[Live-devel] Help with link error

Wed Aug 6 19:52:57 PDT 2008

Hyee Roland,

Thank you for your help..managed to solve the errors and learn new thing at the same time...now im getting another error when running the openrtsp program from command line:

[cid:image002.png at 01C8F87B.C03BF5C0]

What do I have to do??thank you for your help...do have a working example that I can see(the print screens perhaps)??i want to see how it works..thank you :)

From: live-devel-bounces at ns.live555.com [mailto:live-devel-bounces at ns.live555.com] On Behalf Of Roland
Sent: Thursday, August 07, 2008 2:36 AM
To: 'LIVE555 Streaming Media - development & use'
Subject: Re: [Live-devel] Help with link error

Hi Melvin

Add liveMedia\H263plusVideoRTPSource.cpp and liveMedia\H264VideoFileSink.cpp to your project. That should do it. Similar to like you added "Locale.cpp".

During linking, the Linker will gather all the object files (generated by compiling C or C++ source code) and all the libraries and do a cross-check against all symbols. E.g. if you call a function Foo() in your code, the compiler only sees the signature of the function in some header file: "foo.h: void Foo(void);" There is no code there, just the information on how to call it. During the linking step, the linker will resolve the references and look for compiled code for Foo(), which is either in another object file, or in a library (which is just a 'zip' of a bunch of object files).

cu
roland

From: live-devel-bounces at ns.live555.com [mailto:live-devel-bounces at ns.live555.com] On Behalf Of Melvin_Raj
Sent: Tuesday, August 05, 2008 7:22 PM
To: LIVE555 Streaming Media - development & use
Subject: Re: [Live-devel] Help with link error

Hello..thank you for your help...I managed to reduce the errors down to 3!! :)

1>------ Build started: Project: rtsp, Configuration: Debug Win32 ------
1>Compiling...
1>Locale.cpp
1>Linking...
1>playCommon.obj : error LNK2019: unresolved external symbol "public: static class H264VideoFileSink * __cdecl H264VideoFileSink::createNew(class UsageEnvironment &,char const *,unsigned int,unsigned int)" (?createNew at H264VideoFileSink@@SAPAV1 at AAVUsageEnvironment@@PBDII at Z) referenced in function _main
1>liveMedia.lib(MediaSession.obj) : error LNK2019: unresolved external symbol "public: static class H263plusVideoRTPSource * __cdecl H263plusVideoRTPSource::createNew(class UsageEnvironment &,class Groupsock *,unsigned char,unsigned int)" (?createNew at H263plusVideoRTPSource@@SAPAV1 at AAVUsageEnvironment@@PAVGroupsock@@EI at Z) referenced in function "public: unsigned int __thiscall MediaSubsession::initiate(int)" (?initiate at MediaSubsession@@QAEIH at Z)
1>C:\Documents and Settings\mp74294\My Documents\Visual Studio 2005\Projects\rtsp\Debug\rtsp.exe : fatal error LNK1120: 2 unresolved externals
1>Build log was saved at "file://c:\Documents and Settings\mp74294\My Documents\Visual Studio 2005\Projects\rtsp\rtsp\Debug\BuildLog.htm"
1>rtsp - 3 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

As you said, I tried doin a search for the H264VideoFileSink but it all in the livemedia.hh and also H264VideoFileSink.hh(I have included then in the preprocessor)....how do I go about corercting this error??and btw, once I compile openrtsp, will I be able to receive,play,records the video streams from mpegstreamer??

Thank You soo much for your time in helping :) God blesss...

From: live-devel-bounces at ns.live555.com [mailto:live-devel-bounces at ns.live555.com] On Behalf Of Roland
Sent: Wednesday, August 06, 2008 2:24 AM
To: 'LIVE555 Streaming Media - development & use'
Subject: Re: [Live-devel] Help with link error

Hi Melvin

Do a FindInFiles for the symbols that aren't being resolved, e.g. "tunnelOverHTTPPortNum" or "statusCode". Then figure out if that source file where these variables are being defined is included in the compilation of the .LIB or the final .EXE. Add the corresponding source file to one of those projects and recompile. E.g. for the "tunnelOverHTTPPortNum" variable, you'll find "extern" references and one real declaration in testProgs\playCommon.cpp. Add playCommon.cpp to resolve this issue.

