUG2: 0050: 00 00 00 00 09 03 00 05 6c 65 76 65 6c 02 00 06 ........level... DEBUG2: 0060: 73 74 61 74 75 73 00 04 63 6f 64 65 02 00 1d 4e status..code...N DEBUG2: 0070: 65 74 43 6f 6e 6e 65 63 74 69 6f 6e 2e 43 6f 6e etConnection.Con DEBUG2: 0080: 6e 65 63 74 2e 53 75 63 63 65 73 73 00 0b 64 65 nect.Success..de DEBUG2: 0090: 73 63 72 69 70 74 69 6f 6e 02 00 15 43 6f 6e 6e scription...Conn DEBUG2: 00a0: 65 63 74 69 6f 6e 20 73 75 63 63 65 65 64 65 64 ection succeeded DEBUG2: 00b0: 2e 00 04 64 61 74 61 08 00 00 00 00 00 07 76 65 ...data.......ve DEBUG2: 00c0: 72 73 69 6f 6e 02 00 09 33 2c 35 2c 32 2c 36 35 rsion...3,5,2,65 DEBUG2: 00d0: 34 00 00 09 00 08 63 6c 69 65 6e 74 69 64 00 41 4.....clientid.A DEBUG2: 00e0: a0 ac 26 9a 00 00 00 00 0e 6f 62 6a 65 63 74 45 ..&......objectE DEBUG2: 00f0: 6e 63 6f 64 69 6e 67 00 00 00 00 00 00 00 00 00 ncoding......... DEBUG2: 0100: 00 00 09 ... DEBUG: RTMP_ClientPacket, received: invoke 259 bytes DEBUG: (object begin) DEBUG: (object begin) DEBUG: Property: DEBUG: Property: DEBUG: Property: DEBUG: (object end) DEBUG: (object begin) DEBUG: Property: DEBUG: Property: DEBUG: Property: DEBUG: Property: DEBUG: (object begin) DEBUG: Property: DEBUG: (object end) DEBUG: Property: DEBUG: Property: DEBUG: (object end) DEBUG: (object end) DEBUG: HandleInvoke, server invoking <_result> DEBUG: HandleInvoke, received result for method call DEBUG2: RTMP_SendPacket: fd=7, size=37 DEBUG2: 0000: 43 00 00 00 00 00 25 14 C.....%. DEBUG2: 0000: 02 00 0d 72 65 6c 65 61 73 65 53 74 72 65 61 6d ...releaseStream DEBUG2: 0010: 00 40 00 00 00 00 00 00 00 05 02 00 08 74 65 73 .@...........tes DEBUG2: 0020: 74 2e 73 64 70 t.sdp DEBUG: Invoking releaseStream DEBUG2: RTMP_SendPacket: fd=7, size=33 DEBUG2: 0000: 43 00 00 00 00 00 21 14 C.....!. DEBUG2: 0000: 02 00 09 46 43 50 75 62 6c 69 73 68 00 40 08 00 ...FCPublish.@.. DEBUG2: 0010: 00 00 00 00 00 05 02 00 08 74 65 73 74 2e 73 64 .........test.sd DEBUG2: 0020: 70 p DEBUG: Invoking FCPublish DEBUG2: RTMP_SendPacket: fd=7, size=25 DEBUG2: 0000: 43 00 00 00 00 00 19 14 C....... DEBUG2: 0000: 02 00 0c 63 72 65 61 74 65 53 74 72 65 61 6d 00 ...createStream. DEBUG2: 0010: 40 10 00 00 00 00 00 00 05 @........ DEBUG: Invoking createStream DEBUG2: RTMP_ReadPacket: fd=7 DEBUG2: 0000: 03 00 00 00 00 00 1d 14 00 00 00 00 ............ DEBUG2: 0000: 02 00 07 5f 72 65 73 75 6c 74 00 40 10 00 00 00 ..._result.