GES 1.14 -- How to achieve crossfade

[David Ing]

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 <ding at panopto.com> wrote:

> Thank you!
>
> On Wed, Feb 20, 2019 at 2:00 PM Thibault Saunier <
> saunierthibault at gmail.com> wrote:
>
>>
>>
>> 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?
>>>>> _______________________________________________
>>>>> gstreamer-devel mailing list
>>>>> gstreamer-devel at lists.freedesktop.org
>>>>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>
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>>>
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>
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