<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> </head><body style=""><div>hmm, but whats entirely not normal IMO is the fact that the seek fails without ever reaching my element logic. If I dont have the flag set, my element is not used at all. If I have it set, the BaseParse implementation says it cannot handle negative playback rates... bummer.</div> <div> </div> <div> > Tim Müller <tim@centricular.com> hat am 21. Mai 2015 um 14:13 geschrieben: > > > On Thu, 2015-05-21 at 13:24 +0200, Christian Sell wrote: > > Hi, > > > I have an element derived from GstBaseParse. Now, whenever I perform a > > seek operation on the pipeline, the seek fails, and I see a log > > messate stating "child <element> is not a sink". Digging into the code > > that emits the log message, I see that a flag GST_ELEMENT_FLAG_SINK is > > queried, which is not set on the element, although it clearly has a > > sink pad. > > > > My question: who is responsible for setting it? Is this described > > somewhere? > > Only sink elements,i.e elements that *only* have a sink pad, should have > that flag set. In any case it's just an optimisation so if it's not set > that should not affect behaviour. GstBin looks at that. > > The log messages are normal. When a seek is sent to the top-level > pipeline it travels down the pipeline bin/element hierarchy via the > GstElement::send_event vfunc. Depending on whether the event is an > upstream event or a downstream event the GstBin/pipeline will seek to go > down the pipeline hierarchy until it finds a sink or source element, > which will then inject the element into the data flow and push it > upstream/downstream. So it's entirely normal. > > Cheers > -Tim > > -- > Tim Müller, Centricular Ltd - http://www.centricular.com > > _______________________________________________ > gstreamer-devel mailing list > gstreamer-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</div></body></html>