Same goes for the other unresolved symbols. e.g. class "Locale" is defined in "liveMedia\Locale.cpp"...

cu
Roland

From: live-devel-bounces at ns.live555.com [mailto:live-devel-bounces at ns.live555.com] On Behalf Of Melvin_Raj
Sent: Tuesday, August 05, 2008 3:04 AM
To: live-devel at lists.live555.com
Subject: [Live-devel] Help with link error

hello....im new to this forum...im trying to build live555's test prog, specificly the openrtsp...i am able to build the mpegsender,mp3sender and receiver respectively witout any errors but when i try to build openrtsp, i get the following errors:

1>------ Rebuild All started: Project: rtsp, Configuration: Debug Win32 ------
1>Deleting intermediate and output files for project 'rtsp', configuration 'Debug|Win32'
1>Compiling...
1>openRTSP.cpp
1>Compiling manifest to resources...
1>Linking...
1>openRTSP.obj : error LNK2001: unresolved external symbol "unsigned short tunnelOverHTTPPortNum" (?tunnelOverHTTPPortNum@@3GA)
1>openRTSP.obj : error LNK2001: unresolved external symbol "unsigned int statusCode" (?statusCode@@3IA)
1>openRTSP.obj : error LNK2001: unresolved external symbol "double duration" (?duration@@3NA)
1>openRTSP.obj : error LNK2001: unresolved external symbol "double scale" (?scale@@3NA)
1>openRTSP.obj : error LNK2001: unresolved external symbol "double initialSeekTime" (?initialSeekTime@@3NA)
1>liveMedia.lib(RTSPClient.obj) : error LNK2019: unresolved external symbol "public: virtual __thiscall Locale::~Locale(void)" (??1Locale@@UAE at XZ) referenced in function "char * __cdecl createScaleString(float,float)" (?createScaleString@@YAPADMM at Z)
1>liveMedia.lib(MediaSession.obj) : error LNK2001: unresolved external symbol "public: virtual __thiscall Locale::~Locale(void)" (??1Locale@@UAE at XZ)
1>liveMedia.lib(RTSPCommon.obj) : error LNK2001: unresolved external symbol "public: virtual __thiscall Locale::~Locale(void)" (??1Locale@@UAE at XZ)
1>liveMedia.lib(RTSPClient.obj) : error LNK2019: unresolved external symbol "public: __thiscall Locale::Locale(char const *,int)" (??0Locale@@QAE at PBDH@Z) referenced in function "char * __cdecl createScaleString(float,float)" (?createScaleString@@YAPADMM at Z)
1>liveMedia.lib(MediaSession.obj) : error LNK2001: unresolved external symbol "public: __thiscall Locale::Locale(char const *,int)" (??0Locale@@QAE at PBDH@Z)
1>liveMedia.lib(RTSPCommon.obj) : error LNK2001: unresolved external symbol "public: __thiscall Locale::Locale(char const *,int)" (??0Locale@@QAE at PBDH@Z)
1>liveMedia.lib(MediaSession.obj) : error LNK2019: unresolved external symbol "public: static class H263plusVideoRTPSource * __cdecl H263plusVideoRTPSource::createNew(class UsageEnvironment &,class Groupsock *,unsigned char,unsigned int)" (?createNew at H263plusVideoRTPSource@@SAPAV1 at AAVUsag eEnvironment@@PAVGroupsock@@EI at Z) referenced in function "public: unsigned int __thiscall MediaSubsession::initiate(int)" (?initiate at MediaSubsession@@QAEIH at Z)
1>MSVCRTD.lib(crtexe.obj) : error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup
1>C:\Documents and Settings\mp74294\My Documents\Visual Studio 2005\Projects\rtsp\Debug\rtsp.exe : fatal error LNK1120: 9 unresolved externals
1>Build log was saved at "file://c:\Documents and Settings\mp74294\My Documents\Visual Studio 2005\Projects\rtsp\rtsp\Debug\BuildLog.htm"
1>rtsp - 14 error(s), 0 warning(s)
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped

i've already added the required lib: wsock32.lib BasicUsageEnvironment.lib groupsock.lib liveMedia.lib UsageEnvironment.lib

any help in pointing me towards the proper direction will be appreciated [cid:image003.gif at 01C8F87B.C03BF5C0] thank you in advance....God bless...

ps: im trying to build an rtp receiver that will be able to play streaming files from a server...

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