From: Lars Ingebrigtsen <larsi@gnus.org>
To: Evgeny Zajcev <lg.zevlg@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: excessively slow image animation
Date: Wed, 13 Feb 2019 18:03:51 +0100 [thread overview]
Message-ID: <m35ztnhb7s.fsf@gnus.org> (raw)
In-Reply-To: <CAO=W_ZrUUDM3aaNgf9X84Z0vapDWd8gT=dS02sdWqx7anXP_tw@mail.gmail.com> (Evgeny Zajcev's message of "Wed, 13 Feb 2019 17:39:38 +0300")
Evgeny Zajcev <lg.zevlg@gmail.com> writes:
> I've got multi frame image at http://lgarc.narod.ru/giphy.mp4
>
> And run next code on it:
>
> (let ((ctime (float-time)))
> (setq img (create-image "~/tmp/giphy.mp4" 'imagemagick nil :scale 1.0))
> (insert-image img)
> (cl-dotimes (index 65)
> (image-show-frame img index 'nocheck)
> (sit-for 0.0))
> (- (float-time) ctime))
> ==> 18.788017988204956
>
> 18 seconds to show every frame
Wow, that's slow...
[...]
> Now I use method with bmp files. I would like to use built in `:index' image
> property to animate images, however current animation speed is totally not
> acceptable. Can this be fixed, or am I doing something wrong?
If I remember correctly, I was the one that added the :index support for
imagemagick images in Emacs. It's quite likely that I was using
non-optimal ways to do the animation and that imagemagick has better and
faster ways of doing the computation.
Have a look at imagemagick_compute_animated_image in image.c and rewrite
to be faster. :-)
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2019-02-13 17:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-13 14:39 excessively slow image animation Evgeny Zajcev
2019-02-13 17:03 ` Lars Ingebrigtsen [this message]
2019-02-13 23:14 ` Alan Third
2019-02-13 23:29 ` Evgeny Zajcev
2019-02-14 18:21 ` Alan Third
2019-02-14 18:41 ` Evgeny Zajcev
2019-02-14 0:30 ` Evgeny Zajcev
2019-02-14 4:30 ` Stefan Monnier
2019-02-26 21:18 ` Daniel Pittman
2019-02-26 21:50 ` Evgeny Zajcev
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