<div dir="ltr">I'm trying the following code, seems not work yet:<div><br></div><div> gboolean ret = FALSE;<br> GstEvent *flush_start, *flush_stop;<br><br> DEBUG("flushing pipeline...");<br> flush_start = gst_event_new_flush_start();<br> flush_stop = gst_event_new_flush_stop(FALSE);<br><br> ret = gst_element_send_event(GST_ELEMENT(mGstPipeline), flush_start);<br> if (!ret)<br> WARNING("failed to send flush-start event");<br> ret = gst_element_send_event(GST_ELEMENT(mGstPipeline), flush_stop);<br> if (!ret)<br> WARNING("failed to send flush-stop event");<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Halley Zhao <<a href="mailto:aihua.halley.zhao@gmail.com">aihua.halley.zhao@gmail.com</a>> 于2019年6月3日周一下午5:48写道：<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">for my pipeline, appsrc-->video_decode-->video_sink;<div>seems appsrc doesn't support seek, so the flush is ignored as well. is there any way to flush appsrc?</div><div>0:00:12.615868250 18152 0xffff94003c00 DEBUG basesrc gstbasesrc.c:2071:gst_base_src_default_event:<my_appsrc> is not seekable<br>0:00:12.615988375 18152 0xffff94003c00 DEBUG basesrc gstbasesrc.c:2099:gst_base_src_event:<my_appsrc> subclass refused event<br></div><div><br></div><div><br></div><div>0:00:12.614262000 18152 0xffff94003c00 INFO GST_EVENT gstevent.c:1274:gst_event_new_seek: creating seek rate 1.000000, format TIME, flags 1, start_type 1, start 0:00:01.000000000, stop_type 1, stop 99:99:99.999999999<br>0:00:12.614379625 18152 0xffff94003c00 DEBUG GST_EVENT gstevent.c:306:gst_event_new_custom: creating new event 0xffff94165020 seek 51201<br>0:00:12.614425250 18152 0xffff94003c00 DEBUG GST_ELEMENT_PADS gstelement.c:1856:gst_element_send_event: send seek event on element pipeline<br>0:00:12.614498750 18152 0xffff94003c00 DEBUG bin gstbin.c:3137:gst_bin_send_event:<pipeline> Sending seek event to sink children<br>0:00:12.614555500 18152 0xffff94003c00 DEBUG GST_STATES gstbin.c:1969:bin_element_is_sink:<pipeline> child my_vconvert is not sink<br>0:00:12.614608250 18152 0xffff94003c00 DEBUG GST_STATES gstbin.c:1969:bin_element_is_sink:<pipeline> child my_vsink is sink<br>0:00:12.614689250 18152 0xffff94003c00 DEBUG GST_ELEMENT_PADS gstelement.c:1856:gst_element_send_event: send seek event on element my_vsink<br>0:00:12.614744250 18152 0xffff94003c00 DEBUG basesink gstbasesink.c:4470:gst_base_sink_send_event:<my_vsink> handling event 0xffff94165020 seek event: 0xffff94165020, time 99:99:99.999999999, seq-num 152, GstEventSeek, rate=(double)1, format=(GstFormat)GST_FORMAT_TIME, flags=(GstSeekFlags)GST_SEEK_FLAG_FLUSH, cur-type=(GstSeekType)GST_SEEK_TYPE_SET, cur=(gint64)1000000000, stop-type=(GstSeekType)GST_SEEK_TYPE_SET, stop=(gint64)-1;<br>0:00:12.614905375 18152 0xffff94003c00 DEBUG basesink gstbasesink.c:4509:gst_base_sink_send_event:<my_vsink> sending event 0xffff94165020 seek event: 0xffff94165020, time 99:99:99.999999999, seq-num 152, GstEventSeek, rate=(double)1, format=(GstFormat)GST_FORMAT_TIME, flags=(GstSeekFlags)GST_SEEK_FLAG_FLUSH, cur-type=(GstSeekType)GST_SEEK_TYPE_SET, cur=(gint64)1000000000, stop-type=(GstSeekType)GST_SEEK_TYPE_SET, stop=(gint64)-1;<br>0:00:12.615035500 18152 0xffff94003c00 DEBUG GST_EVENT gstpad.c:5638:gst_pad_send_event_unchecked:<my_vconvert:src> have event type seek event: 0xffff94165020, time 99:99:99.999999999, seq-num 152, GstEventSeek, rate=(double)1, format=(GstFormat)GST_FORMAT_TIME, flags=(GstSeekFlags)GST_SEEK_FLAG_FLUSH, cur-type=(GstSeekType)GST_SEEK_TYPE_SET, cur=(gint64)1000000000, stop-type=(GstSeekType)GST_SEEK_TYPE_SET, stop=(gint64)-1;<br>0:00:12.615161500 18152 0xffff94003c00 DEBUG basetransform gstbasetransform.c:1941:gst_base_transform_src_eventfunc:<my_vconvert> handling event 0xffff94165020 seek event: 0xffff94165020, time 99:99:99.999999999, seq-num 152, GstEventSeek, rate=(double)1, format=(GstFormat)GST_FORMAT_TIME, flags=(GstSeekFlags)GST_SEEK_FLAG_FLUSH, cur-type=(GstSeekType)GST_SEEK_TYPE_SET, cur=(gint64)1000000000, stop-type=(GstSeekType)GST_SEEK_TYPE_SET, stop=(gint64)-1;<br>0:00:12.615283625 18152 0xffff94003c00 DEBUG GST_EVENT gstpad.c:5638:gst_pad_send_event_unchecked:<my_vdec:src> have event type seek event: 0xffff94165020, time 