@.... DEBUG2: 0010: 00 00 00 05 00 3f f0 00 00 00 00 00 00 .....?....... DEBUG: RTMP_ClientPacket, received: invoke 29 bytes DEBUG: (object begin) DEBUG: Property: NULL DEBUG: (object end) DEBUG: HandleInvoke, server invoking <_result> DEBUG: HandleInvoke, received result for method call DEBUG2: RTMP_SendPacket: fd=7, size=38 DEBUG2: 0000: 04 00 00 00 00 00 26 14 01 00 00 00 ......&..... DEBUG2: 0000: 02 00 07 70 75 62 6c 69 73 68 00 40 14 00 00 00 ...publish.@.... DEBUG2: 0010: 00 00 00 05 02 00 08 74 65 73 74 2e 73 64 70 02 .......test.sdp. DEBUG2: 0020: 00 04 6c 69 76 65 ..live DEBUG: Invoking publish DEBUG2: RTMP_ReadPacket: fd=7 DEBUG2: 0000: 02 00 00 00 00 00 06 04 00 00 00 00 ............ DEBUG2: 0000: 00 00 00 00 00 01 ...... DEBUG: HandleCtrl, received ctrl. type: 0, len: 6 DEBUG: HandleCtrl, Stream Begin 1 DEBUG2: RTMP_ReadPacket: fd=7 DEBUG2: 0000: 03 00 00 00 00 00 80 14 01 00 00 00 ............ DEBUG2: 0000: 02 00 08 6f 6e 53 74 61 74 75 73 00 00 00 00 00 ...onStatus..... DEBUG2: 0010: 00 00 00 00 05 03 00 05 6c 65 76 65 6c 02 00 06 ........level... DEBUG2: 0020: 73 74 61 74 75 73 00 04 63 6f 64 65 02 00 17 4e status..code...N DEBUG2: 0030: 65 74 53 74 72 65 61 6d 2e 50 75 62 6c 69 73 68 etStream.Publish DEBUG2: 0040: 2e 53 74 61 72 74 00 0b 64 65 73 63 72 69 70 74 .Start..descript DEBUG2: 0050: 69 6f 6e 02 00 14 50 75 62 6c 69 73 68 69 6e 67 ion...Publishing DEBUG2: 0060: 20 74 65 73 74 2e 73 64 70 2e 00 08 63 6c 69 65 test.sdp...clie DEBUG2: 0070: 6e 74 69 64 00 41 a0 ac 26 9a 00 00 00 00 00 09 ntid.A..&....... DEBUG: RTMP_ClientPacket, received: invoke 128 bytes DEBUG: (object begin) DEBUG: Property: NULL DEBUG: (object begin) DEBUG: Property: DEBUG: Property: DEBUG: Property: DEBUG: Property: DEBUG: (object end) DEBUG: (object end) DEBUG: HandleInvoke, server invoking DEBUG: HandleInvoke, onStatus: NetStream.Publish.Start ``` Data Packets ```auto DEBUG2: RTMP_SendPacket: fd=7, size=327 DEBUG2: 0000: 04 00 00 00 00 01 47 12 01 00 00 00 ......G..... DEBUG2: 0000: 02 00 0d 40 73 65 74 44 61 74 61 46 72 61 6d 65 ...@setDataFrame DEBUG2: 0010: 02 00 0a 6f 6e 4d 65 74 61 44 61 74 61 08 00 00 ...onMetaData... DEBUG2: 0020: 00 0c 00 08 64 75 72 61 74 69 6f 6e 00 00 00 00 ....duration.... DEBUG2: 0030: 00 00 00 00 00 00 05 77 69 64 74 68 00 40 68 00 .......width.@h. DEBUG2: 0040: 00 00 00 00 00 00 06 68 65 69 67 68 74 00 40 62 .......height.@b DEBUG2: 0050: 00 00 00 00 00 00 00 0d 76 69 64 65 6f 64 61 74 ........videodat DEBUG2: 0060: 61 72 61 74 65 00 40 60 c5 a0 00 00 00 00 00 09 arate.