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Miscellaneous

- Presentation of my configuration
- Controlling a garmin GPS watch

Multimedia

- Definitions and other concepts in video
- Basic tools for video
- Video container
- Video players
- Transcoding and DVD ripping
- Audio and karaoke players
- Managing audio metadata and playlists
- Kodi mediacenter

Video editing

- The basics of video editing
- Installation of video editing software
- Editing your video with Kdenlive
- Editing your video with Cinelerra
- Editing your video with OpenShot Video Editor
- Editing your video with Pitivi Video Editor
- Editing your video with Flowblade Video Editor
- Editing your video with Shotcut

Edit your video with kdenlive

- Introduction
- Presentation and configuration
- Project preparation
- Fixing performance issues
- Roughing
- Applying effects
- Adding transitions
- Managing titles and subtitles
- Managing keyframes
- Video grading
- Exporting your video

Network and system

- OpenLDAP
- User authentication system with OpenLDAP
- Install a VPN network with OpenVPN
- System and data backup tools
- Cloud backup with infomaniak kdrive and Google Drive (with encryption)
- Check the integrity of your disks with smartmontools

Email management

- Receiving mail and making it available (POP, IMAP and webmail)
- Fighting spam and viruses
- Managing mail transport with sendmail

LAMP

- Use a DBMS with MariaDB
- Apache PHP MariaDB (with sources)
- Analyse logs Apache

Securing

- A word about cryptographie
- Securing your linux workstation
- Video surveillance system

Applying effects with kdenlive

Applying effects with Kdenlive

Last modified August 2, 2024

This site has been automatically translated with Google Translate from this original page written in french, there may be some translation errors

Object

This page is part of a tutorial to explain video editing with kdenlive and which includes the following topics:

Add an effect

Now we are going to add an effect to a clip, in the top tab Effects you have a whole stock of them sorted by category. By clicking on you have the list of main effects


By clicking on you have the exhaustive list of effects


And if that's still not enough, you can download effects made available by the community with the download icon that appears on the far right and you can then download the effect that interests you.


You can also access the full effects set from the Edit->Add Effect menu and this is what it looks like just for the Equalizers and Filters effects .



Note that you can apply an effect to all clips on all tracks, just click on the Master button (bottom left, below), then drag the effects you want into the Master rectangle of the timeline, here Contrast and  Saturation, in the effects stack, I find my Global Effects



To return to the display of the Global Effects, you will have to click on the Master button of the timeline. Another illustration to have fun, we will choose the audio effect Audio wave filter that we will place in the Global Effects, in practice this allows you to see the waveforms of the stereo audio band displayed superimposed on the video, we will just have a few adjustments of position, size and color to make.


You can also disable the effect on a clip by clicking on the name of the effect which appears superimposed on the clip in the timeline.


Let's go back to the effects that appear in the Effects tab, we're going to add a Contrast effect, we're going to drag it onto the clip that interests us, we're then going to play on the effect parameters from the effect properties that appear in the Effects/Compositions Stack tab.



To see what it looks like, just click on the first button in the series of icons in the clip properties. Here we will have chosen the Contrast and Saturation effects. In the project monitor we can clearly see the difference.



The sound of the audio tracks may overlap with our soundtrack, we will choose to deactivate them by clicking on the small speaker at the audio track level.



On the other hand, if you do not want to mute all the clips on the track, you can select the clips to mute on the track (and only those) by adding an audio effect Volume and dynamics->Mute. This will give something like this on the audio track A1, the first clip is audible and the others have a Mute effect, the audio track A2 is completely muted.

It's starting to be a lot of effects, and it's easy to get lost, so I recommend that you select the effects you use the most and put them in favorites. To do this, simply display the complete list, select the desired effect and add it to your favorites using the context menu.


Now if we click on we only access the audio effects, the button  allows access to the custom effects



We will see a little later how to customize the effects. Finally, the button allows you to access your favorite effects







From version 24.02 onwards, you can apply an effect to several clips from different tracks. Simply select them on the timeline and then click on the tool to select a favorite effect that you can drag and drop onto the selection, which will automatically apply to all selected clips.


Starting from version 24.05, you can change the effect parameters for all selected clips.

Most of the time we will use the same effects with the same settings, it is then useful that they are more easily accessible, we will already save them with the custom settings. Example below with the Saturation effect that we will save with the value 302 from the floppy disk button pointed by the mouse



We save it under a custom name (for me simply Saturation302 ), the custom effects will then be accessible by clicking on the tool in the Effects tab.



It can then be added to the favorite effects accessible via the timeline button


Even better, you systematically apply the same effects, you can create groups of effects with custom settings that you can reuse and apply to other clips at will. For this, to my Saturation302 effect I add a Contrast350 with custom settings and we save the stack of effects Save the stack of effects... I call it Group-effects-1


We find our group of effects in the Effects tab which we can also add to favorites and apply (by simple drag and drop) to the clips in the timeline.

To slow down or speed up an audio or video clip, from the context menu click on Change speed



if we choose to slow down the clip (with a speed lower than 100) will be longer it will be necessary to make room to the right of the clip by moving the clips that follow on the timeline (or by moving them to another track). Also note the option that allows you to reverse the clip as mentioned above and the Pitch Compensation option which allows you to limit sound distortion.


Note the appearance of the Time scale modification function ( Time remap in English) accessible from the context menu by clicking on a clip in the timeline, or via the View->Duration change menu, which allows much finer management of the clip speed and which uses the key frames that we will see later.

The Pillar Echo effect is interesting for portrait sized videos from a mobile phone, it will automatically fill the black bars on the right and left if your project is landscape sized.

Still in the category of effects, we can also use the motion tracking effect . In the example below, we display a red arrow above a person to follow. At the beginning of the clip, we must frame the object to follow, choose an algorithm and see what it gives, then click on Analysis


Motion tracking is notably used to blur a face.

This effect is enhanced by the DaSiamRPN algorithm or in other words Distractor-aware Siamese Networks for Visual Object Tracking. You will need to follow the instructions given here https://docs.kdenlive.org/en/effects_and_compositions/video_effects/alpha_mask_keying/motion_tracker.html you will first need to retrieve files with the .onnx extension and then place them in the homedirectory under ~/.local/share/kdenlive/opencvmodels with an opencvmodels directory that you will probably need to create beforehand.


When you click on Analysis , the effect will generate a large number of key frames that correspond to the spacing that has been set (here 5), you will have to manually move from key frame to key frame to check that the algorithm has worked well because at times it can go off the rails and not place the shape of the frame (here a rectangle) properly, in this case you have to help it a little and replace the shape correctly.

To be complete in terms of effects, you can apply an effect for a particular region of a clip. The steps are as follows:
- first select the Rotoscoping (Mask) effect and draw your shape, possibly making it evolve over the course of the clip by creating several key frames (see below for the use of key frames)
- select the effect to apply, here Sepia
- then select the Mask Apply effect


The 2D animation tool Glaxnimate is now integrated into kdenlive and accessible via the main window with the button .
This will launch the Glaxnimate tool , I will not go into the details of its use here, the documentation is quite poor on the net.


Once the animation is saved, the animation appears in the project files which you just need to drag into the timeline.


I invite you to browse the list of effects, there are dozens and dozens of them, not always easy to use and well documented, but you will only be limited by your imagination because they really allow you to do everything that is possible to do on the best video editing software, including professional ones.

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