99:99:99.999999999, seq-num 152, GstEventSeek, rate=(double)1, format=(GstFormat)GST_FORMAT_TIME, flags=(GstSeekFlags)GST_SEEK_FLAG_FLUSH, cur-type=(GstSeekType)GST_SEEK_TYPE_SET, cur=(gint64)1000000000, stop-type=(GstSeekType)GST_SEEK_TYPE_SET, stop=(gint64)-1;<br>0:00:12.615402000 18152 0xffff94003c00 DEBUG videodecoder gstvideodecoder.c:1584:gst_video_decoder_src_event:<my_vdec> received event 51201, seek<br>0:00:12.615448375 18152 0xffff94003c00 DEBUG videodecoder gstvideodecoder.c:1485:gst_video_decoder_src_event_default:<my_vdec> received event 51201, seek<br>0:00:12.615502625 18152 0xffff94003c00 DEBUG GST_EVENT gstpad.c:5638:gst_pad_send_event_unchecked:<my_appsrc:src> have event type seek event: 0xffff94165020, time 99:99:99.999999999, seq-num 152, GstEventSeek, rate=(double)1, format=(GstFormat)GST_FORMAT_TIME, flags=(GstSeekFlags)GST_SEEK_FLAG_FLUSH, cur-type=(GstSeekType)GST_SEEK_TYPE_SET, cur=(gint64)1000000000, stop-type=(GstSeekType)GST_SEEK_TYPE_SET, stop=(gint64)-1;<br>0:00:12.615618125 18152 0xffff94003c00 DEBUG basesrc gstbasesrc.c:2027:gst_base_src_default_event:<my_appsrc> handle event seek event: 0xffff94165020, time 99:99:99.999999999, seq-num 152, GstEventSeek, rate=(double)1, format=(GstFormat)GST_FORMAT_TIME, flags=(GstSeekFlags)GST_SEEK_FLAG_FLUSH, cur-type=(GstSeekType)GST_SEEK_TYPE_SET, cur=(gint64)1000000000, stop-type=(GstSeekType)GST_SEEK_TYPE_SET, stop=(gint64)-1;<br>0:00:12.615868250 18152 0xffff94003c00 DEBUG basesrc gstbasesrc.c:2071:gst_base_src_default_event:<my_appsrc> is not seekable<br>0:00:12.615988375 18152 0xffff94003c00 DEBUG basesrc gstbasesrc.c:2099:gst_base_src_event:<my_appsrc> subclass refused event<br>0:00:12.616034625 18152 0xffff94003c00 DEBUG GST_PADS gstpad.c:5712:gst_pad_send_event_unchecked:<my_appsrc:src> sent event, ret error<br>0:00:12.616085625 18152 0xffff94003c00 DEBUG GST_PADS gstpad.c:5712:gst_pad_send_event_unchecked:<my_vdec:src> sent event, ret error<br>0:00:12.616131500 18152 0xffff94003c00 DEBUG GST_PADS gstpad.c:5712:gst_pad_send_event_unchecked:<my_vconvert:src> sent event, ret error<br>0:00:12.616173625 18152 0xffff94003c00 DEBUG basesink gstbasesink.c:4518:gst_base_sink_send_event:<my_vsink> handled event: 0<br>0:00:12.616224875 18152 0xffff94003c00 DEBUG GST_STATES gstbin.c:1969:bin_element_is_sink:<pipeline> child my_vdec is not sink<br>0:00:12.616276500 18152 0xffff94003c00 DEBUG GST_STATES gstbin.c:1969:bin_element_is_sink:<pipeline> child my_appsrc is not sink<br>0:00:12.616330875 18152 0xffff94003c00 DEBUG bin gstbin.c:3177:gst_bin_send_event:<pipeline> Sending seek event to src pads<br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Nicolas Dufresne <<a href="mailto:nicolas@ndufresne.ca" target="_blank">nicolas@ndufresne.ca</a>> 于2019年5月29日周三下午8:55写道：<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le mer. 29 mai 2019 07 h 40, Halley Zhao <<a href="mailto:aihua.halley.zhao@gmail.com" target="_blank">aihua.halley.zhao@gmail.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi expert:<div><br></div><div>##background:</div><div> I use a simple gst pipeline (appsrc->v4l2h264decode->waylandsink) inside a bigger pipeline of my own (not gst framework, handles demux, audio etc).</div><div>## issue</div><div> I meet issue for seek. when I seek backward (sometime before current time), the clock is reset to a previous time and new buffer comes with smaller pts. but the cached buffer in gst pipeline has a bigger pts than new clock time, video rendering will be blocked for long time.</div><div> is there any decent way to overcome this?</div><div> I think the possible solution may flush the cached buffer during seek, but I don't find a quick way to do so.</div></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Flushing seeks should already have this effect. Sounds like some bug somewhere.</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.freedesktop.org" rel="noreferrer" target="_blank">gstreamer-devel@lists.freedesktop.org</a><br> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a></blockquote></div></div></div> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a><br> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a></blockquote></div></div></div> </blockquote></div>