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    Hey,<br>
    <br>
    Try specifying a host on the udpsink and an address on the udpsrc,
    these pipelines work for me:<br>
    <br>
    Receiver:<br>
    <br>
    gst-launch-1.0 udpsrc caps="application/x-rtp" address=127.0.0.1 !
    rtph264depay ! h264parse ! avdec_h264 ! videoconvert ! queue !
    xvimagesink<br>
    <br>
    Sender:<br>
    <br>
    gst-launch-1.0 filesrc location=/home/meh/Videos/small_ball.mp4 !
    qtdemux ! h264parse ! rtph264pay ! udpsink host=127.0.0.1<br>
    <br>
    <div class="moz-cite-prefix">On 8/21/19 10:49 AM, Du Dengke wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAKHP1dszq_2vD3qC+72HbcML1U-k1QqotyP1vnO1P5bdQNXzKQ@mail.gmail.com">
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        <div>Hi experts:</div>
        OS: Ubuntu 16.04.6 LTS<br>
        <div>Gstreamer Version: I update it to 1.16.0</div>
        <div><br>
        </div>
        <div>Sender and Receiver both on one machine.</div>
        <div><br>
        </div>
        <div>Sender:</div>
        <div>    GST_DEBUG=4 gst-launch-1.0 filesrc location=easy_c.mp4
          ! qtdemux ! h264parse ! rtph264pay ! udpsink<br>
        </div>
        <div>I using wireshark to watch, all thing go well, something
          like:</div>
        <div>    ......</div>
        <div>    31072 121.161706931 127.0.0.1 127.0.0.1 UDP 1442 51378
          → 5004 Len=1400</div>
        <div>    ......</div>
        <div><br>
        </div>
        <div>Receiver:</div>
        <div>    GST_DEBUG=4 gst-launch-1.0 udpsrc
          caps="application/x-rtp" ! rtph264depay ! h264parse !
          avdec_h264 ! xvimagesink</div>
        <div><br>
        </div>
        <div>seems go well, but nothing appear, I take some log here:</div>
        <div>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</div>
        <div>Setting pipeline to PLAYING ...<br>
          0:00:00.020110200  4381      0x202cc00 INFO              
          GST_EVENT gstevent.c:1450:gst_event_new_latency: creating
          latency event 0:00:00.000000000<br>
          0:00:00.020125274  4381      0x202cc00 INFO                  
            bin gstbin.c:2780:gst_bin_do_latency_func:<pipeline0>
          configured latency of 0:00:00.000000000<br>
          0:00:00.020136579  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2503:gst_bin_element_set_state:<xvimagesink0>
          current READY pending PAUSED, desired next PLAYING<br>
          0:00:00.020142248  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2957:gst_bin_change_state_func:<pipeline0>
          child 'xvimagesink0' is changing state asynchronously to
          PLAYING<br>
          0:00:00.020148377  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2503:gst_bin_element_set_state:<avdec_h264-0>
          current PAUSED pending VOID_PENDING, desired next PLAYING<br>
          0:00:00.020154187  4381      0x202cc00 INFO            
           GST_STATES
          gstelement.c:2676:gst_element_continue_state:<avdec_h264-0>
          completed state change to PLAYING<br>
          0:00:00.020159424  4381      0x202cc00 INFO            
           GST_STATES
          gstelement.c:2579:_priv_gst_element_state_changed:<avdec_h264-0>
          notifying about state-changed PAUSED to PLAYING (VOID_PENDING
          pending)<br>
          0:00:00.020166928  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2951:gst_bin_change_state_func:<pipeline0>
          child 'avdec_h264-0' changed state to 4(PLAYING) successfully<br>
          0:00:00.020173149  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2503:gst_bin_element_set_state:<h264parse0>
          current PAUSED pending VOID_PENDING, desired next PLAYING<br>
          0:00:00.020178564  4381      0x202cc00 INFO            
           GST_STATES
          gstelement.c:2676:gst_element_continue_state:<h264parse0>
          completed state change to PLAYING<br>
          0:00:00.020183568  4381      0x202cc00 INFO            
           GST_STATES
          gstelement.c:2579:_priv_gst_element_state_changed:<h264parse0>
          notifying about state-changed PAUSED to PLAYING (VOID_PENDING
          pending)<br>
          0:00:00.020190138  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2951:gst_bin_change_state_func:<pipeline0>
          child 'h264parse0' changed state to 4(PLAYING) successfully<br>
          0:00:00.020196292  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2503:gst_bin_element_set_state:<rtph264depay0>
          current PAUSED pending VOID_PENDING, desired next PLAYING<br>
          0:00:00.020201631  4381      0x202cc00 INFO            
           GST_STATES
          gstelement.c:2676:gst_element_continue_state:<rtph264depay0>
          completed state change to PLAYING<br>
          0:00:00.020206440  4381      0x202cc00 INFO            
           GST_STATES
          gstelement.c:2579:_priv_gst_element_state_changed:<rtph264depay0>
          notifying about state-changed PAUSED to PLAYING (VOID_PENDING
          pending)<br>
          0:00:00.020212854  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2951:gst_bin_change_state_func:<pipeline0>
          child 'rtph264depay0' changed state to 4(PLAYING) successfully<br>
          0:00:00.020222030  4381      0x202cc00 INFO            
           GST_STATES
          gstelement.c:2676:gst_element_continue_state:<udpsrc0>
          completed state change to PLAYING<br>
          0:00:00.020228362  4381      0x202cc00 INFO            
           GST_STATES
          gstelement.c:2579:_priv_gst_element_state_changed:<udpsrc0>
          notifying about state-changed PAUSED to PLAYING (VOID_PENDING
          pending)<br>
          0:00:00.020234673  4381      0x202cc00 INFO            
           GST_STATES
          gstbin.c:2951:gst_bin_change_state_func:<pipeline0>
          child 'udpsrc0' changed state to 4(PLAYING) successfully<br>
          New clock: GstSystemClock<br>
          0:01:17.678501741  4381      0x21460a0 INFO              
          GST_EVENT gstevent.c:901:gst_event_new_segment: creating
          segment event time segment start=0:00:00.000000000,
          offset=0:00:00.000000000, stop=99:99:99.999999999,
          rate=1.000000, applied_rate=1.000000, flags=0x00,
          time=0:00:00.000000000, base=0:00:00.000000000, position
          0:00:00.000000000, duration 99:99:99.999999999<br>
          0:01:17.678521905  4381      0x21460a0 INFO                
          basesrc gstbasesrc.c:2962:gst_base_src_loop:<udpsrc0>
          marking pending DISCONT<br>
          0:01:17.678543028  4381      0x21460a0 INFO              
          GST_EVENT gstevent.c:901:gst_event_new_segment: creating
          segment event time segment start=0:00:00.000000000,
          offset=0:00:00.000000000, stop=99:99:99.999999999,
          rate=1.000000, applied_rate=1.000000, flags=0x00,
          time=0:00:00.000000000, base=0:00:00.000000000, position
          0:01:17.658403007, duration 99:99:99.999999999<br>
        </div>
        <div>
          <div>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</div>
          The receiver stop here.</div>
        <div><br>
        </div>
        <div>My question:</div>
        <div>    How to let me know the receiver receive the packets,
          and why can't i play it?</div>
        <div><br>
        </div>
        <div>//dengke</div>
        <div><br>
        </div>
        <div><br>
        </div>
      </div>
      <br>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
gstreamer-devel mailing list
<a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a>
<a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a></pre>
    </blockquote>
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