ges-launch transition

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ges-launch transition

vincent achard-2
Hello gstreamer lovers!

I'd love to get video transitions working from the ges-launch command line.

Tried with several video formats (ogg/theora - mp4/x-raw): no luck (Ijust get a regular cut: direct switching from one clip to the other).

even with test-clips it doesn't work for me (no transition effect observed):

ges-launch-1.0 +test-clip red duration=5 +transition crossfade duration=2 +test-clip blue duration=5

is my syntax wrong? am I missing something?

I use a self compiled 1.16.0 gstreamer version, and of course I can provide any debug / log

Thank you for reading this!

cheers!

Vince
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Re: ges-launch transition

Thibault Saunier-4
Hello,

Transitions are automatically added when clips overlap, you can just do:

    ges-launch-1.0 +test-clip red duration=5 +test-clip blue start=2 duration=5

and there will be a transition from the second second to the fifth.

BR,

Thibault


On Fri, Jan 10, 2020 at 2:58 PM vincent achard <[hidden email]> wrote:
Hello gstreamer lovers!

I'd love to get video transitions working from the ges-launch command line.

Tried with several video formats (ogg/theora - mp4/x-raw): no luck (Ijust get a regular cut: direct switching from one clip to the other).

even with test-clips it doesn't work for me (no transition effect observed):

ges-launch-1.0 +test-clip red duration=5 +transition crossfade duration=2 +test-clip blue duration=5

is my syntax wrong? am I missing something?

I use a self compiled 1.16.0 gstreamer version, and of course I can provide any debug / log

Thank you for reading this!

cheers!

Vince
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Re: ges-launch transition

vincent achard-2
On Fri, 10 Jan 2020 17:15:24 -0300
Thibault Saunier <[hidden email]> wrote:

> Hello,
>
> Transitions are automatically added when clips overlap, you can just
> do:
>
>     ges-launch-1.0 +test-clip red duration=5 +test-clip blue start=2
> duration=5
>
> and there will be a transition from the second second to the fifth.
>
> BR,
>
> Thibault
>
>
> On Fri, Jan 10, 2020 at 2:58 PM vincent achard <[hidden email]>
> wrote:
>
> > Hello gstreamer lovers!
> >
> > I'd love to get video transitions working from the ges-launch
> > command line.
> >
> > Tried with several video formats (ogg/theora - mp4/x-raw): no luck
> > (Ijust get a regular cut: direct switching from one clip to the
> > other).
> >
> > even with test-clips it doesn't work for me (no transition effect
> > observed):
> >
> > ges-launch-1.0 +test-clip red duration=5 +transition crossfade
> > duration=2 +test-clip blue duration=5
> >
> > is my syntax wrong? am I missing something?
> >
> > I use a self compiled 1.16.0 gstreamer version, and of course I can
> > provide any debug / log
> >
> > Thank you for reading this!
> >
> > cheers!
> >
> > Vince
> > _______________________________________________
> > gstreamer-devel mailing list
> > [hidden email]
> > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> >  

Great! Thanks!
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Re: ges-launch transition

Mathieu Duponchelle
In reply to this post by vincent achard-2
On 1/10/20 6:31 PM, vincent achard wrote:
> ges-launch-1.0 +test-clip red duration=5 +transition crossfade duration=2 +test-clip blue duration=5

Try settting a start:

ges-launch-1.0 +test-clip red duration=5 +test-clip blue duration=5 start=3

A crossfade transition will be added automatically as clips now overlap.

--
Mathieu Duponchelle · https://www.centricular.com
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