Bug 419041 - Animated PNG are flickering
Summary: Animated PNG are flickering
Status: RESOLVED WORKSFORME
Alias: None
Product: Falkon
Classification: Applications
Component: general (other bugs)
Version First Reported In: 3.1.0
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: David Rosca
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-03-20 08:48 UTC by Feufochmar
Modified: 2020-11-24 04:34 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


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Description Feufochmar 2020-03-20 08:48:04 UTC
SUMMARY
Animated PNG are flickering.
Those images may be used as animated icons on some services as an alternative to GIF images, and they are incorrectly displayed.

STEPS TO REPRODUCE
1. Load a page containing APNG images. For instance this page: https://en.wikipedia.org/wiki/Animated_Portable_Network_Graphics

OBSERVED RESULT
Images are flickering, only the first frame is shown correctly, the other frames are not shown.

EXPECTED RESULT
Either:
 - only the first frame is shown (non-animated solution)
 - all frames are correctly displayed (animated solution)

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: ArchLinux 64 bits
KDE Plasma Version: 5.18.3
KDE Frameworks Version: 5.60.0
Qt Version: 5.14.1
libpng: 1.6.37
Comment 1 Justin Zobel 2020-10-25 06:48:25 UTC
I've just tested on https://en.wikipedia.org/wiki/Animated_Portable_Network_Graphics as mentioned and both images on the right load and are animated correctly with no flickering.

Falkon: 3.1.0
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.74.0
Qt Version: 5.14.2

Can you please re-test with all packages upgraded and let us know if this issue is still occurring.
Comment 2 Bug Janitor Service 2020-11-09 04:33:56 UTC
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 3 Bug Janitor Service 2020-11-24 04:34:19 UTC
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!