[Paraview] [EXTERNAL] png image file size - screenshot vs animation

[Scott, W Alan]

Hi Alex,
I just tried this with master (in essence, 5.5.0-rc4 (out Real Soon Now) ).  My sizes are exactly the same.  I did the following:

  *   Linux, master, remote server.
  *   Opened can.exo.  (It's in Examples.)  All variables on, apply.
  *   Rotated can so it looks nice.
  *   File/ Save Screenshot with your resolution.  Saved as .png.  Rest are default settings.  File size is 197k.
  *   File/ Save Animation with your resolution.  Saved as .png.  Rest are default settings.  File size is 197k.


Mind trying using the 5.5.0-rc3, from the paraview.org website?  Also, if you are still seeing weirdnesses, try the new, shiny "Reset to Default Settings" option (and keep a copy of your state files for Kitware, if this is an issue).

If you still see issues, mind giving us a list, as above, how to recreate?

Thanks,

Alan

From: ParaView [mailto:paraview-bounces at public.kitware.com] On Behalf Of Stief, Alexander
Sent: Wednesday, March 28, 2018 5:21 AM
To: paraview at public.kitware.com
Subject: [EXTERNAL] [Paraview] png image file size - screenshot vs animation

Hi,

PV version is 5.4.1
when making a png screenshot in PV with a resolution of 3840x2160, the file size I get with default settings is ~1.4MB. This is due to the fact that around 80% of the image are plain white space. So far, so normal.
However, when I create an animation and export to png images with the exact same default settings for image quality, the image file size for the exact same scene is ~28MB.
Only when I dial down the image quality manually to around 60 the file size becomes similar to the png file from the screenshot. And the image quality is not visibly worse than with 100% setting.
This must be some kind of bug, I never had this issue with previous versions.

tl;dr: png image file size differs greatly between screenshot and animation with the exact same default settings.

Regards
Alex
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://public.kitware.com/pipermail/paraview/attachments/20180328/332b0353/attachment.html>