@`........ DEBUG2: 0070: 66 72 61 6d 65 72 61 74 65 00 40 82 c0 00 00 00 framerate.@..... DEBUG2: 0000: c4 . DEBUG2: 0000: 00 00 00 0c 76 69 64 65 6f 63 6f 64 65 63 69 64 ....videocodecid DEBUG2: 0010: 00 40 1c 00 00 00 00 00 00 00 0d 61 75 64 69 6f .@.........audio DEBUG2: 0020: 64 61 74 61 72 61 74 65 00 40 3f 16 00 00 00 00 datarate.@?..... DEBUG2: 0030: 00 00 0f 61 75 64 69 6f 73 61 6d 70 6c 65 72 61 ...audiosamplera DEBUG2: 0040: 74 65 00 40 e5 88 80 00 00 00 00 00 0f 61 75 64 te.@.........aud DEBUG2: 0050: 69 6f 73 61 6d 70 6c 65 73 69 7a 65 00 40 30 00 iosamplesize.@0. DEBUG2: 0060: 00 00 00 00 00 00 06 73 74 65 72 65 6f 01 00 00 .......stereo... DEBUG2: 0070: 0c 61 75 64 69 6f 63 6f 64 65 63 69 64 00 40 24 .audiocodecid.@$ DEBUG2: 0000: c4 . DEBUG2: 0000: 00 00 00 00 00 00 00 0b 6d 61 6a 6f 72 5f 62 72 ........major_br DEBUG2: 0010: 61 6e 64 02 00 04 71 74 20 20 00 07 65 6e 63 6f and...qt ..enco DEBUG2: 0020: 64 65 72 02 00 0b 4c 61 76 66 35 32 2e 38 37 2e der...Lavf52.87. DEBUG2: 0030: 31 00 08 66 69 6c 65 73 69 7a 65 00 00 00 00 00 1..filesize..... DEBUG2: 0040: 00 00 00 00 00 00 09 ....... DEBUG2: RTMP_SendPacket: fd=7, size=29 DEBUG2: 0000: 04 00 00 00 00 00 1d 09 01 00 00 00 ............ DEBUG2: 0000: 17 00 00 00 00 01 42 00 1e ff e1 00 09 67 42 00 ......B......gB. DEBUG2: 0010: 1e 8d 68 30 4e 40 01 00 04 68 ce 09 c8 ..h0N@...h... DEBUG2: RTMP_SendPacket: fd=7, size=4 DEBUG2: 0000: 04 00 00 00 00 00 04 08 01 00 00 00 ............ DEBUG2: 0000: af 00 12 08 .... DEBUG2: RTMP_SendPacket: fd=7, size=6 DEBUG2: 0000: 04 00 00 00 00 00 06 08 01 00 00 00 ............ DEBUG2: 0000: af 01 00 88 40 07 ....@. DEBUG2: RTMP_SendPacket: fd=7, size=175 DEBUG2: 0000: 44 00 00 17 00 00 af 08 D....... DEBUG2: 0000: af 01 00 f4 93 fe cc f2 00 00 00 00 00 07 13 f7 ................ DEBUG2: 0010: 8e 06 1a 90 1b 56 44 f4 d0 0f 48 ee bf 2a fb 97 .....VD...H..*.. DEBUG2: 0020: 9f fd 4b bc ee e0 1d cf c3 f9 af 27 fa 77 4f f0 ..K........'.wO. DEBUG2: 0030: bf 0c 01 f1 be cf d7 3e 3b 9e 87 ac 7f 76 00 f5 .......>;....v.. DEBUG2: 0040: bd 5f 5d f0 9d 86 cf 2d ec 80 00 3d 6f a4 f7 be ._]....-...=o... DEBUG2: 0050: ab b8 68 f7 1f 5b e3 fa cf 2b d6 bf 8b ec be a7 ..h..[...+...... DEBUG2: 0060: ce 00 00 e0 e9 d7 8c f8 c7 49 dd 74 bb 5f 3f ec .........I.t._?. DEBUG2: 0070: 3c cf 69 e3 be 7d e3 40 00 38 19 e9 f4 11 af fa <.i..}.@.8...... DEBUG2: 0000: c4 . DEBUG2: 0000: 76 b7 03 a2 af 0b d1 fa 57 96 ec 40 00 00 39 3c v.......W..