[Live-devel] Run openrtsp from another program

[Nicolas Julien]

I found the solution.
For those who would need to do the same:

SECURITY_ATTRIBUTES sa;
char filename[MAX_PATH];
char errfile[MAX_PATH];
char szCdeLine[1024];
DWORD dwErr, dwFlags;

ZeroMemory(&sa, sizeof(sa));
sa.nLength = sizeof(sa);
sa.bInheritHandle = true;
sa.lpSecurityDescriptor = NULL;

strcpy(filename, "e:\\tmp\\video.tmp");
HANDLE hStdOut = CreateFileA(filename, GENERIC_WRITE, FILE_SHARE_WRITE | FILE_SHARE_READ, &sa, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);

strcpy(errfile, "e:\\tmp\\stderr.txt");
HANDLE hStdErr = CreateFile(errfile, GENERIC_WRITE, FILE_SHARE_WRITE | FILE_SHARE_READ, &sa, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);

PROCESS_INFORMATION pi;
STARTUPINFOA si;

ZeroMemory(&pi, sizeof(pi));
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
si.dwFlags |= STARTF_USESTDHANDLES;
si.hStdInput = NULL;
si.hStdOutput = hStdOut;
si.hStdError = hStdErr;

strcpy(szCdeLine, "openrtsp ");
strcat(szCdeLine, "-b 400000 ");
strcat(szCdeLine, "-u admin admin1234 ");
strcat(szCdeLine, "-v ");
strcat(szCdeLine, "-d 40 ");
strcat(szCdeLine, "-U 20201015T162020Z ");
strcat(szCdeLine, "\"rtsp://192.168.1.174:554/Streaming/Tracks/101\<http://192.168.1.174:554/Streaming/Tracks/101%5C>" ");

dwFlags = CREATE_NO_WINDOW;
CreateProcessA(NULL, szCdeLine, NULL, NULL, TRUE, dwFlags, NULL, NULL, &si, &pi);
WaitForSingleObject(pi.hProcess, INFINITE);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
CloseHandle(hStdOut);
CloseHandle(hStdErr);


Once this code has been executed, you get a .tmp file which contains the record of the rtsp stream and a .txt file which contains the result of StdErr.
Thanks to Kyle for getting me on the good way.

________________________________
De : live-devel [live-devel-bounces at us.live555.com] de la part de Nicolas Julien [nicolas.julien at cdvi.com]
Envoyé : lundi 19 octobre 2020 17:14
À : LIVE555 Streaming Media - development & use
Objet : Re: [Live-devel] Run openrtsp from another program

Hi Kyle,

Thanks for your answer.
I updated my code, following the example given.
Still nothing on the stdout output.
However, I get the following message on the stderr output:

Usage: E:\cdvi\dev\rad_atrium_video\Win32\Debug\openRTSP.exe [-p <startPortNum>] [-r|-q|-4|-i] [-a|-v] [-V]

As if the syntax of my command was not good, while this same command launched manually works perfectly.


________________________________
De : live-devel [live-devel-bounces at us.live555.com] de la part de Kyle Sebion [ksebion at digitalforces.com]
Envoyé : lundi 19 octobre 2020 14:59
À : LIVE555 Streaming Media - development & use
Objet : Re: [Live-devel] Run openrtsp from another program

https://stackoverflow.com/questions/7018228/how-do-i-redirect-output-to-a-file-with-createprocess might be helpful for you. Probably not a problem with openrtsp.

On Mon, Oct 19, 2020 at 6:43 AM Nicolas Julien <nicolas.julien at cdvi.com<mailto:nicolas.julien at cdvi.com>> wrote:
Hi Ross,

When I run manually openRTSP from a windows console, all is fine.
Now, I'm trying to launch it from a C++ Windows program, but it does not work.
No error, but video file is not generated.

The command line is :
openrtsp.exe -b 400000 -u admin admin1234 -v -d 40 -U 20201015T162020Z "rtsp://192.168.1.174:554/Streaming/Tracks/101<http://192.168.1.174:554/Streaming/Tracks/101>" > e:\tmp\video.tmp

The C code is :

STARTUPINFOA si;
PROCESS_INFORMATION pi;
ZeroMemory(&si, sizeof(si));
si.cb = sizeof si;
ZeroMemory(&pi, sizeof(pi));

GetStartupInfoA(&si);

strcpy(szCdeLine, "-b 400000 ");
strcat(szCdeLine, "-u admin admin1234 ");
strcat(szCdeLine, "-v ");
strcat(szCdeLine, "-d 40 ");
strcat(szCdeLine, "-U 20201015T162020Z ");
strcat(szCdeLine, "\"rtsp://192.168.1.174:554/Streaming/Tracks/101\<http://192.168.1.174:554/Streaming/Tracks/101%5C>" ");
strcat(szCdeLine, "> e:\\tmp\\video.tmp");

if (!CreateProcessA("openRTSP.exe", szCdeLine, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi))
{
err = GetLastError();
throw Exception("openrtsp error";
}

WaitForSingleObject(pi.hProcess, 40000);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);


The C program and openrtsp.exe are in the same directory.

Do you have any idea why it does not work ?

Thanks in advance,
Nicolas
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If you have any additional problems or questions, or if this case needs to be handled more urgently, please see below for contact information.


Thank you.


Kyle Sebion, Digital Forces Corp.



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