[okular] [Bug 474256] New: KF5JS to Qt5Qml Transition: JavaScript-driven animations in PDFs no longer working

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https://bugs.kde.org/show_bug.cgi?id=474256

            Bug ID: 474256
           Summary: KF5JS to Qt5Qml Transition: JavaScript-driven
                    animations in PDFs no longer working
    Classification: Applications
           Product: okular
           Version: 23.08.0
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: a.grahn at web.de
  Target Milestone: ---

Created attachment 161493
  --> https://bugs.kde.org/attachment.cgi?id=161493&action=edit
Example PDF with embedded JS-driven animation.

SUMMARY

JavaScript-driven PDF animations stopped working in Okular-23.08.0

STEPS TO REPRODUCE
1. Open attached animationExample.pdf in Okular-23.08.0
2. Click on the Play button below the animation

OBSERVED RESULT

The animation does not start playing.

EXPECTED RESULT

PDF animations used to work in previous Okular versions (tested in v. 23.04.3).

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 5.108.0
Qt Version:  5.15.10

ADDITIONAL INFORMATION:

The LaTeX source of animationExample.pdf. Run command pdflatex twice to rebuild
the PDF.

\documentclass[border=3pt]{standalone}

\usepackage{animate}
\usepackage{graphicx}

\begin{document}
\animategraphics[controls,width=2in]{1}{example-movie}{}{}
\end{document}

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