GES 1.14 -- How to achieve crossfade

[Thibault Saunier]

On Wed, Feb 20, 2019, 18:44 David Ing <ding at panopto.com> 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 <
> saunierthibault at gmail.com> 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 <ding at panopto.com> 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?
>>> _______________________________________________
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>>> gstreamer-devel at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
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>
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