Bug 495682

Summary:	abysmal performance/freezes without audio output device on windows with SDL backend
Product:	[Applications] kdenlive	Reporter:	hrncn <ericwild724>
Component:	User Interface & Miscellaneous	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	REPORTED ---
Severity:	major	CC:	fritzibaby, luzpaz, miserablesabit
Priority:	NOR
Version First Reported In:	24.12.1
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description hrncn 2024-11-01 10:36:34 UTC

Merely starting kdenlive on windows 11/23h2 without any audio output devices (= disconnected bluetooth headset) right after installing it leads to UI freezes that last many seconds and happen all the time, on startup, when trying to load a file, basically when doing anything. It is basically completely unusable. Switching the audio device to auto in kdenlive does not help. This affects 23.08 as well.

It took quite some time to figure out that

* just turning the headset on is enough to fix this
* OR changing the backend from SDL to RtAudio 

because I first suspected HW acceleration, general performance issues, ..

Comment 1 aristsakas 2026-01-15 14:15:26 UTC

*** Bug 499687 has been marked as a duplicate of this bug. ***

Comment 2 aristsakas 2026-01-15 14:18:55 UTC

*** Bug 499655 has been marked as a duplicate of this bug. ***

Comment 3 luzpaz 2026-02-03 16:35:36 UTC

This needs a diagnosis.