@..9< DEBUG2: 0010: 3e 26 87 2f b9 fd 77 a5 f7 bf 0f fd df b8 6b f9 >&./..w.......k. DEBUG2: 0020: ae e9 e1 be 1b c0 f4 fd 67 87 e2 f8 2e 93 07 ........g...... DEBUG2: RTMP_SendPacket: fd=7, size=3764 DEBUG2: 0000: 44 00 00 13 00 0e b4 09 D....... DEBUG2: 0000: 17 01 00 00 00 00 00 0e ab 65 b8 00 04 17 ff ff .........e...... DEBUG2: 0010: c6 08 82 22 80 00 86 ef 92 88 c4 3d c8 5f 01 d7 ...".......=._.. DEBUG2: 0020: 89 4f ff db 1e ee 2e fe ec b9 9d ef e6 53 c2 00 .O...........S.. DEBUG2: 0030: 0e 3d 65 6d 44 7c df b7 62 3b 01 6f 83 8d 90 a3 .=emD|..b;.o.... DEBUG2: 0040: fe 98 f9 7e 66 31 d3 70 7e fa f6 e8 1b 73 29 1f ...~f1.p~....s). DEBUG2: 0050: 48 c8 95 69 98 06 44 50 3c 66 84 2d f2 4f 92 75 H..i..DP#u....g2.\.. DEBUG2: 0070: 46 df ef bb e6 a9 93 4f 6f 3e 67 64 5a 47 3d aa F......Oo>gdZG=. DEBUG2: 0000: c4 . ``` From the look of this dump I would have to say yes to your question. It looks like the first packet contains this information. ---
**Author:** ![Steve\_McFarlin](https://avatars.discourse-cdn.com/v4/letter/s/aca169/32.png) [@Steve\_McFarlin](https://community.wowza.com/u/Steve_McFarlin)\ **Post date:** [May 28, 2011, 9:05pm UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914/6 "2011-05-28T21:05:59Z")
I started to work directly with librtmp, but I have sense stopped and moved to using RTSP. Take a look at FFmpeg avformat/flvenc.c . This is what all AV data gets piped through before sending to librtmp. There is also avformat/librtmp.c. ---
**Author:** ![dhruva\_ts](https://avatars.discourse-cdn.com/v4/letter/d/3d9bf3/32.png) [@dhruva\_ts](https://community.wowza.com/u/dhruva_ts)\ **Post date:** [December 27, 2010, 9:25am UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914/7 "2010-12-27T09:25:40Z")
Thanks for replying. From Adobe specification, it is required to send the DataMessage containing the metadata(width,height,bit rate…) before sending the Video packets. This is after connect,createStream and publish. Does RTMP\_Write() takes care of sending the DataMesage before sending video packets? Thanks, Dhruva ---
**Author:** ![dhruva\_ts](https://avatars.discourse-cdn.com/v4/letter/d/3d9bf3/32.png) [@dhruva\_ts](https://community.wowza.com/u/dhruva_ts)\ **Post date:** [December 27, 2010, 8:37pm UTC](https://community.wowza.com/t/using-librtmp-library-to-publish-a-live-stream-to-wowza-media-server/35914/8 "2010-12-27T20:37:00Z")
Ok, I will post my queries to rtmpdump mailing list. Thanks for replying, Dhruva