[kdemultimedia] [Bug 459009] New: AV1 video preview does not work in Dolphin

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=459009

            Bug ID: 459009
           Summary: AV1 video preview does not work in Dolphin
           Product: kdemultimedia
           Version: 22.08.1
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: ffmpegthumbs
          Assignee: unassigned-bugs at kde.org
          Reporter: 80p3fy75dc at cloud-mail.top
  Target Milestone: ---

Created attachment 151992
  --> https://bugs.kde.org/attachment.cgi?id=151992&action=edit
AV1 video sample

STEPS TO REPRODUCE
1. Download the attached sample AV1 video (or from source:
https://dl8.webmfiles.org/BigBuckBunny-AV1.webm)
2. Run dolphin from a terminal
3. Select "BigBuckBunny-AV1.webm" and click on the play icon in the preview
panel to start the preview

OBSERVED RESULT

The preview does not work (both video and audio) and the following is printed
in the terminal:

QPainter::begin: Paint device returned engine == 0, type: 1
QPainter::begin: Paint device returned engine == 0, type: 1
QPainter::begin: Paint device returned engine == 0, type: 1
(dolphin:20414): GStreamer-Video-CRITICAL **: gst_video_center_rect: assertion
'src->h != 0' failed


EXPECTED RESULT

The preview works (both video and audio)


SOFTWARE/OS VERSIONS
- Distro: Gentoo
- KDE Plasma Version:  5.25.5
- KDE Frameworks Version: 5.97.0
- Qt Version: 5.15.5
- Dolphin version: 22.08.1
- X11

ADDITIONAL INFORMATION

I don't have the issue with HEVC or x264 video files. I tried with multiple AV1
videos with different extensions (avi,mkv,mp4): same issue

Installed packages and versions:

- kde-apps/ffmpegthumbs:22.08.1
- kde-apps/kdesdk-thumbnailers:22.08.1
- kde-apps/thumbnailers:22.08.1
- kde-frameworks/kimageformats:5.97.0
- dev-qt/qtimageformats:5.15.5-r2
- media-libs/phonon-gstreamer:4.10.0

Relevant USE flags:

kde-frameworks/kfilemetadata epub ffmpeg

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