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...
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