Legacy ImageMagick Discussions Archive

I have an animation file named test.gif.

I know that I can set the delay for all frames to 30/100 second using:
convert test.gif -set delay 30 output.gif

The question I have is: how do you set a delay for a particular frame ?

I want to delay 1 second after the first frame displayed and delay 3 seconds after the last frame displayed
and for the rest of the frames to delay 30/100 of a second, how do you do it?

Thanks!

An example where the first and last images are set to 100 and the rest to 10 is given in my examples page for my pagepeel script at http://www.fmwconcepts.com/imagemagick/ ... /index.php

Thanks Fred for the reply!

pagepeel seems to be adding the delay as it reads-in the images to build the animated GIF.

I was looking for a method that could apply in a generic way to any animated GIF file, where
I want to change the delay after the first frame and delay after the last frame.
(without even knowing the total number of frames in the GIF file, it could have 4 frames or 400 frames.)

Since we already have options to set a delay ( -delay and -set delay ), I was thinking perhaps there's an easier way to change the delays.

Do I have to extract all the frames from the animated GIF file and then add them back frame-by-frame and set the delay that way?

If you already have an animation and just want to change to delay of one frame, then lets say you want to change the second frame i.e. frame [1], then you can do that with -set delay. You have to clone the given frame and then swap the new one for the old one and then delete the old one.


convert anim.gif \( -clone 1 -set delay 50 \) -swap 1,-1 +delete anim.gif

This clones frame [1], changes the delay, then swaps frame [1] with the last frame [-] and then deletes the original frame which is now the last one (using +delete).

see
http://www.imagemagick.org/Usage/basics/#parenthesis

There may be other ways, but I am not an animation expert. You can read about animations at
http://www.imagemagick.org/Usage/anim_basics/
http://www.imagemagick.org/Usage/anim_opt/
http://www.imagemagick.org/Usage/anim_mods/

This is also covered byFrame-by-Frame Modifications
http://www.imagemagick.org/Usage/anim_mods/#frame_mod

However an alturnative to set the delay of all the frames, with different values for the first and last, is given in
Color Morphing Animations
http://www.imagemagick.org/Usage/anim_mods/#morph

After some experiments, this seems to work. BTW, I am using Win 7.

convert test.gif ( -clone 0 -set delay 100 ) -swap 0 +delete \
( +clone -set delay 300 ) +swap +delete test2.gif

Thank you Fred and Anthony for the help!