Building with rnnoise

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1

I built Kdenlive 26.07.70 with kde-builder, only to discover that effects aren’t categorized and that rnnoise is not available as an effect. I think it was available in the Flatpak version. I looked at excluded_effects.txt and rnnoise is not there. Why did this happen, and how can I use this effect again?

2

Update: I built manually with the latest commit, and the result doesn’t change.

When I tell it to remove the effect (since I’m opening a project that already has it), it crashes:

qt.qpa.services: Failed to register with host portal QDBusError("org.freedesktop.portal.Error.Failed", "Could not register app ID: App info not found for 'org.kde.kdenlive'")
lo server running on 17620
Starting render server
org.kde.kdenlive: Profile  "" not found. Returning default profile instead.
Empty metadata for  "telecide"
kf.i18n: Trying to convert empty KLocalizedString to QString.
Empty metadata for  "glsl.manager"
qt.multimedia.ffmpeg: Using Qt multimedia with FFmpeg version 7.1.2 GPL version 3 or later
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
qt.core.qobject.connect: QObject::connect(Core, GuidesProxyModel): signal not found
QObject::disconnect: wildcard call disconnects from destroyed signal of QAction::options_configure_toolbars
qt.core.qfuture.continuations: Parent future has 2 result(s), but only the first result will be handled in the continuation.
qt.core.qobject.connect: QObject::connect(AudioDevInfo, Unknown): invalid nullptr parameter
qt.core.qobject.connect: QObject::connect(AudioDevInfo, MediaCapture): invalid nullptr parameter
KCrash: Application 'kdenlive' crashing... crashRecursionCounter = 2
Segmentation fault         (core dumped) kdenlive
3

Additionally, I should note I’m on Fedora Linux 43.

4

Are you sure this is rnnoise? Because I searched the mlt and ffmpeg repositories/documentation and could not find it. And if they don’t have it, Kdenlive doesn’t have it.

5

In the last two weeks I downloaded a version of Kdenlive from an official source that had it. It has an XML file in data/effects/ladspa, so it must be available somehow.

6

Ok, that explains it. This is a LADSPA filter, and those are not necessarily to be found by that name in Kdenlive. The one you are looking for is Microphone background noise removal filter (LADSPA filter #9354877). This is available in 26.04.

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7

Just out of curiosity: What is the official source?

8

I didn’t remember yesterday, but now I am pretty sure it’s the AppImage.

9

Ok, so the official source is the Kdenlive Downloads page.

10

Huh, so it’s only available on that specific version for now, and doesn’t carry to the unstable versions. I got the AppImage to run again, and everything is fixed for now.

11

Not sure I understand your comment. We don’t backport, unless it’s a bug fix, and then it’s only for the current release, hence the .1, .2, and .3 versions.

If effects are enabled or disabled, it only affects the current and future releases. In your case I haven’t checked whether 25.12 or earlier releases had or didn’t have this particular LADSPA effect.

Just FYI, we recently reevaluated and tested all SWH audio filters (part of LADSPA) and enabled a first batch of them again in 26.04. More will follow in future releases. We are also looking into LV2 audio filters.

12

I built from source, which is already ahead of 26.04, so the effects were all messed up. Using the AppImage of the stable version brought everything back to normal. I’m not sure I understand your comment either.

13

Additionally, old (i.e. from two weeks ago) projects now crash the software when loaded, but I think that’s beyond the scope of this thread.