Hi,
In the proxyserver implementation i want to dump the frames after i got it
from the client and before it is given to the server. (I do this as a
first step to integrate our transcoder between RTSP client and RTSP
server)
With testRTSPClient.cpp, i was able to add the following code to
DummySink::afterGettingFrame() and successfully dump .h264 frames
"
unsigned char const start_code[4] = {0x00, 0x00, 0x00, 0x01};
if(strcmp(fSubsession.mediumName(),"video") == 0)
{
if (!fHaveWrittenFirstFrame_dummy) {
/* If we have PPS/SPS NAL units encoded in a "sprop parameter
string", prepend these to the file:
*/
unsigned numSPropRecords;
const char* fSPropParameterSetsStr =
fSubsession.fmtp_spropparametersets();
SPropRecord* sPropRecords =
parseSPropParameterSets(fSPropParameterSetsStr, numSPropRecords);
for (unsigned i = 0; i < numSPropRecords; ++i) {
fwrite(start_code, 1, 4, outFP);
fwrite(sPropRecords[i].sPropBytes, 1, sPropRecords[i].sPropLength,
outFP);
}
delete[] sPropRecords;
fHaveWrittenFirstFrame_dummy = True; // for next time
}
fwrite(start_code, 1, 4, outFP);
fwrite(this->fReceiveBuffer,sizeof(char),frameSize,outFP);
}
"
So I tried to add the same code in ProxyServerMediaSession.cpp. There is a
afterGettingFrame as part of PresentationTimeSubsessionNormalizer.
Is this the correct place to modify to dump frames from Client.
Also in PresentationTimeSubsessionNormalizer class i am not able to call
fSubsession.fmtp_spropparametersets();
How will i get SPS+PPS info?
-mugunthan
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