<div dir="ltr"><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>