j-b-m's blog

Moving Kdenlive's forum

The Kdenlive forums, that were usually hosted on kdenlive.org have moved!
Our forums are now hosted on KDE's forum website.

Existing posts have now been migrated to the new forum.

This move was decided because our kdenlive.org server could not handle the load anymore, and also because for a long time we wanted to tighten our links with the KDE community.

This will also help our developers to concentrate on Kdenlive's code, not on website maintenance.
So for now you can find the following Kdenlive resources on KDE's infrastructure:

We hope this will bring all users a better experience.

If you had an account on forum.kde.org and on kdenlive.org both registered to the same email address then your posts at kdenlive.org will have been merged into your forum.kde.org account. If you did not have an account on forum.kde.org then one will have been created for you on forum.kde.org with the same user name and email address as you had on forum.kde.org (Unless this user name was already in use at forum.kde.org. In this case a user will have been created with your kdenlive.org user name suffixed with _drupal). The new accounts created by the forum migration will need a new password before you can send to them. Request this at https://forum.kde.org/ucp.php?mode=sendpassword .

If anyone got the "_drupal" suffix and wants to change their username, just send a mail to the admins (forum-admin@kde.org).

Kdenlive: spring cleaning

Here are some news on what is happening with Kdenlive's video editor. Last year, we launched a successful IndieGoGo campaign to sponsor Till Theato's work on Kdenlive.

I have finally found time to start merging his great work so that we can clean up Kdenlive and move towards the future.

I will merge my work in the next days in Kdenlive's git master. This means that the master branch will become unusable for editing for a few months until we stabilize everything. So everyone using Kdenlive from git will need to switch to the v0.9 branch if they want to be able to do editing.

This work will bring in some exciting changes, like performance improvements and usability enhancements.
Since we will also improve the integration of the MLT framework in the process, we will also benefit from exciting new features like the high quality accelerated movit filters, and the new spline based animation feature.

I will try to post updates on a regular basis, so that people can also join the development.

Kdenlive 0.9.6 released

We are happy to announce the immediate release of Kdenlive 0.9.6.

This version fixes several bugs and crashes, including a very annoying bug that caused project files to seem corrupted. All users are strongly encouraged to upgrade.

You will find detailled infos about the changes in this release on our Kdenlive 0.9.6 info page.

The source code can be downloaded from the KDE servers, there are 2 available tarballs, since we decided to also distribute Kdenlive with its user manual:

Packages for your distributions should hopefully be available soon.
It is recommended to use the latest version of the MLT framework (0.8.8) to get the recent bugfixes and improvements.

As usual, a big thank you to all those who helped us make this release better by giving us feedback and investigating the bugs they found.
You can check the Kdenlive online manual and forums for documentation and help.

For the Kdenlive team,

Jean-Baptiste Mardelle

Kdenlive 0.9.4 released

We are finally releasing version 0.9.4 of the Kdenlive video editor after several delays.

This version fixes several bugs and crashes, all users are encouraged to upgrade. The source code can be downloaded from the KDE servers, packages for your distributions should hopefully be available soon. It is also recommended to use the latest version of the MLT framework (0.8.8) to get the recent bugfixes and improvements.

You will find detailled infos about the new features / fixes on our Kdenlive 0.9.4 info page.

Our efforts will now concentrate on merging the refactoring work started by Till Theato (as a result of our fundraising campain) , and cleaning the codebase to make it easier to evolve and integrate the future developments in the MLT video framework.

As usual, a big thank you to all those who helped us make this release better by giving us feedback and investigating the bugs they found.
You can check the Kdenlive online manual and forums for documentation and help.

For the Kdenlive team,

Jean-Baptiste Mardelle

Preparing for the new Kdenlive release

We are finally preparing the new Kdenlive release that should be out in 10 days (on the 19th of November). Many people are wondering what happened with our successful fundraising, so here is a first update: as it was clearly stated, the fundraising's goal was to clean up Kdenlive's base code. This will not produce immediate benefit for the user, but rather help us for future developments. The result of this refactoring has not yet been merged in Kdenlive's main tree, work will start after this release.

The last months were spent fixing important bugs that were discovered in Kdenlive 0.9.2 and also new issues that happened due to recent fixes in the video framework (MLT) that we use. Several small UI improvements and new features were also introduced as you will discover below. Users that want to help us can try the current development version (see our instructions for testing current development version) to give us feedback before the 19th of November release.

Here are some of the enhancements that will be available in next release:

Rewritten DVD Wizard

The DVD Wizard was mostly rewritten, now allowing 16:9 menus. It now also autodetects the format of your videos and proposes a trandcoding if it is necessary. In fact, you can now drop any video in the Wizard and just click transcode to get it in the correct DVD format.

DVD menus were also broken in the past versions, this should be fixed. While the menu creation remains very basic, you can now add a shadow to the menu's texts to make them look nicer.

Improved clip markers

The clip markers (comments that can be added and used for seeking in the clip) have been improved. You can now have several categories that show up in different colors. Markers can also now be imported and exported, and are compatible with Audacity's format.


Clip analysis feature

An exciting new feature is also introduced in this version: clip analysis. In short, we can have some MLT effects that analyse the clip and store the result for further use. The first usable cases are:
automatic scene detection: Kdenlive can now parse your clips to find the different scenes and add markers or cut the clip accordingly. The process is currently very slow but it's a start.
Improved motion tracking: Kdenlive can also now analyse an object's motion, and the result of this can be used as keyframes for a transition or an effect. For example, you can now have a title clip that follows an object (see small video demo below).
  
