Environment¶

This section defines some of the most important settings for Kdenlive.

1:: Concurrent threads. Defines the number of threads to use for proxy clip generation and transcode jobs. Those jobs will run in the background. The value entered is passed to ffmpeg as the -threads parameter. Increasing this parameter may not have an effect if you have changed the proxy encoding settings using project settings to a codec that ffmpeg does not do multi-threading on. Multi-threading is supported for MPEG-2, MPEG-4, H.264, and VP8.
2:: Use lower CPU priority. This instructs Kdenlive to lower the priority of the proxy clip generation and transcode jobs. It helps keeping the main UI responsive when proxies are created or clips are being transcoded.
3:: Warn if cached data exceeds. Add a maximal cache size that Kdenlive checks every two weeks. Kdenlive issues a warning message if the total cached data size exceeds this limit. If you need to purge the cache, use the Manage Cached Data feature.
4:: Check for updates. If checked, Kdenlive will show a pop-up window with a reminder if your version is older than six (6) months.
5:: Tabs for the different environment settings.

MLT Environment¶

These settings tell Kdenlive where to find the MLT executables and profile files. Only advanced users would really need to change these settings. Kdenlive is basically a frontend to the MLT program. If you have MediaInfo installed and provide the path here, Kdenlive shows more details in the clip properties. The values differ depending on your OS.

Kdenlive_Configure_environment_MLT_Windows — Environment variables in Kdenlive installed on Windows¶

Kdenlive_Configure_environment_MLT_Linux — Environment variables in Kdenlive installed on Linux¶

configure_environment_mlt_appimage_2412 — Environment variables in Kdenlive appimage on Linux¶

Default Folders¶

These settings tell Kdenlive where project files are to be stored. It also controls what folder Kdenlive will use as a temporary file storage location and where files captured from an external source will be saved.

configure_environment_default_folders_appimage_2412.webp — Default folders on Linux (appimage).¶

configure_environment_default_folders_linux_2412 — Default folders on Linux (flatpak).¶

Kdenlive_Configure_environment_default_folders_MacOS — Default folders on MacOS.¶

Python¶

Python is used for the speech-to-text feature. These settings tell Kdenlive where Python can be found on your system or whether a virtual environemnt (venv) should be set up and used.

Use python virtual environment (recommended). When enabled, Kdenlive creates a venv folder and copies/symlinks Python into this folder.

Using the virtual environment (venv) stores Python as you have installed it on your system in the venv folder. If you install speech to text, the VOSK and Whisper libraries will be installed in the venv folder as well.

This has many benefits including easier dependency management and reduced risk of package conflicts and errors caused by software deprecation.

Path for venv:

Linux: ~/.local/share/kdenlive/venv
Windows: %LocalAppData%\kdenlive\venv

To remove the installed venv packages click on Delete. This will completely remove the venv folder with all installed packages. Note that this does not remove the downloaded models (VOSK/Whisper) that can still occupy significant disk space.

Kdenlive_Configure_environment_python — Python tab on Windows¶

configure_environment_python_appimage_1_2412 — Python tab on Linux (appimage) not using venv¶

configure_environment_python_flatpak_1_2412 — Python tab on Linux (flatpak) not using venv¶

configure_environment_python_flatpak_2_2412 — Python tab on Linux (flatpak) using venv¶

Default Apps¶

These settings control which external application opens when you choose Edit Clip for a clip in the Project Bin.

Image editing: A free software would be Krita.

Audio editing: A free software would be Audacity.

Animation editing: Kdenlive integrates nicely with and updates files automatically which are saved in Glaxnimate which is available from its homepage for Linux, Windows, and MacOS.

Bemerkung

Mac user: See these instructions how to install and run dmg files.

Bemerkung

Windows user: Make sure all the paths point to an .exe file. glaxnimate.exe is in folder %PROGRAMFILES%\glaxnimate\bin\.

Example

Mime types¶

Specifies the Media Types (formerly known as MIME types) which Kdenlive can work with.