Bug 506799 - Every window-specific screencast appears green in VLC, and others render with incorrect colours in Spectacle's previewer
Summary: Every window-specific screencast appears green in VLC, and others render with...
Status: RESOLVED UPSTREAM
Alias: None
Product: Spectacle
Classification: Applications
Component: General (other bugs)
Version First Reported In: 6.4.2
Platform: Fedora RPMs Linux
: NOR normal
Target Milestone: ---
Assignee: Noah Davis
URL: https://bugreports.qt.io/browse/QTBUG...
Keywords:
Depends on:
Blocks:
 
Reported: 2025-07-09 13:22 UTC by Roke Julian Lockhart Beedell
Modified: 2025-09-13 10:21 UTC (History)
2 users (show)

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


Attachments
A Screencast That Is Affected By This (1.85 MB, video/webm)
2025-07-09 13:22 UTC, Roke Julian Lockhart Beedell
Details
A Screencast Which Demonstrates The Difference Between Full-Screen And Window-Specific Screencasts, And Confirms The Greenness (2.78 MB, video/webm)
2025-07-09 13:23 UTC, Roke Julian Lockhart Beedell
Details
A Screenshot Of Dolphin Not Reproducing This In Its Player (214.18 KB, image/png)
2025-07-09 13:38 UTC, Roke Julian Lockhart Beedell
Details
A Screenshot Of Gwenview Not Reproducing This In Its Player (619.92 KB, image/png)
2025-07-09 13:39 UTC, Roke Julian Lockhart Beedell
Details
A Screenshot Of `spectacle-6.4.4-1`'s Thumbnailer Rendering Mostly Green Lines On Greyscale (1.71 MB, image/png)
2025-08-27 10:00 UTC, Roke Julian Lockhart Beedell
Details

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Description Roke Julian Lockhart Beedell 2025-07-09 13:22:10 UTC
Created attachment 183088 [details]
A Screencast That Is Affected By This

SUMMARY

Every window-specific screencast I record on my FW16 has a green sheen overlaid.

STEPS TO REPRODUCE

`spectacle --record w`

OBSERVED RESULT

The consequent screencast is a luminous green.

SOFTWARE/OS VERSIONS

> ~~~
> Operating System: Fedora Linux 42
> KDE Plasma Version: 6.4.2
> KDE Frameworks Version: 6.15.0
> Qt Version: 6.9.1
> Kernel Version: 6.15.4-200.fc42.x86_64 (64-bit)
> Graphics Platform: Wayland
> Graphics Processor: AMD Radeon 780M Graphics
> Manufacturer: Framework
> Product Name: Laptop 16 (AMD Ryzen 7040 Series)
> System Version: A7
> ~~~
Comment 1 Roke Julian Lockhart Beedell 2025-07-09 13:23:55 UTC
Created attachment 183089 [details]
A Screencast Which Demonstrates The Difference Between Full-Screen And Window-Specific Screencasts, And Confirms The Greenness

I've attached a screencast that demonstrates that it's green, in case you somehow don't see it on your end (like if it's a decoder fault).
Comment 2 Roke Julian Lockhart Beedell 2025-07-09 13:38:25 UTC
Created attachment 183090 [details]
A Screenshot Of Dolphin Not Reproducing This In Its Player

This doesn't affect Dolphin (when playing; not merely the thumbnailer) and Gwenview. I presume that this should be closed, and refiled at https://code.videolan.org/videolan/vlc/-/issues/new? Apologies for being a little quick, but this is probably best, since I can't myself ascertain whether Spectacle is doing something strange, or VLC is deficient.
Comment 3 Roke Julian Lockhart Beedell 2025-07-09 13:39:01 UTC
ใ€ƒ
Comment 4 Roke Julian Lockhart Beedell 2025-07-09 13:39:47 UTC
Created attachment 183091 [details]
A Screenshot Of Gwenview Not Reproducing This In Its Player
Comment 5 Noah Davis 2025-07-10 16:47:37 UTC
I have seen a weird green coloring issue before in Spectacle's own video player, but it eventually went away. In my case, they were green bands rather than the whole image being green. It's probably a decoder issue as you said or driver related issue since there is usually some degree of accelerated decoding for the video formats supported by Spectacle.
Comment 6 Roke Julian Lockhart Beedell 2025-07-10 23:10:13 UTC
(In reply to Noah Davis from comment #5)

Thanks. Considering that VLC utilises custom decoders that it includes via a library marked as a mandatory dependency of the package, I've filed https://code.videolan.org/videolan/vlc/-/issues/29210.
Comment 7 Bug Janitor Service 2025-07-25 03:46:52 UTC
๐Ÿ›๐Ÿงน โš ๏ธ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

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Comment 8 Roke Julian Lockhart Beedell 2025-07-25 08:13:29 UTC
(In reply to Roke Julian Lockhart Beedell from comment #6)

Setting as RESOLVED MOVED, since solely VLC struggles with this.
Comment 9 Roke Julian Lockhart Beedell 2025-08-27 10:00:04 UTC
Created attachment 184494 [details]
A Screenshot Of `spectacle-6.4.4-1`'s Thumbnailer Rendering Mostly Green Lines On Greyscale

(In reply to Roke Julian Lockhart Beedell from comment #6)

I think VLC might merely have been a symptom. I'll tentatively reopen, for the attached screenshot of `spectacle-6.4.4-1` appears to demonstrate that its previewer is affected, too.
Comment 10 Nate Graham 2025-08-27 17:17:38 UTC
This is a Qt bug: https://bugreports.qt.io/browse/QTBUG-138679
Comment 11 Roke Julian Lockhart Beedell 2025-08-27 21:27:02 UTC
(In reply to Nate Graham from comment #10)

Thank you! Do you reckon that both behaviours โ€“ the full-screen green overlay (especially in VLC), and the newfound artefacting in Spectacle โ€“ are the same? I hoped I hadn't conflated them, but I'd like to confirm. If they're both caused by that issue, I'll close the VLC report, too.
Comment 12 Nate Graham 2025-08-27 21:56:21 UTC
Yeah, they're the same.