Bug 1227461

Summary:	KRdp requires ffmpeg from Packman (missing h264 encoder)
Product:	[openSUSE] openSUSE Tumbleweed	Reporter:	Andrei Borzenkov <arvidjaar>
Component:	KDE Workspace (Plasma)	Assignee:	E-Mail List <opensuse-kde-bugs>
Status:	RESOLVED UPSTREAM	QA Contact:	E-mail List <qa-bugs>
Severity:	Normal
Priority:	P5 - None	CC:	fabian, idesmi, pfmiller
Version:	Current
Target Milestone:	---
Hardware:	Other
OS:	Other
Whiteboard:
Found By:	---	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Andrei Borzenkov 2024-07-06 06:40:11 UTC

When I go to KDE System Settings, and then select the “Remote Desktop” sub-menu, I see the following error at the top of the window:

“Remote desktop cannot be enabled because your system does not support H264 video encoding. Please contact your distribution regarding how to enable it.”

libopenh264 is installed.

My gut feeling is that openSUSE patches ffmpeg to load openh264 library on demand and checks that KRdp performs do not trigger loading of it. Internet search only finds this issue on openSUSE which indirectly confirms it.

… quickly checking - yes, replacing ffmpeg packages (and only ffmpeg packages) with Packman version fixes KRdp error.

See details in

https://forums.opensuse.org/t/plasma-remote-desktop-krdp-and-h264-video-encoding-issue/176227

Comment 1 Fabian Vogt 2024-07-06 11:46:37 UTC

kpipewire needs to support openh264: https://bugs.kde.org/show_bug.cgi?id=476187

Should be fairly simple to implement, but supposedly its encoding might not be suitable for krdp? Worth a try though and probably better than nothing.

Comment 2 Andrei Borzenkov 2024-07-06 15:31:53 UTC

(In reply to Fabian Vogt from comment #1)
> supposedly its encoding might not
> be suitable for krdp?

That is exactly the point of this bug report - if krdp is not usable without Packman, it should not be distributed in the main openSUSE repository.

Comment 3 Fabian Vogt 2024-07-06 20:34:36 UTC

I made a MR: https://invent.kde.org/plasma/kpipewire/-/merge_requests/152

FWICT, libfreerdp itself can use ffmpeg and libopenh264, but krdp uses kpipewire for encoding. No idea why.