Bug 513447 - "Severe audio distortion with Crossfeed/Deesser/Haas/Limiter/Pan/Stereo Tools/StereoWidener on Manjaro"
Summary: "Severe audio distortion with Crossfeed/Deesser/Haas/Limiter/Pan/Stereo Tools...
Status: REPORTED
Alias: None
Product: kdenlive
Classification: Applications
Component: Audio Effects & Transitions (other bugs)
Version First Reported In: 25.08.3
Platform: Manjaro Linux
: NOR normal
Target Milestone: ---
Assignee: Jean-Baptiste Mardelle
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-12-16 17:13 UTC by diekuhrannte@web.de
Modified: 2025-12-19 16:35 UTC (History)
0 users

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


Attachments

Note You need to log in before you can comment on or make changes to this bug.
Description diekuhrannte@web.de 2025-12-16 17:13:26 UTC
Problem:
Audio effects Compressor/Eypander (avfilter.compand), Crossfeed, Crystalizer, Deesser, Haas Stereo Enhancer, Limiter, Pan, Simple Compressor/Expander (avfilter.acontrast), Stereo tools, Stereo widener, cause extreme distortion/clipping in timeline playback AND rendered output. Same clip sounds perfect in Clip Monitor.

STEPS TO REPRODUCE


    New project (default settings)

    Import any WAV file, place on single audio track (no video, no other tracks/effects)

    Apply one of listed effects (e.g. Limiter, Stereo Tools)

    Timeline playback: heavily distorted/clipped

    Render to any format (e.g. MP4, WAV): distorted identically

    Clip Monitor playback: clean audio


OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
System: Manjaro XFCE (current), Kdenlive 25.12.0 (and previous version), MLT 7.34.1, only SDL audio backend available.

ADDITIONAL INFORMATION
IMPORTANT: Official Kdenlive AppImage (same version) with identical project/clip/effect: perfect playback and render. No config changes, clean user profile tested.

Likely packaging issue in Manjaro's MLT/Kdenlive build affecting audio effect processing.
Comment 1 diekuhrannte@web.de 2025-12-16 17:36:43 UTC
Manjaro packaging issue confirmed:
- All functional MLT/FFmpeg versions show identical distortion
- Downgrades break dependencies (missing libs)
- AppImage works perfectly as control group
→ Manjaro maintainers: please check FFmpeg/MLT build flags post-8.12.2025
Comment 2 diekuhrannte@web.de 2025-12-17 20:42:39 UTC
Strange, there was just a new update to Kdenlive 25.12.0-1.0, but there has been no improvement in the audio effects.
Comment 3 diekuhrannte@web.de 2025-12-19 16:34:56 UTC
Noch ein Hinweis: Wenn man die updates bei Manjaro und Kdenlive Repos macht, dann startet Kdenlive nicht mehr, es sei denn, man löscht zuvor die kdenliverc.
Comment 4 diekuhrannte@web.de 2025-12-19 16:35:43 UTC
One more note: If you update Manjaro and Kdenlive Repos, Kdenlive will no longer start unless you first delete kdenliverc.