Question re: display -update <seconds> [file]

[neelfirst]

Hello,

I am attempting to use display to reload [file] that is being modified by another process. I would like display to reload the image every 0.1-1 seconds. However display simply exits upon the first modification to [file] when I set <seconds> to 1.0, and does not update at all when <seconds> is set to 0.1. (It does however load properly and show [file] the first time.)

This has been documented in one spot on the web: http://superuser.com/questions/174522/c ... r-in-linux

ImageMagick's display not only does not automatically refresh when the file changes on disk - and even when you press 'refresh' in display, you still do not get the latest version of the file (meaning, you have to restart display to show the latest version ).

But the source is over 4 years old. Has this been corrected in the meantime? Is my use model incorrect? Should I pursue another method of reloading and displaying an image?

[snibgo]

It might help if you said what version IM you use, on what platform.

[neelfirst]

Right, duh, sorry.

ImageMagick version: 6.9.1-6
OS version: Ubuntu 14.04
Architecture: amd64
Kernel version: Linux 3.13.0-39

[magick]

We can reproduce the problem you posted and have a patch in ImageMagick 6.9.1-7 Beta available by sometime tomorrow. Thanks.

[s3nzyn]

...bump?

I have the same problem. Running:

Code: Select all

display -density 120 -update 0.1 mypicture.svg

or

Code: Select all

display -density 120 -update 0.01 mypicture.svg

did not work, while

Code: Select all

display -density 120 -update 1 mypicture.svg

did work:)

Since the svg file is written on change events, I was hoping we could have an update of 0 (e.g. refresh upon change) or at least 0.1. I might be using the wrong version, though. Here's my info:

Code: Select all

Version: ImageMagick 6.9.3-0 Q16 x86_64 2017-03-11 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2016 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP 
Delegates (built-in): bzlib cairo djvu fftw fontconfig freetype gslib jbig jng jp2 jpeg lcms ltdl lzma openexr pangocairo png ps rsvg tiff webp wmf x xml zlib

Code: Select all

$ uname -a
Linux think 4.11.3-200.fc25.x86_64 #1 SMP Thu May 25 19:03:07 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

Should I use animate for this instead?

Also, let me congratulate your achievement. So far, you have the only image viewer that doesn't redraw (creating a flicker).

EDIT: I'm on fedora, so it could be Wayland? I'll check. Nope, same same.