[Webkit-unassigned] [Bug 230057] New: [GStreamer] Green screen instead of playing video

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230057

            Bug ID: 230057
           Summary: [GStreamer] Green screen instead of playing video
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: wk at genodeftest.de
                CC: bugs-noreply at webkitgtk.org

Steps to reproduce:
1. Start epiphany
2. browse any website with video
3. start video

What should happen:
Play video. If it cannot be done using hardware acceleration, use software video decoding instead. If that is also not possible, show an error message.

What happens:
Green screen instead of video. Video stops after some time.

Example output on command line:
```
$ LC_ALL=C epiphany https://winfuture.de/videos/Hardware/Fairphone-3-im-Hands-On-Transparentes-fair-gebautes-Smartphone-20630.html
failed to open /usr/lib64/dri/hybrid_drv_video.so
Not using hybrid_drv_video.so
failed to open /usr/lib64/dri/hybrid_drv_video.so
Not using hybrid_drv_video.so
failed to open /usr/lib64/dri/hybrid_drv_video.so
Not using hybrid_drv_video.so

** (epiphany:252407): WARNING **: 19:29:51.802: GDK is not able to create a GL context, falling back to glReadPixels (slow!): Unable to create a GL context
```
(Note that I don't have a hybrid GPU system, only an Intel iGPU)

Software version info:
epiphany-40.3-1.fc34.x86_64
webkit2gtk3-2.32.3-1.fc34.x86_64
glib2-2.68.4-1.fc34.x86_64
gtk3-3.24.30-1.fc34.x86_64
gstreamer1-1.19.1-2.1.18.4.fc34.x86_64
gstreamer1-vaapi-1.19.1-2.1.18.4.fc34.x86_64
gstreamer1-libav-1.18.4-3.fc34.x86_64
libva-2.11.0-1.fc34.x86_64
libva-intel-driver-2.4.1-5.fc34.x86_64

I am willing to provide more debugging info but I don't know where to start debugging.

Note: This issue was first reported on https://gitlab.gnome.org/GNOME/epiphany/-/issues/1594 and put here due to a hint by Michael Catanzaro.

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