GES 1.12, Two bugs (possibly related) with (1) GESEffect volume and (2) layer ordering priority

[David Ing]

Thanks ... Good to know

On Thu, Jul 19, 2018, 6:21 PM Thibault Saunier <tsaunier at gnome.org> wrote:

> This is correct yes. I just figured that your problem is that you add
> an *audio* effect on a *video only* clip.... I tested and that fails
> in the way you describe (we should probably be smarter here, but it is
> a programming error on your side.
>
> On Thu, Jul 19, 2018 at 7:03 PM David Ing <ding at panopto.com> wrote:
> >
> > My timeline consists of 3 layers, where each layer has a GESUriClip.
> >
> > For each of the 3 clips, ...
> >
> > I created a GESEffect using either
> >
> > GESEffect* gesEffect = ges_effect_new("volume volume=1.0")
> >
> > GESEffect* gesEffect = ges_effect_new("volume mute=true")
> >
> > Then I added the effect to the clip
> >
> > ges_container_add(reinterpret_cast<GESContainer*>(gesUriClip),
> reinterpret_cast<GESTimelineElement*>(gesEffect))
> >
> > Is this generally the correct way to add effects to clips?  (Sometimes I
> feel like I'm groping around a dark hallway.)
> >
> > On Thu, Jul 19, 2018 at 3:53 PM, Thibault Saunier <tsaunier at gnome.org>
> wrote:
> >>
> >> > Thibault, your suggestion for #1 worked like a charm.  It fixed both
> of the problems.
> >> >
> >> > I have two followup questions.
> >> >
> >> > This experience has me a little worried.  If GESEffect does not work
> well for the `volume` plugin, can I expect problems with most of the other
> plugins?
> >>
> >> Well, we use it very extensively in Pitivi without (known) problem,
> >> how did you use them exactly?
> >>
> >> > For future reference, I don't know how to save a *.xges file.  Would
> I use `ges_timeline_save_to_uri` for that?
> >>
> >> Yes.
> >>
> >> > On Thu, Jul 19, 2018 at 2:35 PM, Thibault Saunier <
> saunierthibault at gmail.com> wrote:
> >> >>
> >> >> Hello,
> >> >>
> >> >> 1. Setting mute=true means that the source will send silent, which is
> >> >> not what you want. Also you do not need an effect to handle the
> volume
> >> >> as there is already a volume element inside sources you can use the
> >> >> ges_timeline_element_set_child_property(element, "volume"....)[0]
> >> >> method to set it. You can see what properties audio sources expose
> >> >> here:
> https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-editing-services/html/GESAudioSource.html
> >> >>
> >> >> 2. Layer with lower priorities are on top of the stack of layers,
> >> >> meaning that layer with prio=0 is "the first". Now I am not sure why
> >> >> you get that error but it seems to be a NLEObject priority issue.
> >> >> Providing a .xges file would help (just save your timeline and paste
> >> >> it here if removing the effect doesn't work).
> >> >>
> >> >> Regards,
> >> >>
> >> >> Thibault Saunier
> >> >>
> >> >> [0]
> https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-editing-services/html/GESTimelineElement.html#ges-timeline-element-set-child-property
> >> >> _______________________________________________
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> >> >
> >> >
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