[Live-devel] live555 transcoding jpeg source file and allows other tasks to run

[Armando Ko]

Hi,

 


I am using the live555 to stream JPEG and MPEG2 files
and to run a second thread in my program, I use a function waitSmallTime for
the RTPServer Thread. But I have 2 problems.


 


This is how I configure my waiting function.


 


static char
watchVariable;


 


static void
checkFunc(void* /*clientData*/)
{


  watchVariable = ~0;


}


 


waitSmallTime()


{ 


      //*m_Env
<< "i am waiting 2000 ms ...\n";


      int
uSecsToDelay = 2000000; // (1000 for 1ms)


 


      //
Delay a short period of time before checking again.


      m_Env->taskScheduler().scheduleDelayedTask(uSecsToDelay,


                             
(TaskFunc*)checkFunc, NULL);


      watchVariable = 0;      


   
m_Env->taskScheduler().doEventLoop(&watchVariable); //return


      //
This allows other tasks to run while we're waiting:


}


 


 


Question 1.


 


I stream a real jpeg image with PAL resolution
(768*576) but the quality of the image is not gut on client. I´ am using as
client the Mplayer and I can see that my PAL jpeg image is deform or distort. I
want to know if the live555 trans codes the source for example JPEG to MJPEG or
not. An other thesis is that the Mplayer do that.


 


Question 2.


 


I try to
stream the MPEG2 files so, one thread send the filename to the RTSPServer
(live555) thread, in FAQ I have a tip to use the watchvariable, I do that with
my function see at the top if I put the
uSecsToDelay = 2000000; I can stream one short video (6 sec) an the RTSPServer
crash (bug) if configure so uSecsToDelay = 9000000 the RTSPServer can play the
video for a long time and the bug are coming.


 


To stream the JPEG files, I needed to make
uSecsToDelay = 2000000; if the waiting time is smaller than 2ms the RTSPServer
crash.


 


I should know, where I do a mistake in the using of
the waitsmallTime or watchvariable. 


 


Thanks!


Armand






	

	
		
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