Bug 509501

Summary:	k3b-25.08.1 fails to build with ffmpeg-8.0
Product:	[Applications] k3b	Reporter:	David Korth <gerbilsoft>
Component:	Plugins	Assignee:	K3b Bugs <k3b-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	michalm, trueg
Priority:	NOR
Version First Reported In:	25.08.1
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:	https://invent.kde.org/multimedia/k3b/-/commit/a76371f71ce29110afd3dcbe2d2b3375b65cf03c	Version Fixed In:
Sentry Crash Report:

Description David Korth 2025-09-14 22:30:14 UTC

SUMMARY
K3b 25.08.1 fails to build with ffmpeg-8.0 due to its use of avcodec_close() in k3bffmpegwrapper.cpp. This function was deprecated in a previous version, and completely removed in ffmpeg-8.0. The recommended fix is to simply remove it; avcodec_free_context(), which is used right after avcodec_close() in k3bffmpegwrapper.cpp, automatically handles closing the codec.

STEPS TO REPRODUCE
1. Install ffmpeg-8.0.
2. Attempt to build k3b-25.08.1.

OBSERVED RESULT
k3b-25.08.1 fails to build due to avcodec_close() not being declared in the ffmpeg headers.

EXPECTED RESULT
k3b-25.08.1 builds.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux 6.16.7
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2

ADDITIONAL INFORMATION
I'm not sure which version of ffmpeg avcodec_close() was deprecated in, but presumably it was actually needed before, so a preprocessor macro should be used to check for ffmpeg-8.0 and only use avcodec_close() if it's an older version.

Comment 1 Heiko Becker 2025-09-16 05:44:45 UTC

Git commit c10b680b224c0fb7ee77301b1532b0c5682004cc by Heiko Becker.
Committed on 15/09/2025 at 22:27.
Pushed by aacid into branch 'master'.

Fix build with ffmpeg >= 8

M  +4    -0    plugins/decoder/ffmpeg/k3bffmpegwrapper.cpp

https://invent.kde.org/multimedia/k3b/-/commit/c10b680b224c0fb7ee77301b1532b0c5682004cc

Comment 2 Albert Astals Cid 2025-09-16 20:52:56 UTC

Git commit a76371f71ce29110afd3dcbe2d2b3375b65cf03c by Albert Astals Cid, on behalf of Heiko Becker.
Committed on 16/09/2025 at 20:52.
Pushed by aacid into branch 'release/25.08'.

Fix build with ffmpeg >= 8
(cherry picked from commit c10b680b224c0fb7ee77301b1532b0c5682004cc)

M  +4    -0    plugins/decoder/ffmpeg/k3bffmpegwrapper.cpp

https://invent.kde.org/multimedia/k3b/-/commit/a76371f71ce29110afd3dcbe2d2b3375b65cf03c