[Live-devel] Presentaition time problem at H264 streams

[6.45 6.45.Vapuru]

Hi

I modify the OpenRtspClient so that

-- Now instead of writing frames to file I collect them in a queue
with incoming presenttaion times
-- Then give the h264 frames to MP4 muxer [ Geraint Davies MP4 mux filter]
-- Finally write muxed data to file...

So I can able to save h264 stream into MP4 container...
But the problem is that, some of the recorded data [NOT all of them]
has wrong values for time duration:
Suppose that a 10 minute record seems that it was 12 h stream...
VLC play the 10 minute that play last  frame for the remaing time.

It seems that i set   sample times wrong into the Muxer...
Then i debug and see that there is positive and negative dramatic
jumps at time stamps...

Here is  how i set time stamps:

-- Firts i take presentationTime from
H264VideoFileSink::afterGettingFrame1 function
-- Then calculate the firstPresentaionTime [ at the beginning]
-- Then collect other timestamps

#define TIMEVAL_TO_REFERENCE_TIME(x) ((__int64)(x.tv_sec * 1000000) +
x.tv_usec) * 10

void  H264VideoFileSink::afterGettingFrame1(unsigned frameSize, struct
timeval presentationTime)
{

    // At the beginning [ just for once calculate firstPresentaionTime ]
	
	firstPresentaionTime = TIMEVAL_TO_REFERENCE_TIME(presentationTime);
	
	// for the other frames collect frames timestamps
	
	frameTimeStamp = TIMEVAL_TO_REFERENCE_TIME(presentationTime) -
firstPresentationTime

}

frameTimeStamp values show dramatic jumps to negative or positive
values...[ i keeep those values as int64 ]

What my cause this?

-- Or is it  agood idea to use this "presentationTime"  for a MP4 Muxer?
-- Where the "presentationTime" is calculated at library?
-- Is it possible that   H264VideoFileSink::afterGettingFrame1 method
"presentationTime" values may be wrong?
-- Anybody record h264 stream in  a mp4 contianer and wanted to share
his/her experience?

Best Wishes
Novalis Vapuru

PS:

By the way i can able to re-write OpenRtspClient in a more OO-way.Each
client has its own envr and scheduler...
So i can start many of them programatically in a multithreaded way...
Just simple as

  string rtspUrl = "xxxxx";

  New_OO_OpenRtspClient* client = new   New_OO_OpenRtspClient(rtspUrl);

  client->Start();
  client->Shutdown();

 But I think there is still some memory leaks at my Shutdown
method...Some sources not "cleanup"...

 Hope, for the next release we will see more OO way written
OpenRtspClient example at Live555...