[Live-devel] LiveMedia in a Directshow Filter

[Eyal Shveky]

>while(true)

>{

>       fWatchVariable = 0;

>       dummyTask(NULL); // 100ms

>       env->taskScheduler().doEventLoop(&fWatchVariable);

>       if (fWatchVariable = 1)

>       {

>             printf("\nIn While fWatchVariable=%d,",fWatchVariable);

>             if (!mP4LiveSms->mpeg4LiveSource != NULL)

>
mP4LiveSms->mpeg4LiveSource->deliverFrame();

>       }

>}

 

Note that you don't need to test for "if (fWatchVariable == 1)", 

because we return from "doEventLoop()" only if "fWatchVariable" is 

not 0.  (I presume that you have some other thread - not running 

LIVE555 code - that is setting "fWatchVariable" to 1 when new data 

becomes available.)

 

1)  How should I call deliverFrame() from the Main thread(DS Graph in a
Filter) in order to signal my FramedSource that a new frame is arrived.

 

>RTSPClientSession[00E79B20]::handleRequestBytes() read 0 new bytes 

>(of 9836); te

>rminating connection!

 

This is strange.  Your client's TCP connection (for RTSP) has 

unexpectedly ended.  This might not have anything to do with your 

server's new code.

 

I suggest that you first try to run the *unmodified* 

"testOnDemandRTSPServer" demo application on your system - streaming 

from a MPEG-4 Elementary Stream Video - i.e., ".m4e" - file.  Only 

when you get this running correctly, then you can try modifying it to 

stream from another kind of input source object.

-- 

2) I did, testOnDemandRTSPServer works fine I'm streaming the test.m4e
into VLC player on more than one Pc on a local net.

  The problem is to stream from a live DirectShow filter, I think it's
something with synchronized both threads and signaling to live lib when
I'm getting a new frame , for the FramedSource::deliverFrame to take the
global frame buffer, frame size,etc.

 

3) Question about the parameters : fPresentationTime,
fDurationInMicroseconds what exactly they mean.

  fPresentationTime Is the different between sample(frame) start and
Stop - in my received filter -> pSample->GetTime(&tStart, &tStop);?

  fDurationInMicroseconds - How do I set this parameter? Is it depand if
the stream is VBR or CBR, Or should I set it to 25 fps when I'm using
PAL source?

 

Thanks,

Ross Finlayson

Live Networks, Inc.

http://www.live555.com/

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