[Live-devel] Questions about project to dump Images frames from H264 stream using live555 and ffmpeg

[David Scravaglieri]

If I add the following code:

    const char* pSpropParamSets = fSubsession.fmtp_spropparametersets();
    if (pSpropParamSets != NULL)
        cout << "pSpropParamSets = " << pSpropParamSets << endl;
    else
        cout << "pSpropParamSets = NULL" << endl;
    
    const char* pSavedSDPLines = fSubsession.savedSDPLines();
    if (pSavedSDPLines != NULL)
        cout << "pSavedSDPLines = " << pSavedSDPLines << endl;
    else
        cout << "pSavedSDPLines = NULL" << endl;

the output is:
pSpropParamSets = NULL
pSavedSDPLines = m=video 0 RTP/AVP 33
a=control:rtsp://mafreebox.freebox.fr/fbxtv_pub/stream?namespace=1&service=620&flavour=ld


Le 2 mars 2012 à 21:14, Ross Finlayson a écrit :

>> I have added the following lines into "afterGettingFrame" method.
>> 
>> unsigned numSPropRecords;
>> SPropRecord* sPropRecords = parseSPropParameterSets(fSubsession.fmtp_spropparametersets(), numSPropRecords);
>> 
>> numSPropRecords is always 0
>> and sPropsRecords is always NULL
> 
> That's probably because "fmtp_spropparametersets()" returned NULL, which suggests that the stream's SDP description - for some reason - did not contain a proper "a=fmtp: ..." line.  To help figure out what's going wrong, please let us know the stream's SDP description, and also the result of calling "fmtp_spropparametersets()".
> 
> Ross Finlayson
> Live Networks, Inc.
> http://www.live555.com/
> 
> _______________________________________________
> live-devel mailing list
> live-devel at lists.live555.com
> http://lists.live555.com/mailman/listinfo/live-devel

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