<div dir="ltr">Amazing ... I had no idea that Gstreamer could interpolate parameters like that.<div> </div><div>I don't want to burden you with a code review ... it wouldn't be practical anyway. Your python example is very clear ... I can just extrapolate from that.</div><div> </div><div>Thank you!</div></div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Feb 21, 2019 at 11:12 AM Thibault Saunier <<a href="mailto:tsaunier@gnome.org">tsaunier@gnome.org</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I knew it :-) Just pushed a simple example in python: <a href="https://gitlab.freedesktop.org/gstreamer/gst-editing-services/blob/master/examples/python/keyframes.py" rel="noreferrer" target="_blank">https://gitlab.freedesktop.org/gstreamer/gst-editing-services/blob/master/examples/python/keyframes.py</a> You should be able to extrapolate for any language you use (also I would be happy to review the port of that example to that language ;)) Thibault. On Thu, Feb 21, 2019 at 1:56 PM David Ing <<a href="mailto:ding@panopto.com" target="_blank">ding@panopto.com</a>> wrote: > > I don't know how to do that. > > On Wed, Feb 20, 2019 at 3:59 PM Thibault Saunier <<a href="mailto:saunierthibault@gmail.com" target="_blank">saunierthibault@gmail.com</a>> wrote: >> >> Then you should keyframe the alpha child property of the source :) >> >> On Wed, Feb 20, 2019, 20:26 David Ing <<a href="mailto:ding@panopto.com" target="_blank">ding@panopto.com</a>> wrote: >>> >>> What if I did not want a transition between two clips "a" and "b", but instead I want clip "a" to transition into whatever the lower-priority layers had drawn? >>> >>> On Wed, Feb 20, 2019 at 2:12 PM David Ing <<a href="mailto:ding@panopto.com" target="_blank">ding@panopto.com</a>> wrote: >>>> >>>> Thank you! >>>> >>>> On Wed, Feb 20, 2019 at 2:00 PM Thibault Saunier <<a href="mailto:saunierthibault@gmail.com" target="_blank">saunierthibault@gmail.com</a>> wrote: >>>>> >>>>> >>>>> >>>>> On Wed, Feb 20, 2019, 18:44 David Ing <<a href="mailto:ding@panopto.com" target="_blank">ding@panopto.com</a>> wrote: >>>>>> >>>>>> Thibault, you said "Transitions happen between 2 overlapping clips". Do you mean two clips within the same layer? >>>>>> >>>>>> >>>>>> Are you saying that this will achieve a 2-second crossfade from a --> b? >>>>>> >>>>>> Layer 1: >>>>>> >>>>>> GESSourceClip a >>>>>> >>>>>> starts at 0 seconds >>>>>> ends at 11 seconds >>>>>> >>>>>> GESTransitionClip c >>>>>> >>>>>> starts at 9 seconds >>>>>> >>>>>> ends at 11 seconds >>>>>> >>>>>> GESSourceClip b >>>>>> >>>>>> starts at 9 seconds >>>>>> ends at 20 seconds >>>>> >>>>> >>>>> That is correct yes :) >>>>>> >>>>>> >>>>>> On Wed, Feb 20, 2019 at 1:37 PM Thibault Saunier <<a href="mailto:saunierthibault@gmail.com" target="_blank">saunierthibault@gmail.com</a>> wrote: >>>>>>> >>>>>>> Hello David, >>>>>>> >>>>>>> Transitions happen between 2 overlapping clips so you need to make sure clips overlap at the point where you add them. >>>>>>> >>>>>>> Alternatively, you can use the GESTimeline::auto-transition property to automatically create transitions when 2 clips overlap. >>>>>>> >>>>>>> Regards, >>>>>>> >>>>>>> Thibault >>>>>>> >>>>>>> On Wed, Feb 20, 2019, 17:47 David Ing <<a href="mailto:ding@panopto.com" target="_blank">ding@panopto.com</a>> wrote: >>>>>>>> >>>>>>>> I am struggling to find a clean example for how to achieve a crossfade. >>>>>>>> >>>>>>>> I have a layer which contains two clips of type GESSourceClip: >>>>>>>> >>>>>>>> GESSourceClip a >>>>>>>> >>>>>>>> starts at 0 seconds >>>>>>>> ends at 9.999999999 seconds >>>>>>>> >>>>>>>> GESSourceClip b >>>>>>>> >>>>>>>> starts at 10 seconds >>>>>>>> ends at 20 seconds >>>>>>>> >>>>>>>> >>>>>>>> Now I want a 2 second crossfade from "a" to "b" ... but how? >>>>>>>> >>>>>>>> Do I create a GESTransitionClip and insert it into the layer between "a" and "b"? >>>>>>>> >>>>>>>> What about the timings. Do I keep the timings for "a" and "b" unchanged, but set the transition clip as follows? >>>>>>>> >>>>>>>> starts at 9 seconds >>>>>>>> ends at 11 seconds >>>>>>>> >>>>>>>> Is it okay for the GESTransitionClip to overlap with GESSourceClip with respect to time? >>>>>>>> _______________________________________________ >>>>>>>> gstreamer-devel mailing list >>>>>>>> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> >>>>>>>> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> gstreamer-devel mailing list >>>>>>> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> >>>>>>> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> >>>>>> >>>>>> _______________________________________________ >>>>>> gstreamer-devel mailing list >>>>>> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> >>>>>> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> >>>>> >>>>> _______________________________________________ >>>>> gstreamer-devel mailing list >>>>> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> >>>>> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> >>> >>> _______________________________________________ >>> gstreamer-devel mailing list >>> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> >>> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> >> >> _______________________________________________ >> gstreamer-devel mailing list >> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> >> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > > _______________________________________________ > gstreamer-devel mailing list > <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> > <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <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>