Of course, we also benefit from the fantastic work of developers working on FFmpeg, Frei0r and MLT (among others) that make all the video processing behind Kdenlive possible.

Don't hesitate to post feedback in our forums / bugtracker in the next 10 days so that we can make this release even better.
For the Kdenlive team, Jean-Baptiste Mardelle

Kdenlive 0.9.2 released

The 0.9.2 version of Kdenlive has been released, the source package is now available from the KDE servers.
This new release fixes the most important regressions found in the 0.9 version as well as a few other issues.

The crashes in the stop motion widget and composite transition are fixed, slideshows and firewire capture work again. For a full changelog, check our Kdenlive 0.9.2 info page.

Fixing bugs in Kdenlive 0.9

Ten days ago, I released the new 0.9 version of the Kdenlive video editor. Several annoying bugs were quickly detected and most of them are now fixed in git. so I am going to release Kdenlive 0.9.1 soon (hopefully tonight).

The fixes include:

  • Fix freeze when reloading previously missing clip
  • Fade effects lost when moving / resizing clip
  • Undoing change in clip crop start breaking clip
  • Make disabling of track effects possible
  • Fix slideshow clips not working
  • Fix crash on composite transition
  • Fix crash when opening stop motion widget
  • Fix rendering of projects created in another locale

For ubuntu users, these fixes are already available in the sunab's kdenlive-svn PPA, so if you want to give it a try before the official release and give some feedback, that would be great.

Kdenlive 0.9 released


Kdenlive 0.9 has just been released. We encourage all users to upgrade to this new version that fixes many small issues and should improve the overall user experience. Some of the new features include:

Improved effects workflow

The effect stack was rewritten to allow adjusting parameters for several effects in one go. Effects can also be grouped, groups can be saved and effects or groups can be dragged and dropped onto another clip

Automatic audio alignment

If you have been working on a scene with several camcorders, Kdenlive can now automatically align the clips in timeline using the audio.

Easy import of online resources

Kdenlive now has an online resource browser that allows you to easily preview and import audio, graphic and video resources from archive.org, freesound audio library and open clip art.

Usability improvements

Many small improvements and bugfixes should make your use of Kdenlive nicer and smoother, for examples:

  • Recording can now be monitored through the audio and color scopes, audio normalization can analyse audio for better results
  • Allow audio only recording
  • Clips can be sorted by date
  • New effects from MLT / frei0r: video stabilizers, IIR Blur, etc
  • Offline editing (Backup the project with proxy clips only to work on less powerful computers)
  • See a more complete changelog on our Kdenlive 0.9 info page

Get it!

The Kdenlive 0.9 source tarball can be downloaded from the KDE servers: download link.
Binary packages will be announced in our download page

The future

A big thank you to all the people that contributed in one way or another to improve this new version. Some bugfix 0.9.x releases will be made when necessary, but in the background we are working (well mostly Till) on a refactoring to cleanup the code and hope to reach the 1.0 milestone by the end of the year, thanks to the fantastic success of our fundraising campaign.

As usual, users are welcome to join our forums and bugtracker to report problems.


Improving effects workflow in Kdenlive

First, I should say a big thank you to all the people that helped make our Fundraising campaign so successful, but more infos about that will come in the next days. It is anyways really motivating to see that you are supporting us!

On my side, I have been working on a rewrite of the Kdenlive's effect stack. This work has just been merged into master git, so users of sunab's experimental PPA will get it in the next update, probably in 1-2 days.

The highlights are:

  • Adjust parameters for several effects without switching between effects
  • Drag & drop effects from the effect stack to another clip or track
  • Create effect groups that can be saved or dropped to easily pass effects to another clip or track

I tested the new features for some time now, there are probably a few bugs, but it is really worth it in my opinion, So I am waiting for your feedback & bug reports. And here is a small video demonstrating the new effect stack (video link):

Jean-Baptiste Mardelle

Kdenlive - latest developments

Here is a quick info on the features introduced in Kdenlive git since the release of Kdenlive 0.8.2.1.

Audio Recording


Capture through MLT's avformat producer now supports audio only capture. It even works while playing the timeline, so that you can record a comment while viewing your project. You can see a screenshot of the updated capture widget.

Clip Jobs


A generic job framework was introduced, based on the proxy clip feature. Here are some of the consequences:

  • It means first that the proxy clip got some UI improvements. Progress of the proxy job is now shown in a small progress bar at the bottom of the clip thumbnail, so that the operation is not distrubing your workflow.
  • Then, the new job framework is intended to make it easier to introduce new operations on project clip, for example a new Extract zone feature allows to cut parts of a clip without re-encoding (using FFmpeg codec copy feature).
  • Another related feature is the introduction of clip analysis for some effects. For now, it is available in the "Sox Gain" effect that now has a "Normalize" button. This will trigger an analysis of the clip to find the best gain correction.
  • More jobs are expected to appear, for example the Stabilize feature could be ported to it.


Online services integration


A new Online Resource widget made its appearance, and allows you to easily browse and download resources from the web. Currently, two services are implemented:

  • The excellent Freesound free audio library allows you to search and import audio clips in a few clicks.
  • The great Open Clip Art library allows you to import graphic files.

That's all for now, but I am quite happy with those newly introduces features, after all those months spent fixing bugs for the last release.

Interested testers can get the current git version from sunab's experimental PPA, or through the Kdenlive Build script.

Next, we have to work on the refactoring suff to improve our existing code, make it more modular and easier to contribute.

Thanks for reading, Jean-Baptiste Mardelle

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