https://bugs.kde.org/show_bug.cgi?id=510256
Bug ID: 510256
Summary: Latest version of Kdenlive cannot decode most video
files
Classification: Applications
Product: kdenlive
Version First 25.08.1
Reported In:
Platform: Flatpak
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Monitors & Playback
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
Hi.
The latest version of Kdenlive (25.08.1, flatpak) cannot decode most h.264 and
VP9 files on my system (Fedora Sliverblue 42).
When the clip is shown in the clip monitor, the audio playback functions
correctly, but the video just shows a "transparency checkerboard" and shows
these errors when launched via commandline:
h.264 file:
[libopenh264 @ 0x563bfdfa1300] [OpenH264] this = 0x0x563c011db500,
Error:DecodeCurrentAccessUnit()::::::PrefetchPic ERROR, pSps->iNumRefFrames:4.
[libopenh264 @ 0x563bfdfa1300] DecodeFrame failed
VP9 file:
[opus @ 0x7f227c036e40] Could not update timestamps for discarded samples.
[opus @ 0x7f227c034840] Error parsing Opus packet header.
If the clip is placed on the timeline and the playhead is over it, the project
monitor shows a black screen.
Downgrading via the command below fixes the issue (Kdenlive still says it's at
version 25.08.1 in the about menu for some reason?)
'run0 flatpak update
--commit=9f28077f3e213194be22abf099c44bd21d1c8f57c3b296ba8583690a333dd629
org.kde.kdenlive'
STEPS TO REPRODUCE
1. Drop an mp4 in the project bin
2. Click on it
OBSERVED RESULT
The clip monitor can play audio, but shows a "transparency checkerboard"
instead of the video.
EXPECTED RESULT
The clip monitor can play the video correctly.
SOFTWARE/OS VERSIONS
Linux: Fedora Silverblue 42.20251005.0
Kdenlive: 25.08.1 (flatpak)
CPU: AMD Ryzen™ 5 9600X × 12
GPU: AMD Radeon™ RX 7600
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