[gst-devel] timestamp and gstrtph264pay.c

arnabsamanta arnabsamanta at tataelxsi.co.in
Fri Dec 5 12:18:28 CET 2008

Hi Eric Zhang,
        Thanks a lot for your response.
        Yes thats the place where timestamp is getting modified.
        The function is defined in
gst-plugins-base/gst-libs/gst/rtp/gstbasertppayload.c .
  -----Original Message-----
  From: Eric Zhang [mailto:nicolas.m.zhang at gmail.com]
  Sent: Thursday, December 04, 2008 7:43 AM
  To: arnabsamanta at tataelxsi.co.in; Discussion of the development of
  Subject: Re: [gst-devel] timestamp and gstrtph264pay.c

  Hi, gstreamer-devel:

      Seems "gst_basertppayload_push" assigned timestamp to the GstBuffer.
Check this function, arnabsamanta?

  Eric Zhang

  2008/12/2 arnabsamanta <arnabsamanta at tataelxsi.co.in>

     Hi ,
           I Am using the rtph264pay plugin in gst-plugins-good-0.10.11.
           I am unable to understand the timestamp logic in it.

           to my understandings and observations,
                   we are extracting the timestamp value from the incoming
buffer in "
    gst_rtp_h264_pay_handle_buffer" function
                   and this value is passed to the
"gst_rtp_h264_pay_payload_nal" function as
    an argument and further assigned to             the outgoing buffer
pointer "outbuf".

                   before doing the " gst_basertppayload_push " of the
"outbuf " , we are
    calling "gst_rtp_buffer_get_payload "           defined in the
    gstrtpbuffer.c .

                   when i printed the value of the timestamp of the incoming
buffer , it was
    found to be -1.

                   Any where in the code flow , am unable to track the
portion where the
    timestamp change is done.

           Can anybody kindly help me to point out the part i might have
overlooked ?
           and thanks for spending your valuable time to read this long mail


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