<html><head></head><body><div style="color:#000; background-color:#fff; font-family:lucida console, sans-serif;font-size:13px">This pipeline will pause for ~3s every 10s when streaming from a wifi cam (tested with 2 different cam brands).<br id="yui_3_16_0_ym19_1_1478209769353_9541"><br id="yui_3_16_0_ym19_1_1478209769353_9542">rtspsrc location=rtsp://192.x.x.x/AmbaStreamTest latency=30 ! decodebin ! timeoverlay ! autovideosink<br id="yui_3_16_0_ym19_1_1478209769353_9543"><div id="yui_3_16_0_ym19_1_1478209769353_9883"><br></div><div id="yui_3_16_0_ym19_1_1478209769353_9882">This issue is *not* reproducible with gst-launch or the mobile applications dedicated to the particular cams.</div><div id="yui_3_16_0_ym19_1_1478209769353_9881"><br></div><div id="yui_3_16_0_ym19_1_1478209769353_9852">I am using an msys2 build of gstreamer 1.10.0 and the pipeline is run within a Qt 5.6.1 app.</div><div dir="ltr" id="yui_3_16_0_ym19_1_1478209769353_9853">I tried decodebin3 and fakesink : same pauses...</div><div dir="ltr" id="yui_3_16_0_ym19_1_1478209769353_10062">One of the cam streams h265, the other one jpeg.<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1478209769353_9854"><br id="yui_3_16_0_ym19_1_1478209769353_9855"></div><div id="yui_3_16_0_ym19_1_1478209769353_9845" dir="ltr">In the Qt application, I tried to mimic what is done in gst-launch to the notable exceptions that:</div>1/ I use the video overlay API<br id="yui_3_16_0_ym19_1_1478209769353_9549">2/ All bus events are handled synchronously (!)<br id="yui_3_16_0_ym19_1_1478209769353_9550">This includes latency events, overlay events, etc...<br id="yui_3_16_0_ym19_1_1478209769353_9551"><br id="yui_3_16_0_ym19_1_1478209769353_9552">Log level 3 yields this repeating pattern of rendering, then a freeze until skew warnings followed by decreasing timestamp warnings:<br id="yui_3_16_0_ym19_1_1478209769353_9553">Note that the pause/freeze happens exactly every 10 seconds.<br id="yui_3_16_0_ym19_1_1478209769353_9554"><br id="yui_3_16_0_ym19_1_1478209769353_9555">0:00:06.696025748 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.506932347<br id="yui_3_16_0_ym19_1_1478209769353_9556">0:00:06.729396586 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.540299043<br id="yui_3_16_0_ym19_1_1478209769353_9557">0:00:06.762759977 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.573665740<br id="yui_3_16_0_ym19_1_1478209769353_9558">0:00:06.796128643 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.607032436<br id="yui_3_16_0_ym19_1_1478209769353_9559">0:00:06.829490482 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.640399131<br id="yui_3_16_0_ym19_1_1478209769353_9560">0:00:06.863000955 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.673765827<br id="yui_3_16_0_ym19_1_1478209769353_9561">0:00:06.896212610 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.707132523<br id="yui_3_16_0_ym19_1_1478209769353_9562">0:00:06.929581586 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.740499218<br id="yui_3_16_0_ym19_1_1478209769353_9563">0:00:06.963065994 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:06.773865913<br id="yui_3_16_0_ym19_1_1478209769353_9564">0:00:10.009519675 5096 17982b00 WARN rtpjitterbuffer rtpjitterbuffer.c:570:calculate_skew: delta - skew: 0:00:03.076607262 too big, reset skew<br id="yui_3_16_0_ym19_1_1478209769353_9565">0:00:10.068884294 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.256601394 < 0:00:10.323816277)<br id="yui_3_16_0_ym19_1_1478209769353_9566">0:00:10.128340451 5096 17982b00 WARN rtpjitterbuffer rtpjitterbuffer.c:570:calculate_skew: delta - skew: 0:00:01.922682282 too big, reset skew<br id="yui_3_16_0_ym19_1_1478209769353_9567">0:00:10.258822277 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.233469552 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9568">0:00:10.275259457 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.265360892 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9569">0:00:10.306632898 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.296691913 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9570">0:00:10.340349720 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.327394202 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9571">0:00:10.378309886 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.357797606 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9572">0:00:10.415688241 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.387509904 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9573">0:00:10.441272737 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.416511180 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9574">0:00:10.471885323 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.445257516 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9575">0:00:10.520637703 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.473325486 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9576">0:00:10.539163818 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.500763046 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9577">0:00:10.577593467 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.528117597 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9578">0:00:10.605983069 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.554982983 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9579">0:00:10.642451626 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.581471561 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9580">0:00:10.677846857 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.608154940 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9581">0:00:10.715108540 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.634675952 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9582">0:00:10.738431263 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.661180636 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9583">0:00:10.786688404 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.688138936 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9584">0:00:10.807724842 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.715290786 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9585">0:00:10.843468229 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.742765600 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9586">0:00:10.875957506 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.770932558 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9587">0:00:10.906384224 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.799541281 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9588">0:00:10.948233062 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.828660596 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9589">0:00:10.977393758 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.858487781 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9590">0:00:11.015278211 5096 17982a70 WARN videodecoder gstvideodecoder.c:2767:gst_video_decoder_prepare_finish_frame:<avdec_h264-0> decreasing timestamp (0:00:10.888815991 < 0:00:10.891049599)<br id="yui_3_16_0_ym19_1_1478209769353_9591">0:00:13.069642666 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:12.880490649<br id="yui_3_16_0_ym19_1_1478209769353_9592">0:00:13.103571422 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:12.913857316<br id="yui_3_16_0_ym19_1_1478209769353_9593">0:00:13.136318869 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:12.947223982<br id="yui_3_16_0_ym19_1_1478209769353_9594">0:00:13.169681329 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:12.980590649<br id="yui_3_16_0_ym19_1_1478209769353_9595">0:00:13.203539647 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:13.013957316<br id="yui_3_16_0_ym19_1_1478209769353_9596">0:00:13.236428280 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:13.047323982<br id="yui_3_16_0_ym19_1_1478209769353_9597">0:00:13.269793843 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:13.080690649<br id="yui_3_16_0_ym19_1_1478209769353_9598">0:00:13.303543867 5096 17982a70 INFO d3dvideosink d3dhelpers.c:1905:d3d_render_buffer:<autovideosink0-actual-sink-d3dvideo> Render 0:00:13.114057316<div><br></div></div></body></html>